# N242CH: 1983 Boeing-Vertol 234

- Status: Valid registration
- Airframe: [Boeing-Vertol 234](https://openairdocs.org/model/boeing-vertol-234) (registry code 1385051, 44 seats)
- Engine: [Lycoming AL5512](https://openairdocs.org/engine/lycoming-al5512) (registry code 41581)
- Data sheets: [TCDS H9EA](https://openairdocs.org/tcds/H9EA) (Columbia Helicopters Inc.), [TCDS E4NE](https://openairdocs.org/tcds/E4NE) (Honeywell Aerospace US LLC) (OpenAirDocs)
- Serial number: MJ023
- Year built: 1983
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Multiple
- Airworthiness date: October 25, 2000
- Certificate issued: July 6, 2023
- Expires: July 31, 2030
- Mode S code: A237A7
- Registered owner: [Columbia Helicopters Inc](https://openairdocs.org/faa-owner/COLUMBIA%20HELICOPTERS%20INC)
- Location: [Aurora, OR](https://openairdocs.org/faa-place/OR/Aurora)
- Owner type: Corporation
- Owner's area on the map: 45.2403° N, 122.7936° W: Placed by OpenAirDocs at the center of ZIP code 97002, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=242CH
- Page: https://openairdocs.org/aircraft/N242CH

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 21 in force

### Matched by airframe (Boeing-Vertol 234)

- [AD 2025-07-01](https://openairdocs.org/ad/2025-07-01): Air Data Computer · Synthetic Vision Electronic Flight Information System (Arrow STC SR09595RC or ST01523WI). Effective May 15, 2025
- [AD 2024-20-05](https://openairdocs.org/ad/2024-20-05): Flight control systems · Columbia Helicopters 234 and CH-47D. Effective Oct 28, 2024
- [AD 2023-11-07](https://openairdocs.org/ad/2023-11-07): Ground Proximity System · Airbus Helicopters 47, 206, 210 and 237 more. Effective Jun 22, 2023
- [AD 2021-23-06](https://openairdocs.org/ad/2021-23-06): Rotor flight controls · Columbia Helicopters 234 and CH-47D. Effective Jan 4, 2022
- [AD 2018-16-11](https://openairdocs.org/ad/2018-16-11): Main Rotor Head · Billings Flying Service CH-47D, 234, CH-47D and 1 more. Effective Sep 17, 2018
- [AD 2014-13-04](https://openairdocs.org/ad/2014-13-04): Nacelle/Pylon Structure and Main Rotor Blades · Columbia Helicopters 234. Effective Jul 15, 2014
- [AD 2004-06-51](https://openairdocs.org/ad/2004-06-51): Upper shaft extension · Columbia Helicopters 234. Effective Jun 18, 2004
- [AD 2002-15-02](https://openairdocs.org/ad/2002-15-02): Compressor Wheels · British Aerospace Regional Jetstream Series 3101, 234, Mystere-Falcon 20 - C5 and 22 more. Effective Aug 28, 2002
- [AD 95-22-09](https://openairdocs.org/ad/95-22-09): Spiral Bevel Ring Gear Bolted Connection · Columbia Helicopters 234. Effective Dec 6, 1995
- [AD 91-03-01](https://openairdocs.org/ad/91-03-01): Rotor Blade Rod Ends · Columbia Helicopters 234. Effective Feb 14, 1991
- [AD 87-25-05](https://openairdocs.org/ad/87-25-05): Landing Gear Spindle · Columbia Helicopters 234. Effective Dec 15, 1987
- [AD 86-23-51](https://openairdocs.org/ad/86-23-51): Transmissions · Columbia Helicopters 234. Effective Jul 20, 1987
- [AD 84-10-51 R1](https://openairdocs.org/ad/84-10-51-R1): Forward Rotor Drive Shaft · Columbia Helicopters 234. Effective Jul 24, 1986
- [AD 85-23-51 R1](https://openairdocs.org/ad/85-23-51-R1): Main Rotor Head Vertical Hinge Pins Inspection · Columbia Helicopters 234. Effective Mar 31, 1986
- [AD 84-15-03](https://openairdocs.org/ad/84-15-03): Cylinders -Flight Control System · Columbia Helicopters 234. Effective Aug 3, 1984
- [AD 83-18-51 R2](https://openairdocs.org/ad/83-18-51-R2): Pitch Shafts · Columbia Helicopters 234. Effective May 31, 1984
- [AD 84-03-51](https://openairdocs.org/ad/84-03-51): Forward Main Rotor Tie Bars · Columbia Helicopters 234. Effective Mar 14, 1984
- [AD 83-16-51](https://openairdocs.org/ad/83-16-51): Main Rotor Blade Tip Cap · Columbia Helicopters 234. Effective Oct 26, 1983
- [AD 82-20-52](https://openairdocs.org/ad/82-20-52): Transmission · Columbia Helicopters 234. Effective Apr 4, 1983
- [AD 82-20-06 R1](https://openairdocs.org/ad/82-20-06-R1): Main Rotor Hubs Inspection · Columbia Helicopters 234. Effective Oct 15, 1982
- [AD T83-25-51 R1](https://openairdocs.org/ad/T83-25-51-R1): Rotor Head Horizontal Hinge Pins · Columbia Helicopters 234

