SA4239SW
Installation of foot warmers for cockpit and crew compartment heat. Held by Air Freighters Intl INC, which holds 5 approved modifications in all. Last revised November 26, 1980. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Mitsubishi Heavy Industries Ltd.; Mitsubishi Heavy Industries Ltd.; Mitsubishi Heavy Industries Ltd.; Mitsubishi Heavy Industries Ltd.
- Models
- YS-11A-200, YS-11A-300, YS-11A-500, YS-11A-600
- Type certificates
- A1PC, A1PC, A1PC, A1PC
- 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 21, 2026.