SR00516SE
Receiving inspection and modification of amilitary surplused CH-47 transmission housing P/N 114D6241-1 for replacement of the commercial Boeing transmission housing assemby P/N 234D6241-1. Held by Columbia Helicopters INC, which holds 66 approved modifications in all. Last revised May 6, 1998. System: rotorcraft systems.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Columbia Helicopters Inc.
- Models
- 234
- Type certificate
- H9EA
- 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.