The Aviation DataBase: Service Information: Hamilton Standard
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Information Letters
NameRevisionLangSubjectDate
en Noisy Electrically Actuated Valves01/08/1993
en Elimination of Interference between ACM P/N 740551 and Water Separator Assembly03/12/1986
en Sundstrand Environmental Control Unit Anti-Ice Valve P/N 72567310/01/1987
en Foreign Object Damage03/24/1998
B en Wear Measurement and Rework of Magnetic Heads08/09/1995
en Shipping Regulations Pertaining to Lithium Batteries05/07/1992
en Modification Kits06/06/1988
en Sundstrand Power Systems Services Administration Terminology and Definitions09/26/1990
en Product Improvement Matrix06/11/1992
Maintenance Manual Temporary Revisions
NameRevisionLangSubjectDate
en P5189 14RF-21: Propeller - Record of Temporary Revisions03/15/1993
en P5189 14RF-21: Propeller - Record of Temporary Revisions07/27/1993
en P5199 14RF-19: Propeller - Record of Temporary Revisions 04/08/1993
en P5186 14RF-9: Propeller - Record of Temporary Revisions 03/15/1993
en P5199 14RF-19: Propeller - Record of Temporary Revisions07/27/1993
en P5186 14RF-9: Propeller - Record of Temporary Revisions07/27/1993
Maintenance Manuals
NameRevisionLangSubjectDate
12 en Variable Pitch Aircraft 14RF-9 Propeller P/N 78010001/20/2012
8 en Variable Pitch Aircraft 14RF-21 Propeller P/Ns 782750-3, 782750-4, 782750-5, 782750-6, 782750-7, 782750-8 and 782750-1202/20/2013
10 en Variable Pitch Aircraft 14SF-5 Propeller01/14/2013
13 en Variable Pitch Aircraft 17SF-7 Propeller12/13/2011
2 en Variable Pitch Aircraft 14SF-11E Propeller System06/28/2012
9 en Variable Pitch Aircraft 568F-1 Propeller P/Ns 815500-2 and 815500-302/22/2013
Service Bulletins
NameRevisionLangSubjectDate
revised en Modification of Battery Charging Card P/N 11745-104/15/1982
en Modification of OEU Interface Board Switch Setting04/15/1982
en Modification of RCU for Washington Reception (Series 2, 2A or 2M Systems)05/21/1982
en Modification of RCU for Washington Reception (Series 3B System)05/21/1982
en Modification of Keyboard Interface Board P/N 11640-106/30/1982
en Navigation - Ground Proximity Warning Computer - Reduce Mode 2 Nuisance Warnings on Approach08/26/1983
en Navigation - Ground Proximity Warning Computer08/26/1983
5 en Communications - Cockpit Voice Recorders - AV-557B and AV-557C - Tape Deck Housing Connector Check/Replacement09/28/1984
en Communications - Cockpit Voice Recorder - AV-557C-980-6005-074 thru -078 Series09/01/1983
en Communications - Cockpit Voice Recorder - AV-557C-074 thru -078 Series - Replacement of Power Transformer12/22/1983
en Communications - Cockpit Voice Recorder - AV-557B and AV-557C - Improve Integrity of Direction Changing Operations05/15/1985
3 en Communications - Cockpit Voice Recorder - Improve Reliability of Self-Test Circuitry, Improve Power Monitor05/08/1992
1 en Communications - Cockpit Voice Recorder - Correct Relay Reliability Deficiency08/12/1992
1 en Communications - Cockpit Voice Recorder - Mod to Improve Noise Immunity of Selftest01/18/1993
en Communications - Cockpit Voice Recorder - Establish 6000 Hour Maintenance Action03/16/1992
en Communications - Cockpit Voice Recorder - Increase CVR Motor Life04/20/1993
en Alert Propellers - Blades - Inspect the Taper Bore08/29/1994
1 en Alert Propellers - Taper Bore Final Clearing Repair Procedure for Propeller Blades03/06/1996
en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar12/07/1995
1 en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar12/18/1995
en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar with Lead Wool Installed12/18/1995
1 en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar with Lead Wool Installed12/21/1995
2 en Propellers - Control and Adapters - Install the Ballscrew Quill Damper09/27/1994
en Propellers - Transfer Tube. Actuator Assembly - PCU - Critical Parts Inspections11/27/1995
