SA3709WE
A bolt-on retract actuator fitting specified by FAA sealed Aviation Hydraulics (Stellar Canoga Ind.) installed on the main landing gear outer cylinder. Held by Eastern Airlines, INC, which holds 42 approved modifications in all. Last revised January 22, 1979. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Lockheed Aircraft Corporation; Lockheed Aircraft Corporation; Lockheed Aircraft Corporation
- Models
- L-1011-385-1-15, L-1011-385-1, L-1011-385-1-14
- Type certificates
- A23WE, A23WE, A23WE
- 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.