The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · issued

SA5944NM

Replace Lycoming model GSO-480-A246 engine with Lycoming model GSO-480-B2C6. Held by Aero Air INC, which holds 4 approved modifications in all. Last revised May 7, 1993. System: engine.

What it applies to

Kind of product
Aircraft
Design holder
Piaggio & C.
Models
P.136-L2
Type certificate
A-813
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.