1 en Propellers - Transfer Tube. Actuator Assembly - PCU - Critical Parts Inspections04/23/1996
en Propellers - Blade - Visual Taper Bore Inspection08/29/1994
2 en Propellers - Control and Adapter - Do the Torque Check of the Primary Ballscrew Quill for Units that Include the Secondary Drive Quill06/22/1995
1 en Propellers - Control and Adapter - Installation of the Secondary Drive Quill05/17/1995
2 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection07/28/1993
4 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection04/07/1994
6 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection05/05/1995
en Alert Propellers- Do an Ultrasonic Shear Wave Test to Look for Abnormalities in the Taper Bore of the Blade Spar04/18/1994
1 en Propellers - Control and Adapters - Install the Ballscrew Quill Damper09/27/1994
en Propellers - Transfer Tube. Actuator Assembly. PCU - Critical Parts Inspections11/27/1995
1 en Propellers - Transfer Tube. Actuator Assembly. PCU - Critical Parts Inspections04/23/1996
en Propellers - Blades - Visual Taper Bore Inspection08/29/1994
2 en Propellers - Control and Adapter - Do the Torque Check of the Primary Ballscrew Quill for Units that Include the Secondary Drive Quill06/22/1995
1 en Propellers - Control and Adapter - Installation of the Secondary Drive Quill05/17/1995
4 en Propellers - Ultrasonic Shear Wave Test of Propeller Blade Shanks11/09/1995
en Propellers - Blades - Repair of Blade Shanks07/24/1996
en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection03/12/1992
3 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection07/28/1993
5 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection04/07/1994
7 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection05/05/1995
en Alert Propellers - Transfer Tubes - New Transfer Tube Part Numbers10/27/1992
en Alert Propellers - Do an Ultrasonic Shear Wave Test to Look for Abnormalities in the Taper Bore of the Blade Spar04/18/1994
1 en Alert Propellers - Blades - Inspect the Taper Bore10/05/1994
en Alert Propellers - Off-Wing Ultrasonic Shear Wave Inspection of Propeller Blade Shanks11/09/1995
en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar12/07/1995
1 en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar12/15/1995
2 en Alert Propellers - Clearing Repair for Propeller Blade Shanks03/06/1996
1 en Alert Propellers - Taper Bore Final Clearing Repair Procedure for Propeller Blades03/06/1996
en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar with Lead Wool Installed12/18/1995
1 en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar with Lead Wool Installed12/21/1995
2 en Propellers - Control and Adapters - Install the Ballscrew Quill Damper09/27/1994
en Propellers - Transfer Tube. Actuator Assembly, PCU - Critical Parts Inspections11/27/1995
1 en Propellers - Transfer Tube. Actuator Assembly, PCU - Critical Parts Inspections04/23/1996
en Propellers - Blades - Visual Taper Bore Inspection08/29/1994
2 en Propellers - Control and Adapter - Do the Torque Check of the Primary Ballscrew Quill for Units that Include the Secondary Drive Quill06/22/1995
1 en Propellers - Control and Adapter - Installation of the Secondary Drive Quill05/17/1995
2 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection07/28/1993
4 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection04/07/1994
6 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection05/05/1995
en Alert Propellers - Transfer Tubes - New Transfer Tube Part Numbers10/27/1992
en Alert Propellers - Do an Ultrasonic Shear Wave Test to Look for Abnormalities in the Taper Bore of the Blade Spar04/18/1994
1 en Alert Propellers - Blades - Inspect the Taper Bore10/05/1994
1 en Alert Propellers - Taper Bore Final Clearing Repair Procedure for Propeller Blades03/06/1996
en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar12/07/1995
1 en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar12/15/1995
