SA488SW
Installation of #1 and #2 VHF communication system, VHF navigation system, #2 compass system, flight data recorder wiring modification, transponder antenna bracket and RCA AVQ-60D transponder. Held by Northwest Airlines, INC., which holds 29 approved modifications in all. Last revised November 14, 1986. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.; Fairchild Industries Inc.
- Models
- F27-J, F27, F27-F, F27-A
- Type certificates
- 7A1, 7A1, 7A1, 7A1
- 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 22, 2026.