SA2334WE
Installation of Jacobs R755-A2M or R755-SM engine, JAS engine mount, Grumman SR-5404/MA96K-2 propeller and associated equipment. (A-9B RESTRICTED CATEGORY ONLY). Held by Johnston Aircraft Service, which holds 3 approved modifications in all. Last revised May 19, 1972. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Aircraft Parts & Development Corp.; Aircraft Parts & Development Corp.
- Models
- A-9, A-9B
- Type certificates
- A-758, A-758
- 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.