SA01664SE
Installation of a Jacobs R755B2 engine, Hamilton Standard propeller with a 2B20 hub and 6135A-15 or 6135A-16 blades and associated installation components. Held by Big Sky Stearman, which holds 2 approved modifications in all. Last revised April 18, 2006. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Raytheon Aircraft Company
- Models
- E17B (Army UC-43D)
- Type certificate
- TC 641
- 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.