en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar with Lead Wool Installed12/18/1995
1 en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar with Lead Wool Installed12/21/1995
2 en Propellers - Control and Adapters - Install the Ballscrew Quill Damper09/27/1994
en Propellers - Transfer Tube. Actuator Assembly. PCU - Critical Parts Inspections11/27/1995
1 en Propellers - Transfer Tube. Actuator Assembly. PCU - Critical Parts Inspections04/23/1996
en Propellers - Blades - Visual Taper Bore Inspection08/29/1994
2 en Propellers - Control and Adapter - Do the Torque Check of the Primary Ballscrew Quill for Units that Include the Secondary Drive Quill06/22/1995
1 en Propellers - Control and Adapter - Installation of the Secondary Drive Quill05/17/1995
2 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection07/28/1993
4 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection04/07/1994
6 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection05/05/1995
en Alert Propellers - Transfer Tubes - New Transfer Tube Part Numbers10/27/1992
en Alert Propellers - Do an Ultrasonic Shear Wave Test to Look for Abnormalities in the Taper Bore of the Blade Spar04/18/1994
1 en Alert Propellers - Blades - Inspect the Taper Bore10/05/1994
1 en Alert Propellers - Taper Bore Final Clearing Repair Procedure for Propeller Blades03/06/1996
en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar12/07/1995
1 en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar12/15/1995
en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar with Lead Wool Installed12/18/1995
1 en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar with Lead Wool Installed12/21/1995
1 en Propellers - Blade Retention Retrofit10/01/1987
2 en Propellers - Control and Adapters - Install the Ballscrew Quill Damper09/27/1994
en Propellers - Transfer Tube, Actuator Assembly. PCU - Critical Parts Inspections11/27/1995
1 en Propellers - Transfer Tube, Actuator Assembly. PCU - Critical Parts Inspections04/23/1996
en Propellers - Blades - Visual Taper Bore Inspection08/29/1994
2 en Propellers - Control and Adapter - Do the Torque Check of the Primary Ballscrew Quill for Units that Include the Secondary Drive Quill06/22/1995
1 en Propellers - Control and Adapter - Installation of the Secondary Drive Quill05/17/1995
1 en Propellers - Auxiliary Motor and Pump - Retrofit to a New Part Number 782655-412/21/2016
2 en Alert Propellers - Periodic Inspection of Blade Retaining Rings03/27/1987
2 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection07/28/1993
4 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection04/07/1994
6 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection05/05/1995
en Alert Propellers - Transfer Tubes - New Transfer Tube Part Numbers10/27/1992
en Alert Propellers - Do an Ultrasonic Shear Wave Test to Look for Abnormalities in the Taper Bore of the Blade Spar04/18/1994
1 en Alert Propellers - Blades - Inspect the Taper Bore10/05/1994
1 en Alert Propellers - Taper Bore Final Clearing Repair Procedure for Propeller Blades03/06/1996
en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar12/07/1995
1 en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar12/15/1995
en Alert Propellers - Ultrasonic Shear Wave Test for Abnormalities in the Taper Bore of the Blade Spar with Lead Wool Installed12/18/1995
en Air Conditioning - Bypass Valve - Modification of DC Rotary Actuators02/14/1990
en Air Conditioning - Fan Housing and Aspirator - Replacement of Plastic Aspirator with an Aluminum Aspirator08/13/1990
1 en Alert Propellers- Propeller Blade Inspection05/29/1997
en Alert Propeller - Variable Pitch Aircraft Propeller - Blade Taper Bore Eddy Current Inspection08/26/2019
1 en Alert Propeller - Variable Pitch Aircraft Propeller - Blade Taper Bore Eddy Current Inspection05/01/2020
en Alert Propeller - Variable Pitch Aircraft Propeller - Blade Taper Bore Eddy Currect Inspection05/29/2020
