The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · issued

SA1757CE

Install inverter mounting provisions. Held by Avcon Industries INC, which holds 121 approved modifications in all. Last revised August 9, 1982. System: electric propulsion.

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.
Models
Learjet 25B, Learjet 25, Learjet 25D, Learjet 25A, Learjet 25C, Learjet 36A, Learjet 36, Learjet 35A (C-21A), Learjet 35, Learjet 25F
Type certificates
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 20, 2026.