STC Holder: On Mark Engineering Co

The Aviation DataBase -- STC Selection System
Aviation DataSource, Inc.

No. of STCs: 21

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA1552WE	Status: Historical	App Date:	Rev Date: 01/01/1960
TC Nos.: L-3-4, L-3-4,
Models: Douglas Aircraft Co. Inc.: Army A-26B , Army A-26C
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Installation of stack assembly exhaust.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-1219	Status: Historical	App Date:	Rev Date:
TC Nos.: L-3-4, L-3-4,
Models: Douglas Aircraft Co. Inc.: Army A-26B, Army A-26C
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Fuselage pressurization, higher horsepower engines and nose wheel steering modification and autopilot installation.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-1219	Status: Historical	App Date:	Rev Date: 01/01/1960
TC Nos.: L-3-4, L-3-4,
Models: Douglas Aircraft Co. Inc.: Army A-26B, Army A-26C
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Fuselage pressurization, higher horsepower engines and nose wheel steering modification and autopilot installation.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-1470	Status: Historical	App Date:	Rev Date:
TC Nos.: 785, 2-548,
Models: General Dynamics Corporation: 28-5ACF, PBY-5A (Army OA-10A)
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Alclad sheet .020 2024-T3.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-1470	Status: Historical	App Date:	Rev Date: 01/01/1960
TC Nos.: 785, 2-548,
Models: General Dynamics Corporation: 28-5ACF, PBY-5A (Army OA-10A)
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Alclad sheet .020 2024-T3.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-240	Status: Historical	App Date:	Rev Date:
TC Nos.: 2A4,
Models: Twin Commander Aircraft Corporation: 680 Series
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Electric hydraulic pump.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-240	Status: Historical	App Date:	Rev Date: 01/01/1960
TC Nos.: 2A4,
Models: Twin Commander Aircraft Corporation: 680 Series
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Electric hydraulic pump.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-385	Status: Historical	App Date:	Rev Date: 01/01/1960
TC Nos.: L-3-4, L-3-4,
Models: Douglas Aircraft Co. Inc.: Army A-26B, Army A-26C
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
103-inch plastic and metal nose.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-385	Status: Historical	App Date:	Rev Date:
TC Nos.: L-3-4, L-3-4,
Models: Douglas Aircraft Co. Inc.: Army A-26B, Army A-26C
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
103-inch plastic and metal nose.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-386	Status: Historical	App Date:	Rev Date: 01/01/1960
TC Nos.: L-3-4, L-3-4,
Models: Douglas Aircraft Co. Inc.: Army A-26B , Army A-26C
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Jato installation in nacelles.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-386	Status: Historical	App Date:	Rev Date:
TC Nos.: L-3-4, L-3-4,
Models: Douglas Aircraft Co. Inc.: Army A-26B , Army A-26C
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Jato installation in nacelles.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-470	Status: Historical	App Date:	Rev Date: 01/01/1960
TC Nos.: A-793,
Models: Tracor Flight Systems Inc.: 240 Series
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
ADF loop.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-470	Status: Historical	App Date:	Rev Date:
TC Nos.: A-793,
Models: Tracor Flight Systems Inc.: 240 Series
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
ADF loop.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-474	Status: Historical	App Date:	Rev Date: 01/01/1960
TC Nos.: L-3-4, L-3-4,
Models: Douglas Aircraft Co. Inc.: Army A-26B, Army A-26C
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Collins AP101 automatic pilot system.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-474	Status: Historical	App Date:	Rev Date:
TC Nos.: L-3-4, L-3-4,
Models: Douglas Aircraft Co. Inc.: Army A-26B, Army A-26C
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Collins AP101 automatic pilot system.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-529	Status: Historical	App Date:	Rev Date:
TC Nos.: 2-576, 2-576,
Models: Douglas Aircraft Co. Inc.: Army B-23 , Army UC-67
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Short engine exhaust stacks and modified nacelle and exhaust shroud on aircraft equipped with Wright R-2600-29 engines.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-529	Status: Historical	App Date:	Rev Date: 01/01/1960
TC Nos.: 2-576, 2-576,
Models: Douglas Aircraft Co. Inc.: Army B-23 , Army UC-67
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Short engine exhaust stacks and modified nacelle and exhaust shroud on aircraft equipped with Wright R-2600-29 engines.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-606	Status: Historical	App Date:	Rev Date:
TC Nos.: L-3-4, L-3-4,
Models: Douglas Aircraft Co. Inc.: Army A-26B , Army A-26C
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Air conditioner.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA4-606	Status: Historical	App Date:	Rev Date: 01/01/1960
TC Nos.: L-3-4, L-3-4,
Models: Douglas Aircraft Co. Inc.: Army A-26B , Army A-26C
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Air conditioner.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA692WE	Status: Historical	App Date:	Rev Date:
TC Nos.: L-3-4, L-3-4,
Models: Douglas Aircraft Co. Inc.: Army A-26B, Army A-26C
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Modification consists of spar reinforcements.

STC Holder: On Mark Engineering Co Address: 7929 Hayvenhurst, Van Nuys, CA 91408, United States		Contact us to have your company added here!
STC No.: SA692WE	Status: Historical	App Date:	Rev Date: 01/01/1960
TC Nos.: L-3-4, L-3-4,
Models: Douglas Aircraft Co. Inc.: Army A-26B, Army A-26C
ACO: Los Angeles ACO Branch, Tel: +1 (562) 627-5200
Modification consists of spar reinforcements.