SA1-480
Smoke detector system in cargo compartments Class B. Held by Flight Enterprises Intl Aircraft Svcs INC., which holds 9 approved modifications in all. System: emergency equipment.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Lockheed Aircraft Corporation; Lockheed Aircraft Corporation
- Models
- 749-79 (C-121A), 749-79 (VC-121B)
- Type certificates
- 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.