SA1254SW
Installation of electrothermal propeller de-icing system. Aircraft must be placarded: WARNING. THIS AIRPLANE NOT APPROVED FOR FLIGHT INTO KNOWN ICING CONDITIONS. Held by Merrell George D, which holds 2 approved modifications in all. Last revised November 22, 1998. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Piper Aircraft Inc.; Piper Aircraft Inc.
- Models
- PA-39, PA-30
- Type certificates
- A1EA, A1EA
- On this site
- Piper PA-30 Twin Comanche 879 registered
Piper PA-39 Twin Comanche C/R 82 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 20, 2026.