SH2928NMEngine and powerplant
Installation of an improved engine electrical wiring harness on Boeing Vertol 234 with Lycoming AL5512 engines.
FAA holder: Columbia Helicopters Inc
Aircraft STC directory
Boeing Defense & Space Group 234 STCs
The Jun 30, 2026 FAA DRS snapshot contains 9 selected supplemental type certificates with status Current whose public applicability data names the Boeing Defense & Space Group 234. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
9
listed Current at snapshot
3
holder directories
4
modification categories
Jan 4, 2007
latest recorded revision
Modification demand surface
Other aircraft modifications4
Rotorcraft modifications3
Engine and powerplant1
Aircraft connectivity1
Recently revised 234 STCs
Showing the 9 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
SR01674SERotorcraft modifications
Fabrication of Columbia Helicopters, Inc. (CHI) Support Assembly, part number C34D6001-9.
FAA holder: Columbia Helicopters Inc
SR01392SERotorcraft modifications
Fabrication and Installation of "Provisional Hardpoints" per Columbia Helicopter Master Drawing List, Document No. 04-RDE-0208, revision B, dated March 17, 2004, or later FAA approved revision and maintained in accordance with Instructions for Continued Airworthiness WAI0204-04, Revision 0, dated May 6, 2003, or later FAA approved revision.
FAA holder: Columbia Helicopters Inc
SR00811NYOther aircraft modifications
Installation of Technisonic Industries Limited TFM-138 series transceiver models.
FAA holder: Technisonic Industries Limited
SR01834NYAircraft connectivity
Installation of Globalstar Satellite Telephone System.
FAA holder: Atlantic Avionics Inc.
SH2720SOOther aircraft modifications
Installation of Aero Aire Model 234 Environmental Control System (ECS) in accordance with Aero Aire Master Drawing List Document No. A234R002, Revision B, dated March 7, 1990, or later FAA Approved Revision.
FAA holder: Enviro Systems Inc.
SR00955SEOther aircraft modifications
Replacement of the pilot and co-pilot cockpit doors with bubble doors in accordance with McClenahan Engineering Master Drawing List No. DM0116-3, dated June 2, 2001, or later FAA approved revision. (S/N's MJ017 and MJ022).
FAA holder: Columbia Helicopters Inc
SR00956SEOther aircraft modifications
Installation of offset cyclic and collective control sticks in accordance with McClenahan Engineering Master Drawing List No. DM0118-3, Revision A, dated July 13, 2001, or later FAA approved revision. For serial numbers MJ017 and MJ022 only.
FAA holder: Columbia Helicopters Inc
SR00875SERotorcraft modifications
Installation of Honeywell Solid State Flight Data Recorder (SSFDR) and Teledyne Digital Flight Data Acquisition Unit (DFDAU) per Columbia Helicopters, Inc., Master Drawing List 99-AVI-0221, Revision B, dated February 14, 2001, or later FAA approved revision.
FAA holder: Columbia Helicopters Inc