SH4-235
Installed Franklin model 6V-335-A engine restricted to 200 hp. Held by Aetna Helicopters INC. Last revised June 28, 1957. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Scotts-Bell 47 Inc
- Models
- 47G
- Type certificate
- H-1
- On this site
- Bell-Carson 47 5 registered
- 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.