SA1376CE
Andrea Radio Corp. (A-81) five station interphone system installation. Held by Learjet INC, which holds 538 approved modifications in all. Last revised June 22, 1990. System: instruments and avionics.
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 25A, Learjet 25C, Learjet 25D, Learjet 25F, Learjet 35A (C-21A), Learjet 36, Learjet 36A, Learjet 35
- 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.