1 en Alert Propellers - Inspection of Propeller Blades and Counterweights11/01/1984
en Engine Fuel & Control - Incorporation of an Improved Throttle Valve Pilot Valve Bearing Anti-Rotation Link Design01/07/1977
1 en Engine Fuel and Control - Fuel Control - Incorporation of Finer Screen on Throttle Valve Pilot Valve09/20/1986
1 en Engine Fuel & Control - Incorporation of an Improved Shutoff Valve Configuration10/27/1976
1 en Engine Fuel and Control - Fuel Control - Incorporation of a Nitrided Pivoting Spring Retainer (Throttle Valve Position Adjustment) and Mating Fuel Flow Lever Pivot08/15/1991
en Engine Fuel & Control - Incorporation of Improved Tt2, PH and PR Pilot Valve Thrust Bearings11/16/1973
1 en Engine Fuel and Control - Fuel Control - Incorporation of an Improved Multiplying Linkage Assembly09/27/1982
en Engine Fuel & Control - Incorporation of Improved Pambient and Tt2 Servo Piston Sealing05/29/1974
1 en Engine Fuel and Control - Fuel Control - Incorporation of a PRV Sensor Flapper Stop09/27/1977
2 en Engine Fuel & Control - Incorporation of an Inertia Damper Tube in the PRV Sensor Downstream Throttle Valve Line10/31/1978
1 en Engine Fuel & Control - Incorporation of Improved Guidance of PS4 Servo Piston Rod04/22/1975
3 en Engine Fuel & Control - Incorporation of an Improved Throttle Valve Pilot Valve Bearing Anti-Rotation Link Design07/01/1977
en Engine Fuel and Control - Incorporation of Improved Throttle Valve Pilot Valve Thrust Bearing02/27/1976
2 en Engine Fuel and Control - Fuel Control - Incorporation of a Nitrided Pivoting Spring Retainer (Throttle Valve Position Adjustment) and Mating Fuel Flow Lever Pivot12/13/1993
1 en Engine Fuel & Control - Incorporation of an Improved Shutoff Valve Configuration10/27/1976
3 en Engine Fuel & Control - Incorporation of Improved Tt2, PH and PR Pilot Valve Thrust Bearings10/15/1974
en Engine Fuel & Control - Incorporation of Improved Pambeint and Tt2 Servo Piston Sealing05/29/1974
1 en Engine Fuel and Control - Fuel Control - Incorporation of a PRV Sensor Flapper Stop09/27/1977
2 en Engine Fuel & Control - Incorporation of an Inertia Damper Tube in the PRV Sensor Downstream Throttle Valve Line10/31/1978
1 en Engine Fuel & Control - Incorporation of Improved Guidance of PS4 Servo Piston Rod08/29/1975
3 en Engine Fuel & Control - Incorporation of an Improved Throttle Valve Pilot Valve Bearing Anti-Rotation Link Design07/01/1977
en Engine Fuel and Control - Incorporation of Improved Throttle Valve Pilot Valve Thrust Bearing02/27/1976
1 en Engine Fuel and Control - Fuel Control - Incorporation of a Nitrided Pivoting Spring Retainer (Throttle Valve Position Adjustment) and Mating Fuel Flow Lever Pivot08/15/1991
1 en Air-Engine Vane Control - Incorporation of an Additional Seal on Actuator Pilot Valve Sleeve11/08/1979
2 en Air - Engine Vane Control - Incorporation of Fluid Drain Between Sensor Servo Piston Chevron Seals08/20/1991
en Air - Engine Vane Control - Incorporation of a New Pilot Valve Spring03/31/1988
1 en Air - Engine Vane Control - Incorporation of a New Actuator Valve08/20/1991
1 en Air - Engine Vane Control - Incorporation of New Bellows Flexures08/20/1991
en Air - Engine Vane Control - Incorporation of New Headed Pivot Pins09/10/1974
en Air-Engine Vane Control-Incorporation of New Position Adjustment Bracket01/03/1975
en Air - Engine Vane Control - Incorporation of Strengthened Flexural Pivots05/23/1975
3 en Air - Engine Vane Control - Incorporation of an Additional Seal on Actuator Pilot Valve Sleeve08/19/1991
en Air - Engine Vane Control - Incorporation of New Calibration Requirements09/01/1978
1 en Air - Engine Vane Control - Incorporation of Fluid Drain Between Sensor Servo Piston Chevron Seals08/19/1991
en Air - Engine Vane Control - Incorporation of a New Pilot Valve Spring03/31/1988
1 en Air - Engine Vane Control - Incorporation of a New Actuator Valve08/19/1991
en Air - Engine Vane Control - Incorporation of New Bellows Flexure09/10/1974
