SA1398SO
Remove drain plug AN-806-6 from fuel line drain in belly of aircraft and replace with drain valve MT-101-1. (See limitations). Held by Saf-Air Products INC., which holds 10 approved modifications in all. Last revised July 15, 2019. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company; The Cessna Aircraft Company
- Models
- 150C, 150B, 150D, 150, 150A, 150E, 140A
- Type certificates
- 3A19, 3A19, 3A19, 3A19, 3A19, 3A19, 5A2
- On this site
- Cessna 140 1,838 registered
Cessna 150 7,995 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 12, 2026.