SA839SO
Installation of Hamilton Standard Model 12D40/6101A-10S propeller approved under STC SP830SO on Pratt & Whitney R1340-AN-1 on S3H1 engines. Held by Metropolitan Propeller Repair, INC, which holds 5 approved modifications in all. Last revised May 13, 1975. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- EMROTH Company The
- Models
- MA-1
- Type certificate
- A6PC
- 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.