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

SA1394CE

Install structural provision for Jelco infra-red scanner. Held by Avcon Industries INC, which holds 121 approved modifications in all. Last revised January 5, 1978. 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.
Models
Learjet 25D, Learjet 25F, Learjet 24F, Learjet 24, Learjet 25, Learjet 24A, Learjet 24B, Learjet 24C, Learjet 25B, Learjet 25C, Learjet 24E, Learjet 25A, Learjet 24D
Type certificates
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 19, 2026.