ST01920CH
Installation of modified Grumman AA-5B exhaust system assembly, P/N SUTN201 or P/N SUTN301. Only for those PA-18 series aircraft equipped with Lycoming O-320 or O-360 series engines, whether by original factory installation or by STC. Held by Professional Pilots INC., which holds 8 approved modifications in all. Last revised April 11, 2006. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.; The New Piper Aircraft Inc.
- Models
- PA-18, PA-18A, PA-18AS-125, PA-18AS-135, PA-18AS-150, PA-18S, PA-12, PA-12S
- Type certificates
- 1A2, 1A2, 1A2, 1A2, 1A2, 1A2, A-780, A-780
- On this site
- Piper/Cub Crafters PA-18 46 registered
Piper PA-12 Super Cruiser 1,247 registered
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.