STC SH657NW
FAA DRS lists SH657NW as Current · Reissued, held by Siam Hiller Holdings Inc, for Bell Helicopter Textron 47G-2A, Bell Helicopter Textron 47G-2A-1, and Bell Helicopter Textron 47G-3B, and 7 more aircraft configurations. Recorded change: Installation of Allison 250-C18A, -C18C, -C20, -C20B engine and related changes. Snapshot dated June 30, 2026.
Recorded modification
What the FAA record covers
SH657NW identifies the approval, recorded holder, named aircraft, and modification scope. It does not confirm kit availability, serial-number effectivity, data rights, price, or installation authority.
Applicability
Aircraft named in FAA DRS
Named aircraft: Bell Helicopter Textron 47G-2A, Bell Helicopter Textron 47G-2A-1, and Bell Helicopter Textron 47G-3B, and 7 more aircraft configurations. Confirm the approved model list, serial effectivity, configuration, and certificate revision.
Related engine and powerplant STCs
FAA record reference
- STC number
- SH657NW
- Product
- Aircraft · Rotorcraft
- Country
- United States
- Application date
- November 11, 1974
- Revision date
- May 15, 2009
- CFR references
- Part 21, Part 27, Part 133