SH186SW
Lycoming VO-540-B1B3 engine, transmission, Bell 47-620-600-25(or -23 modified to -25 by Bell Helicopter Co.) oil cooler, Bell47-671-036-1, and associated changes. (Eligible on skiplane version of Bell 47G-2A only.). Held by Campbell Air Service INC. Last revised January 1, 1960. System: rotorcraft systems.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Bell Helicopter Textron; Bell Helicopter Textron; Bell Helicopter Textron
- Models
- 47 Series, 47 Series, 47 Series
- Type certificates
- 2H1, 2H3, H-1
- On this site
- Bell 47 478 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 20, 2026.