### Matched by engine (Lycoming AL5512)

None in force.

### Historical (superseded or no longer in force)

- [AD 2021-23-13](https://openairdocs.org/ad/2021-23-13) (historical): Ground Proximity System · Airbus Helicopters K-225, K-190A, K-240 and 237 more. Effective Dec 9, 2021

## Information bulletins (advisory) (1 in force)

- [SAIB SW-11-03](https://openairdocs.org/saib/SW-11-03): Pitch Housings Vertical Pin Lugs. Issued Oct 22, 2010

## NTSB investigations

None matched to N242CH.

## FAA accident and incident reports

None matched to N242CH.

## Service difficulty reports (16)

As reported by operators and repair stations. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR CHIA202308076438](https://openairdocs.org/sdr/CHIA202308076438), Aug 7, 2023: BLOWER. SHORTED. DURING FLIGHT PIC/SIC NOTICED SLIGHT BURNING SMELL IN COCKPIT IN FWD FLIGHT AFTER DEPARTING DIP SITE. PIC IMMEDIATELY TURNED OFF THE HEAT VENT MASTER SWITCH, AF
- [SDR CHIA2023F00247](https://openairdocs.org/sdr/CHIA2023F00247), Aug 7, 2023: BLOWER. SHORTED. DURING FLIGHT PIC/SIC NOTICED SLIGHT BURNING SMELL IN COCKPIT IN FWD FLIGHT AFTER DEPARTING DIP SITE. PIC IMMEDIATELY TURNED OFF THE HEAT VENT MASTER SWITCH, AF
- [SDR CHIA5149](https://openairdocs.org/sdr/CHIA5149), Jul 19, 2022: TRANSMISSION. OVERTEMP. WE JUST COMPLETED ABOUT 2 HOURS ON A FIRE FIGHTING MISSION 15NM WEST OF BECIN FOREST SERVICE BASE AND WERE RETURNING TO BECIN BASE FOR FUEL. ABOUT HALF WAY BACK
- [SDR CHIA2019061413966](https://openairdocs.org/sdr/CHIA2019061413966), Jun 11, 2019: DOOR FRAME. CRACKED. DURING REMOVAL OF THE AFT EMERGENCY EXIT HATCH, FOUND CRACK AT STA 482, BL 50L, WL +50. REMOVED DAMAGED WEB, LOCATED AND INSTALLED NEW WEB P/N 145S3106-5 (PO# A
- [SDR CHIR20195273948](https://openairdocs.org/sdr/CHIR20195273948), May 27, 2019: HOUSING. CRACKED. THE MAINTENANCE CREW REMOVED THE AFT TRANSMISSION DUE TO AN OIL LEAK AND DISCOVERED A CRACKED FWD R/H MOUNT LUG. COMPONENT RECEIVED AT THIS REPAIR STATION 6/7/2
- [SDR CHIA201905273948](https://openairdocs.org/sdr/CHIA201905273948), May 27, 2019: TRANSMISSION. CRACKED. DURING RAMP CHECK, NOTICED OIL LEAK ON TOP OF AFT XMSN. SUSPECTED AFT VERTICAL SHAFT OIL SEAL. UPON REMOVAL AND FURTHER INSPECTION OF THE AFT XMSN, FOUND FWD RT
- [SDR CHIA2019022523787](https://openairdocs.org/sdr/CHIA2019022523787), Feb 22, 2019: STRUCTURE. CRACKED. FOUND CRACK IN AFT TRANSMISSION AREA DURING "A" CHECK, STA. 575, WL +36, BL 35R. REMOVED EXISTING 2 DOUBLERS, CUT OUT CRACKED AREA AND FABRICATED FILLER. FABRIC
