SA546WE
Modification of crew entrance door window mechanism. Held by Gamco Precision. Last revised January 1, 1960. System: airframe structure.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Lockheed Aircraft Corporation; Lockheed Aircraft Corporation; Lockheed Aircraft Corporation; Lockheed Aircraft Corporation; Lockheed Aircraft Corporation; Lockheed Aircraft Corporation; Lockheed Aircraft Corporation; Lockheed Aircraft Corporation; Lockheed Aircraft Corporation
- Models
- 1649A-98, 1049 Series, 649A-79, 49-46, 649-79, 749-79 (C-121A), 749-79 (VC-121B), 749A-79, 149-46
- Type certificates
- 4A17, 6A5, A-763, A-763, A-763, A-763, A-763, A-763, A-763
- 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.