SA1477CE
Structural plug installation in right side of forward fuselage when camera door is removed. Held by Avcon Industries INC, which holds 121 approved modifications in all. Last revised March 21, 1979. System: airframe structure.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.; Learjet Inc.
- Models
- Learjet 35A (C-21A), Learjet 35, Learjet 25B, Learjet 36, Learjet 25D, Learjet 25C, Learjet 25F, Learjet 25A, Learjet 25, Learjet 24F, Learjet 24E, Learjet 24B, Learjet 24, Learjet 24C, Learjet 36A, Learjet 24D, Learjet 24A
- Type certificates
- A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE, A10CE
- 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 21, 2026.