SH2928NM
Installation of an improved engine electrical wiring harness on Boeing Vertol 234 with Lycoming AL5512 engines. Held by Columbia Helicopters INC, which holds 66 approved modifications in all. Last revised January 4, 2007. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Boeing Defense & Space Group
- Models
- 234
- Type certificate
- H9EA
- On this site
- Boeing-Vertol 234 10 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.