SA4-1238
Hamilton Standard full-feathering propellers, hubs 22D30-33 and pumps, Pesco 1E301 DE-3; Hamilton Standard 4B2-P6 governors.blades 6531A-15; feathering. Held by Ken Burnham Avn Service. Last revised January 1, 1960. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Raytheon Aircraft Company
- Models
- Army AT-11
- Type certificate
- A-2-582
- 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 20, 2026.