The Aviation DataBase: Service Information: Helicopter Technology
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DataBases updated: Jul 18th, 2025
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Alternative Methods of Compliance
NameRevisionLangSubjectDate
en Removal Inspection and Removal Requirements of Paragraphs (a) and (b) of AD 96-10-09 for Helicopters Modified by Helicopter Technology (HTC) STC SR09074RC10/10/1996
en Removal Inspection and Removal Requirements of Paragraphs (a) and (b) of AD 96-10-09 for Helicopters Modified by Helicopter Technology (HTC) STC SR09184RC3/17/1998
en Service Life Limit of all Tail Rotor Blades Affected by AD 2003-08-51 to be Increased from 400 Hours Time in Service to their Previous Life Limit6/13/2003
Maintenance Manuals
NameRevisionLangSubjectDate
G en Part Number 500P2100 All Variants, 500P2300 All Variants, 369D21120 All Variants, 369D21121 All Variants, and 369D21123 All Variants Main Rotor Blades (Installation and Maintenance)1/11/2008
H en Part Number 500P2100 All Variants, 500P2300 All Variants, 369D21120 All Variants, 369D21121 All Variants, and 369D21123 All Variants Main Rotor Blades (Installation and Maintenance)2/12/2009
I en Part Number 500P2100 All Variants, 500P2300 All Variants, 369D21120 All Variants, 369D21121 All Variants, and 369D21123 All Variants Main Rotor Blades (Installation and Maintenance)12/2/2015
C en Part Numbers: 500P3100-101, -103, -105, -301, -303, and -305; 500P3300-501, -503, and -505; 500P3500-701, -703, and -705; 369D21640-501, -503, -505, and -507; 369D21641-501, -503, -505, and -507; 369D21642-501, -503, -505, and -507; and 369D21643-501, -503, -505, and -507 Tail Rotor Blades (Installation and Maintenance)11/22/2004
B en Part Number 204P2100-101 UH-1H Main Rotor Blade4/10/2015
C en Part Number 204P2100-101 UH-1H Main Rotor Blade5/12/2015
Memos
NameRevisionLangSubjectDate
en Replacement Balance Weights and Weight Retention Screws for HTC Tail Rotor Blade P/Ns 500P3100 All Variants, 500P3300 All Variants and 500P3500 All Variants3/30/2016
en Interchangeability of Main Rotor Blades4/23/2009
en Interchangeability of Main Rotor Blades4/23/2009
en Replacement Pitch (Feathering) Bearings for HTC Tail Rotor Blade4/25/2007
en P/N 500P2100-101 and -103 Blade Assembly, Main Rotor are Fully Interchangeable in Any Combination with MD Helicopters Main Rotor Blade P/N 369D21100-5175/15/2003
en P/N 500P2300-501 and -503 Blade Assembly, Main Rotor are Fully Interchangeable in Any Combination with MD Helicopters Main Rotor Blade P/N 369D21102-5235/15/2003
en Replacement Pitch (Feathering) Bearings for HTC Tail Rotor Blade Part Number7/14/2021
Publication Indexes
NameRevisionLangSubjectDate
B en 7/30/2015
C en 1/20/2017
D en 6/19/2020
U en 2/12/2009
V en 11/4/2011
X en 12/2/2015
P en 2/12/2009
Q en 11/4/2011
S en 12/2/2015
M en 11/1/2005
F en 11/1/2005
F en 11/1/2005
Service Bulletins
NameRevisionLangSubjectDate
2 en Mandatory Inspection of Main Rotor Blade11/14/2000
3 en Mandatory Main Rotor Blade Torque Event (TE) Inspection1/5/2004
2 en Mandatory Main Rotor Blade Corrosion Inspection and Protection12/23/2005
3 en Mandatory Main Rotor Blade Abrasion Strip Daily Inspection Requirements4/29/2016
4 en Mandatory Main Rotor Blade Abrasion Strip Daily Inspection Requirements6/1/2017
en Mandatory Main Rotor Blade - Enhanced 100-Hour Inspection Requirements5/25/2017
en Mandatory Main Rotor Blade - Enhanced 100-Hour Inspection Requirements10/25/2019
4 en Mandatory Tail Rotor Blade Abrasion Strip Tap Test and Modification5/10/2006
en Mandatory Tail Rotor Blade Pitch Control Arm Corrosion Inspection8/25/2011
Service Notices
NameRevisionLangSubjectDate
en Main Rotor Blade Root End Periodic Inspection Requirements7/5/2017
2 en Main Rotor Blade Root End Periodic Inspection Requirements9/13/2014
3 en Main Rotor Blade Root End Periodic Inspection Requirements12/12/2017
en Main Rotor Blade Root Fitting Periodic Inspection Requirements8/25/2014
en Main Rotor Blade Abrasion Tape10/12/2012
en Main Rotor Blade Drain Hole Clearance7/23/2015
en Main Rotor Blade Abrasion Strip Periodic Inspection Requirements1/25/2016
2 en Main Rotor Blade Abrasion Strip Periodic Inspection Requirements2/4/2016
draft en Main Rotor Blade Trim Tab Bending Limitations9/27/2016
en Tail Rotor Blade Tip Weight Retention Bolt Inspection6/17/2003
en Tail Rotor Blade Control Arm Bushing Sealing6/17/2003
en Tail Rotor Blade Pitch Arm Bushing Bore Fit Check2/28/2007
en Tail Rotor Blade Pitch Arm Corrosion Protection6/4/2014
en Tail Rotor Blade Drain Hole Clearance7/23/2015
Miscellaneous
NameRevisionLangSubjectDate
en EASA Repair Station Approval9/2/2016