- [SDR CHIR201806303378](https://openairdocs.org/sdr/CHIR201806303378), Jun 30, 2018: TRANSMISSION. MAKING METAL. ON DEPARTURE THE XMSN CHIP LIGHT ILLUMINATED. THE AIRCRAFT RETURNED TO THE LANDING FOR FURTHER INSPECTION, WITH NO FURTHER ISSUES. THE AFT TRANSMISSION CHIP DET
- [SDR CHIR201603312325](https://openairdocs.org/sdr/CHIR201603312325), Mar 31, 2016: MANIFOLD. LEAKING. NR 1 ENGINE FIRE WARNING IN-FLIGHT AT END OF DAYS OPERATIONS AT HOVER. MECHANIC CONFIRMED FIRE AFTER ACFT WAS SET DOWN. FIRE AT 12:00 ON TOP AND BACK OF BURNER 
- [SDR CHIR201511172182](https://openairdocs.org/sdr/CHIR201511172182), Nov 11, 2015: BOLT. BROKEN. DURING DISASSEMBLY OF COMPONENT, SCUFFING ON BOTH THE SPIRAL BEVEL GEAR AND PINION GEAR WAS NOTED. THE CUSTOMER HAD REPORTED A SINGLE BOLT BROKEN UPON ON-WING T
- [SDR CHIR2015062500001](https://openairdocs.org/sdr/CHIR2015062500001), Jun 24, 2015: HOUSING. CRACKED. A POST REPAIR FLOURESCENT PENETRANT INSPECTION WAS PERFORMED ON A PITCH HOUSING AFTER SOME MINOR BLENDING TO REMOVE PITTING. AN INDICATION OF A CRACK WAS DISCOV
- [SDR CHIR201410151754](https://openairdocs.org/sdr/CHIR201410151754), Oct 14, 2014: CASE. CRACKED. CASE ASSEMBLY AT WEB OR LINER 247 HAS INDICATION OF A CRACK APPROXIMATELY 1.5" LONG. CRACK AT HOUSING IN PREVIOUS WELD REPAIR LOCATED NEAR ROTOR BRAKE HOUSING S
- [SDR CHIR201302261206](https://openairdocs.org/sdr/CHIR201302261206), Feb 25, 2013: BEVEL GEAR. CRACKED. ENGINE TRANSMISSION SPIRAL BEVEL GEAR WAS FOUND TO BE CRACKED ACROSS GEAR TOOTH, .2500" FROM THE HEEL.
- [SDR CHIR201205212201](https://openairdocs.org/sdr/CHIR201205212201), May 21, 2012: BOLT. SHEARED. THE CONNECTING BOLT WAS REMOVED FROM THE ROTOR HEAD AND A HAIR LINE CRACK WAS FOUND UNDER THE HEAD OF THE BOLT DURING A VISUAL INSPECTION. THE CRACK WAS CONFIRM
- [SDR 2005FA0000871](https://openairdocs.org/sdr/2005FA0000871), Jun 8, 2005: ADAPTER. CRACKED. DURING OVERHAUL OF ENGINE AWN ADAPTER, NDT FOUND .450 INCH TOTAL LENGTH CRACK IN THE BOLT HOLE OF LUG NR 1. IN THE BORE OF LUG, CRACK LENGTH IS .300 OF INCH AND
- [SDR CHI2003F00002](https://openairdocs.org/sdr/CHI2003F00002), Mar 14, 2003: COMPRESSOR WHEEL. CRACKED. TWO CRACKS WERE FOUND IN THE 1ST STAGE COMPRESSOR DISC (PN210133105) DURNG AN INSPECTION. THE CRACKS ARE LOCATED IN TWO OF THE COMPRESSOR BLADE RETENTION SLOTS.

