SA938WE
Aural warning device to sound at a 30 degree wing flap position, to be in operation when the landing gear is not down and locked. Held by Johnson Flying Svc INC, which holds 5 approved modifications in all. Last revised January 1, 1960. System: landing gear.
What it applies to
- Kind of product
- Aircraft
- Design holder
- McDonnell Douglas Corporation
- Models
- C54-DC Series
- Type certificate
- A-762
- On this site
- Douglas C-54 7 registered
- 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.