SA01734SE (PG 1)
Application of Stewart Systems synthetic fabric covering system to aircraft fuselage, wings, tail surfaces, control surfaces and related parts. Held by Andrew D. Humphrey, which holds 4 approved modifications in all. Last revised October 14, 2016. System: airframe structure.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Consolidated Vultee Aircraft Corporation Stinson Division; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; K & L Soaring LLC; K & L Soaring LLC; K & L Soaring LLC; K & L Soaring LLC; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.; Piper Aircraft Inc.
- Models
- SR-6, SR-6A, SR-6B, SR-6C, 125, 22 C7, 22 C7A, 22 C7AM, 22 C7AS, 22 C7B, 22 C7D, 22 C7E, 22 C7F, 24 C8A, 24 C8B, 24 C8D, 24 C8DS, 24 C8F (Army UC-61J), 24 C8FS, 24K (Army UC-61E), 24KS, 42, 71, FC-2-W2, KR-21B, KR-31A, KR-34B2, KR-34C, SGS 1-35, SGS 1-35A, SGS 1-35C, SGS 1-36, J3C-40, J3C-50, J3C-50S, J3C-65 (Army L-4; L-4A; L-4B (Navy NE-1); L-4H; L-4J (Navy NE-2)), J3C-65S, J3F-50, J3F-50S, J3F-60, J3F-60S, J3F-65 (Army L-4D), J3F-65S, J3L-65 (Army L-4C), J3L-65S, J3L-S, J3L, J3P, PA-11, PA-11S
- Type certificates
- ATC 580, ATC 580, ATC 580, ATC 580, ATC 368, ATC 408, ATC 438, ATC 438, ATC 438, ATC 483, ATC 503, ATC 515, ATC 517, ATC 497, ATC 498, ATC 576, ATC 576, ATC 610, ATC 610, TC 667, TC 667, ATC 242, ATC 89, ATC 61, ATC 363, TC 2-510, TC 2-505, ATC 162, G4EA, G4EA, G4EA, G5EA, A-691, A-691, A-691, A-691, A-691, A-692, A-692, A-692, A-692, A-692, A-692, A-698, A-698, A-698, A-698, TC 695, A-691, A-691
- On this site
- Fairchild 22 21 registered
Fairchild 24 242 registered
Fairchild KR-21 11 registered
Fairchild KR-31 9 registered
Fairchild KR-34 10 registered
Piper J-3 Cub 3,806 registered
Piper PA-11 Cub Special 443 registered
Schweizer SGS 1 gliders (1-26, 1-34, 1-35, 1-36) 581 registered
Stinson SR-6 5 registered - The FAA's record
- On the FAA's site
What an approved modification is
A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.
Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 7, 2026.