SR00925DEAvionics
Installation of Garmin GTX 335/335R and GTX345/345R transponders to provide ADS-B Out and In functionality.
FAA holder: Peregrine
Aircraft STC directory
Columbia Helicopters 234 STCs
The Jun 30, 2026 FAA DRS snapshot contains 6 selected supplemental type certificates with status Current whose public applicability data names the Columbia Helicopters 234. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.
6
listed Current at snapshot
2
holder directories
5
modification categories
Mar 24, 2020
latest recorded revision
Modification demand surface
Rotorcraft modifications2
Avionics1
Fuel systems1
Engine and powerplant1
Cabin and interiors1
Recorded holders
Recently revised 234 STCs
Showing the 6 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.
View record
SR02670SEFuel systems
Installation of Simplex Model 347 Fire Fighting Tank System (FFTS); Serial Number MJ022.
FAA holder: Columbia Helicopters Inc
SH5762NMEngine and powerplant
Installation of Advanced Technology Aircraft Company engine barrier filter in accordance with Advanced Technology Aircraft Company Master Drawing List No. 234, Revision C, dated August 17, 1992, or later FAA approved revisions. This STC is issued for use in the restricted category only, and the rotorcraft must be operated accordingly with the ATAC engine barrier filter installed.
FAA holder: Waukena Flying Services Inc.
SH5685NMRotorcraft modifications
Installation of an improved N2 Control System in accordance with Columbia Helicopters, Inc. (CHI) Master Drawing List 93-AVI-0304, Revision H, dated August 12, 2011, or later FAA-approved revision.
FAA holder: Columbia Helicopters Inc
SR01041SECabin and interiors
Modification and installation of the Columbia Helicopters, Inc. C34E2057 Utility Interior Configuration, 1-19 Passengers, in accordance with Columbia Helicopters, Inc. (CHI) Master Drawing List No. 01-RDE-0602, Revision A, dated January 14, 2002, or later FAA approved revision. The modified interior will be maintained in accordance with Columbia Helicopter's FAA approved Model 234 manual, Continuous Airworthiness Maintenance Program.
FAA holder: Columbia Helicopters Inc
SR00841SERotorcraft modifications
Replacement of Boeing forward (P/N's 114D1245-7 or -8) and aft (P/N's 114D1350-1, -2, or -3) main rotor masts with Columbia Helicopter main rotor mast P/N's C34D5003-1 and C34D6002-9, respectively.
FAA holder: Columbia Helicopters Inc