## STCs that may be installed (OpenAirDocs) (20)

Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do.

### Approved for the airframe (Boeing-Vertol 234)

- [STC SH3319NM](https://openairdocs.org/stc/SH3319NM): Installation of Precise Flight Pulselite Control Unit in the Landing /Taxi Recognition Visual Control Light system,. Precise Flight Inc
- [STC SR00925DE](https://openairdocs.org/stc/SR00925DE): Installation of Garmin GTX 335/335R and GTX345/345R transponders to provide ADS-B Out and In functionality. Peregrine
- [STC SR02670SE](https://openairdocs.org/stc/SR02670SE): Installation of Simplex Model 347 Fire Fighting Tank System (FFTS); Serial Number MJ022. Columbia Helicopters Inc
- [STC SH5762NM](https://openairdocs.org/stc/SH5762NM): 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. Waukena Flying Services Inc
- [STC SH5685NM](https://openairdocs.org/stc/SH5685NM): 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. Columbia Helicopters Inc
- [STC SR01041SE](https://openairdocs.org/stc/SR01041SE): 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. Columbia Helicopters Inc
- [STC SH2928NM](https://openairdocs.org/stc/SH2928NM): Installation of an improved engine electrical wiring harness on Boeing Vertol 234 with Lycoming AL5512 engines. Columbia Helicopters Inc
- [STC SR01674SE](https://openairdocs.org/stc/SR01674SE): Fabrication of Columbia Helicopters, Inc. (CHI) Support Assembly, part number C34D6001-9. Columbia Helicopters Inc
- [STC SR01392SE](https://openairdocs.org/stc/SR01392SE): 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. Columbia Helicopters Inc
- [STC SR00811NY](https://openairdocs.org/stc/SR00811NY): Installation of Technisonic Industries Limited TFM-138 series transceiver models. Technisonic Industries Limited
- [STC SR01834NY](https://openairdocs.org/stc/SR01834NY): Installation of Globalstar Satellite Telephone System. Atlantic Avionics Inc
- [STC SH2720SO](https://openairdocs.org/stc/SH2720SO): 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. Enviro Systems Inc
- [STC SR00955SE](https://openairdocs.org/stc/SR00955SE): 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). Columbia Helicopters Inc
- [STC SR00956SE](https://openairdocs.org/stc/SR00956SE): 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. Columbia Helicopters Inc
- [STC SR00875SE](https://openairdocs.org/stc/SR00875SE): 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. Columbia Helicopters Inc
- [STC SR00841SE](https://openairdocs.org/stc/SR00841SE): 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. Columbia Helicopters Inc
- [STC SR00516SE](https://openairdocs.org/stc/SR00516SE): Receiving inspection and modification of amilitary surplused CH-47 transmission housing P/N 114D6241-1 for replacement of the commercial Boeing transmission housing assemby P/N 234D6241-1. Columbia Helicopters Inc
- [STC SR00288SE](https://openairdocs.org/stc/SR00288SE): Modification of internal auxiliary fuel tank from a dry-cell type to a wet-cell type. Columbia Helicopters Inc
- [STC SH5973NM](https://openairdocs.org/stc/SH5973NM): Approve increased altitude and weight capability when operated in Category And B operations. Columbia Helicopters Inc
- [STC SH2930NM](https://openairdocs.org/stc/SH2930NM): Installation of an electronic weighting system. Measurement Systems Intl

## Related

- Other Boeing-Vertol 234 aircraft: https://openairdocs.org/model/boeing-vertol-234/aircraft.md
- The Lycoming AL5512 engine: https://openairdocs.org/engine/lycoming-al5512.md

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