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Engine and powerplant

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.

FAA-listed holder
Aircraft configurations
10
FAA revision date
FAA status
Current · Reissued

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.

Buyer checks

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