SA226NW
Installation of a McCauley 1A175/GM8244 propeller on a Lycoming O-290-D engine. Held by Cook. William H. JR., which holds 2 approved modifications in all. Last revised October 29, 1975. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Piper Aircraft Inc.
- Models
- PA-18-125 (Army L-21A)
- Type certificate
- 1A2
- On this site
- Piper PA-18 Super Cub 3,620 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 22, 2026.