1 en Air - Engine Vane Control - Incorporation of New Bellows Flexure08/19/1991
en Air - Engine Vane Control - Incorporation of New Feedback Lever05/13/1991
en Air - Engine Vane Control - Incorporation of Strengthened Flexural Pivots05/23/1975
1 en Air - Engine Vane Control - Incorporation of New Calibration Requirements09/01/1978
3 en Air - Engine Vane Control - Incorporation of an Additional Seal on Actuator Pilot Valve Sleeve08/16/1991
3 en Air - Engine Vane Control - Incorporation of Fluid Drain Between Sensor Servo Piston Chevron Seals08/16/1991
1 en Air - Engine Vane Control - Conversion of Engine Vane Control PN 747955-1 to PN 747955-308/16/1991
2 en Air - Engine Vane Control- Incorporation of a New Pilot Valve Spring04/25/1991
1 en Air - Engine Vane Control - Incorporation of a New Actuator Valve08/16/1991
1 en Air - Engine Vane Control - Incorporation of New Bellows Flexure08/16/1991
en Air - Engine Vane Control - Incorporation of New Feedback Lever05/13/1991
en Inspection and Repair of Steel Blades08/11/1949
en Inspection and Repair of Steel Blades07/13/1950
en De-Icing Equipment Installation07/24/1951
en Adapter Retaining Screws01/28/1952
en Reversing Circuit Modification03/07/1952
en Control Box Modification12/24/1952
2 en Propellers - Control and Adapters - Install the Ballscrew Quill Damper09/27/1994
2 en Propellers - Control and Adapter - Do the Torque Check of the Primary Ballscrew Quill for Units that Include the Secondary Drive Quill06/22/1995
1 en Propellers - Control and Adapter - Installation of the Secondary Drive Quill05/17/1995
1 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection07/28/1993
3 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection04/07/1994
5 en Alert Propellers - Controls - Servo Ballscrew Internal Spline Inspection05/05/1995
en Decrease Pitch Pressure Relief System07/20/1953
en Stop Lever Rework08/26/1953
A en Stop Lever Rework12/21/1953
en Synchronizer Toggle Switch Circuit Protection12/21/1953
en "E" Size Wedge Insert Type Servo Piston Shaft Inspection03/05/1954
en Maintenance of Steel Blades07/08/1954
en 2H17 Blade Operational Life06/17/1954
en Model 43E60 Propeller Modification09/10/1954
en Addition of Second Flyweight Chamber Drain
A en Addition of Second Flyweight Chamber Drain11/17/1955
en Aluminum Blade Corrosion01/06/1956
A en Aluminum Blade Corrosion02/27/1956
B en Aluminum Blade Corrosion08/17/1956
en RPM Sensitive Hydraulic Pitch Lock for 34E60 Propellers01/30/1956
A en RPM Sensitive Hydraulic Pitch Lock for 34E60 Propellers09/06/1957
en Use of Epoxy-Graphite Mixture on Aluminum Blade Shanks03/07/1956
en Installation of Teflon Foil on Aluminum Blade Shanks05/07/1956
A en Installation of Teflon Foil on Aluminum Blade Shanks03/26/1957
en Lever Sleeve Bushing Rework11/19/1956
A en Lever Sleeve Bushing Rework05/07/1957
B en Lever Sleeve Bushing Rework10/17/1958
C en Lever Sleeve Bushing Rework
D en Dome Cap and Lever Sleeve Bushing Fit03/07/1958
en Reidentification of Blade Shank Teflon Strips and Application Procedure Modification05/21/1957
A en Reidentification of Blade Shank Teflon Strips and Application Procedure Modification08/22/1957
B en Reidentification of Blade Shank Teflon Strips and Application Procedure Modification10/20/1958
C en Reidentification of Blade Shank Teflon Strips and Application Procedure Modification12/01/1958
en Repair of Control Bodies Having Unacceptable Relief Valve Passage Wall Thickness07/10/1957
A en Repair of Control Bodies Having Unacceptable Relief Valve Passage Wall Thickness10/25/1957
en Oil Hole Plug Leakage in 4U18 and 5U18 Controls10/09/1957
A en Oil Hole Plug Leakage in 4U18 and 5U18 Controls03/28/1958
en Control Body Solenoid Boss Grooving to Vent Possible Plug Leakage11/20/1957
A en Control Body Solenoid Boss Grooving to Vent Possible Plug Leakage12/16/1957
B en Control Body Solenoid Boss Grooving to Vent Possible Plug Leakage03/06/1959
