The STC search system is a complimentary service provided to the aviation community. We hope you find it useful. We do not provide access to STC engineering. For that you need to contact the STC holder directly. Our primary product is a comprehensive library of aviation regulations and standards, including tools for generating Airworthiness Directive compliance reports.

No. of STCs: 12

STC Holder: A D Howard 6817 NW 43rd St, Bethany, OK 73008, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1072SW	Status: Current	App Date: 09/04/1969	Rev Date: 09/22/1969
Description: Installation of Universal camera.
TC Nos.: 2A4, 6A1
Models: Twin Commander Aircraft LLC500, 500-A, 500-B, 500-S, 500-U, 560-A, 560-E, 560-F, 680, 680-E, 680-F
ACO: AIR-760: Central Certification Branch FTW

STC Holder: A D Howard 6817 NW 43rd St, Bethany, OK 73008, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1122SW	Status: Current	App Date: 01/20/1970	Rev Date: 02/05/1970
Description: Installation of dual cameras and navigation sight
TC Nos.: 2A4, 6A1
Models: Twin Commander Aircraft LLC500, 500-A, 500-B, 500-S, 500-U, 560-A, 560-E, 560-F, 680, 680-E, 680-F
ACO: AIR-760: Central Certification Branch FTW

STC Holder: A D Howard 6817 NW 43rd St, Bethany, OK 73008, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1332SW	Status: Current	App Date: 06/09/1971	Rev Date: 06/24/1971
Description: Modification of fuselage for camera and navigation sight installation
TC Nos.: 2A4, 6A1
Models: Twin Commander Aircraft LLC500, 500-A, 500-B, 500-S, 500-U, 560, 560-A, 560-E, 560-F, 680, 680-E, 680-F
ACO: AIR-760: Central Certification Branch FTW

STC Holder: A D Howard 6817 NW 43rd St, Bethany, OK 73008, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1358SW	Status: Current	App Date: 08/15/1971	Rev Date: 04/25/1983
Description: Dual or single camera installation and navigation sights.
TC Nos.: 2A4
Models: Twin Commander Aircraft LLC680-FL, 680-FL(P)
ACO: AIR-760: Central Certification Branch FTW

STC Holder: A D Howard 6817 NW 43rd St, Bethany, OK 73008, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1529SW	Status: Current	App Date: 08/23/1972	Rev Date: 07/25/1973
Description: Modification of hydraulic system and air conditioning pressurization system.
TC Nos.: 2A4
Models: Twin Commander Aircraft LLC680-V, 680-W
ACO: AIR-760: Central Certification Branch FTW

STC Holder: A D Howard 6817 NW 43rd St, Bethany, OK 73008, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1530SW	Status: Current	App Date: 08/23/1972	Rev Date: 12/23/1972
Description: Modify existing 3000 psi hydraulic system to 1000 psi hydraulic system.
TC Nos.: 2A4
Models: Twin Commander Aircraft LLC680-V, 680-W
ACO: AIR-760: Central Certification Branch FTW

STC Holder: A D Howard Route 2, Box 4, Culdesac, ID 83524, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1584SW	Status: Historical	App Date:	Rev Date:
Description: Aerial survey camera.
TC Nos.: 2A4
Models: Twin Commander Aircraft Corporation680FL(P), 680T, 680V, 680W, 690
ACO: Seattle ACO Branch, Tel: +1 (206) 231-3500

STC Holder: A D Howard 6817 NW 43rd St, Bethany, OK 73008, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1649SW	Status: Current	App Date: 04/04/1973	Rev Date: 05/01/1973
Description: Camera installation.
TC Nos.: 2A4
Models: Twin Commander Aircraft LLC680-FL, 685
ACO: AIR-760: Central Certification Branch FTW

STC Holder: A D Howard 717 6th Avenue, Lewiston, ID 83501, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1863SW	Status: Historical	App Date: 02/10/1974	Rev Date: 04/03/2006
Description: Installation of single and dual aerial survey cameras and navigation sights
TC Nos.: A25CE, A7CE
Models: Cessna Aircraft Company401, 401A, 401B, 402, 402A, 402B, 402C, 404, 411, 411A The Cessna Aircraft Company402
ACO: Ft. Worth ACO Branch, Tel: +1 (817) 222-5140

STC Holder: A D Howard 6817 NW 43rd St, Bethany, OK 73008, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA1977SW	Status: Current	App Date: 04/21/1975	Rev Date: 05/06/1975
Description: Modification of fuselage for installation of doppler antenna.
TC Nos.: 2A4
Models: Twin Commander Aircraft LLC680-FL, 680-FL(P), 680-T, 680-V, 680-W, 681, 685, 690, 690A
ACO: AIR-760: Central Certification Branch FTW

STC Holder: A D Howard 1911 Moulton Court, Oklahoma City, OK 73127, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA2333SW	Status: Current	App Date: 06/28/1976	Rev Date: 11/20/1978
Description: Installation of fiberglass tailcone for magnetometer.
TC Nos.: A7CE
Models: Cessna Aircraft Company402, 402A, 402B
ACO: AIR-760: Central Certification Branch FTW

STC Holder: A D Howard PO Box 32537, Oklahoma City, OK 73123, United States		If you are an STC Holder, Contact us to have your company added here!
STC No.: SA7837SW	Status: Historical	App Date: 08/11/1989	Rev Date: 06/26/1990
Description: Structural provisions for camera and navigation sight.
TC Nos.: 2A4
Models: Twin Commander Aircraft Corporation690D, 695A, 695B
ACO: Ft. Worth ACO Branch, Tel: +1 (817) 222-5140