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

SA2129NM

Installation of a Lycoming O-320-E2G engine, AA-5A engine mount, cowling, air induction, and a McCauley 1C172/ SBTM/7359 propeller. Held by Air Mods NW, which holds 12 approved modifications in all. Last revised August 20, 2019. System: propeller.

What it applies to

Kind of product
Aircraft
Design holder
Tiger Aircraft LLC
Models
AA-1C
Type certificate
A11EA
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.