SA1490CH
Installation of a Sensenich 74DR-1 model propeller. Limited to Tel Continental O-300A, C-145-2, or C-145-2H, or O-300B with propeller control valve secured in closed position. Model O-300C or O-300D engines with model 530860 crankshaft installed. Maximum takeoff power limited to 125 horsepower. Held by Montague James J. Last revised August 14, 2001. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Swift Museum Foundation Inc.
- Models
- GC-1B
- Type certificate
- A-766
- 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 22, 2026.