C en Control Body Solenoid Boss Grooving to Vent Possible Plug Leakage11/03/1959
en Blade Face Alignment Measurements for Revealing Accidental Bending Damage02/14/1958
A en Blade Face Alignment Measurements for Revealing Accidental Bending Damage07/25/1958
en 2H17AC3 Blade Operational Life07/03/1958
A en Separate Feathering Valve Type Constant Speed Controls12/12/1958
en The 5AB23 Separate Feathering Type Constant Speed Control05/26/1959
en Disposition of Aluminum Bladed Propellers having Experienced Impact08/13/1959
A en Disposition of Aluminum Bladed Propellers having Experienced Impact06/17/1960
B en Disposition of Aluminum Bladed Propellers having Experienced Impact02/12/1963
en Application of Blade Alignment Indicator Gage HS-815010/27/1959
A en Application of Blade Alignment Indicator Gage HS-815007/30/1960
en Operating Recommendations and Barrel Rework for 33E60 Propellers with 6491-0 and 6801-0 Blades on Fairchild C-82 Aircraft Powered by P&WA 0.45 Geared R-2800 Engines01/30/1962
en Flight Controls - Brake Motor - Replace Coupling08/08/1995
en Airborne Auxiliary Power - Engine - Replacement of Start Bypass Valve Mounting Bolts07/12/1990
en Airborne Auxiliary Power - Engine - Replacement of Start Bypass Valve Mounting Bolts07/18/1990
en Hydraulic Power- Ram Air Turbine - Replace Counterweight and Flyweight Assemblies11/30/2005
en Emergency Hydraulic Power - Ram Air Turbine - Replace Balance Washer Retention Screws02/10/2010
en Hydraulic Power - Ram Air Turbine - Replace Counterweight and Flyweight Assemblies11/30/2005
en Emergency Hydraulic Power - Ram Air Turbine - Replace Balance Washer Retention Screws02/10/2010
en Emergency Hydraulic Power - Ram Air Turbine - Replace Balance Washer Screws08/04/2009
en Emergency Hydraulic Power - Ram Air Turbine - Replace Balance Washer Screws08/04/2009
1 en Alert Flight Controls - Torque Tube Assembly - Replacement of Splined Couplings09/15/1990
1 en Alert Flight Controls - Torque Tube Assembly - Replacement of Splined Coupling01/25/1991
1 en Alert Flight Controls - Torque Tube Assembly - Replacement of Splined Couplings09/15/1990
1 en Alert Flight Controls - Torque Tube Assembly - Replacement of Splined Coupling09/15/1990
1 en Alert Flight Controls - Torque Tube Assembly - Replacement of Splined Couplings09/15/1990
1 en Alert Flight Controls - Torque Tube Assembly - Replacement of Splined Couplings09/15/1990
1 en Alert Flight Controls - Torque Tube Assembly - Replacement of Splined Coupling09/15/1990
en Electric Power - Generator Control Unit - Installation of Air Vent Cover06/15/1989
en Air Conditioning - Environmental Control Unit - Modification of Water Separator Assembly and Ejector Replacement06/08/1984
en Air Conditioning - Environmental Control Unit -Modification of Water Separator Assembly02/06/1987
1 en Air Conditioning - Air Cycle Machine - Incorporate New Oil Sump with Fill Ports01/28/2008
en Flight Controls - Left Asymmetry Brake Assembly - Replacement of Position Sensor Assembly11/21/1986
1 en Flight Controls - Right Asymmetry Brake Assembly - Replacement of Position Sensor Assembly10/01/1987
en Flight Controls - Angle Gearbox Assembly - Replacement of Roller Bearings and Shaft07/15/1989
en Air Conditioning - Air Management Systems Controller Processor Board - Incorporation of New Ops Software (Black Label 11.0)11/23/2010
en Alert Airborne Auxiliary Power - Engine - Introduction of Bracket to Prevent Fuel Filter Button Protrusion12/02/2003
2 en Alert Airborne Auxiliary Power - Engine - Introduction of Bracket to Prevent Fuel Filter Button Protrusion10/04/2004
2 en Alert Engine Fuel and Control - Pumping Unit Assembly - Check Diffuser Assembly05/03/1994
en Alert Propellers - Propeller Control - Inspection/Replacement of Valve Housing Cover Input Lever Gear12/10/1985
en Engine Fuel and Control - EEC160-10 Electronic Engine Control - Field Reprograming07/18/2002
