SA4342
ONE ONLY STC, SN 1416: Installation of the AH-4 Decelostat Brake Unit. Held by Pacific Airmotive CORP, which holds 19 approved modifications in all. Last revised November 25, 1957. System: landing gear.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Lockheed Aircraft Corporation
- Models
- 14-N
- Type certificate
- ATC 683
- 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.