en Emergency Hydraulic Power - RAT Turbine-Lower Gearbox Assembly - Replace Balance Washer Screws07/20/2009
en Emergency Hydraulic Power - Ram Air Turbine Module - Modify Actuator03/08/2011
en Emergency Hydraulic Power - Ram Air Turbine Module -Check/Replace Pump08/06/2012
1 en Mandataory Emergency Hydraulic Power - RAM Air Turbine Module - Check/Replace Actuator04/14/2015
en Emergency Hydraulic Power - Ram Air Turbine - Replace Balance Weight/Washer Screws06/17/2009
en Hydraulic Power - Airborne Ground Check Module - Replace Disc Valve06/24/1998
en Emergency Hydraulic Power - Turbine and Gearbox Assembly - Replace Balance Weight/Washer Screws08/04/2009
en Emergency Hydraulic Power - Ram Air Turbine - Modify Actuator03/08/2011
en Mandatory Emergency Hydraulic Power - RAM Air Turbine - Check/Replace Actuator06/06/2014
3 en Air - Engine Vane and Bleed Control - Incorporation of Fluid Drain Between Sensor Servo Piston Chevron Seals08/15/1992
en Air - Engine Vane and Bleed Control - Incorporation of a New Pilot Valve Spring03/20/1988
en Air - Engine Vane and Bleed Control - Incorporation of a New Decal Bleed Reset Piston Spring03/31/1988
1 en Air - Engine Vane and Bleed Control - Incorporation of a New Actuator Valve08/21/1991
1 en Air - Engine Vane and Bleed Control - Incorporation of a New Bellows Flexure08/21/1991
1 en Engine Fuel and Control - Fuel Control - Inspection for Fuel Leakage and Replacement of Packing and Back-Up Retaining Ring10/26/1990
1 en Engine Fuel and Control - Fuel Control - Inspection for Fuel Leakage and Replacement of Packing and Back-Up Retaining Ring10/26/1990
1 en Engine Fuel and Control - Fuel Control - Inspection for Fuel Leakage and Replacement of Packing and Back-Up Retaining Ring10/26/1990
en Engine Fuel and Control - Fuel Control - Inspection for Fuel Leakage and Replacement of Packing and Back-Up Retaining Ring11/21/1990
1 en Engine Inspection for Fuel and Control - Fuel Control - Fuel Leakage and Replacement of Packing and Back-Up Retaining Ring10/26/1990
1 en Engine Fuel and Control - Fuel Control - Inspection for Fuel Leakage and Replacement of Packing and Back-Up Retaining Ring10/26/1990
1 en Engine Fuel and Control - JFC131-2 Fuel Metering Unit - Add Spring to Metering Valve (MV) and Modify Control Orifice05/18/2011
en R70-3W Environmental Control System - Refrigeration Package - Addition of Water Aspirator Guard02/01/1972
en Refrigeration Package - Air Cycle Machine - Replace Bearing Sleeve Retaining Pin02/01/1972
en R70-3W Environmental Control System - Water Separator - Replacement of Coupling Bolt and Nut09/18/1972
en Refrigeration Package - Air Cycle Machine - Replacement of Oil Sump12/01/1973
en Revised Chip Detector Inspection Procedure05/10/1988
1 en Inspection and Replacement of IMC Manufactured Fuel Solenoid Valves07/06/1989
1 en Airborne Auxiliary Power - Engine - Inspection of Main Fuel Manifold03/31/1994
11 en Airborne Auxiliary Power - Engine - Replacement of APU Life-Limited Components (Turbine Wheel and Compressor Wheel)05/18/2001
10 en Airborne Auxiliary Power - Engine - Preventative Maintenance Schedule08/29/2005
en Airborne Auxiliary Power - Combustion - Introduction of Combustor Liner Performed Packings P/N 17980003/17/1992
en Airborne Auxiliary Power - Engine - Extension of APU Turbine Wheel Operating Limits09/15/1992
en Airborne Auxiliary Power - Engine - Replacement of Compressor Wheel07/22/1996
1 en Airborne Auxiliary Power - Engine - Replacement of Compressor Wheel09/09/1996
2 en Airborne Auxiliary Power - Engine - Replacement of Compressor Wheel11/05/1996
Service Information
NameRevisionLangSubjectDate
en Noisy Electrically Actuated Valves01/08/1993
en Air Conditioning - Cessna Citation - Replacement of Bypass Valve04/07/1978
Miscellaneous
NameRevisionLangSubjectDate
en Checkout & Troubleshooting Guide: R70-3W Temperature Control System04/20/1978
en Evaluation Bulletin: Airborne Auxiliary Power - Engine - Improved Pin C Output for ESU06/01/1993