# N233CH: Boeing-Vertol 234LR

- Status: Valid registration
- Airframe: [Boeing-Vertol 234LR](https://openairdocs.org/model/boeing-vertol-234lr) (registry code 1385049, 35 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: MM820
- Type: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Standard
- Airworthiness date: February 18, 1985
- Certificate issued: October 6, 2016
- Expires: October 31, 2029
- Mode S code: A213DF
- 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=233CH
- Page: https://openairdocs.org/aircraft/N233CH

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): 0 in force

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

None in force.

### Matched by engine (Lycoming AL5512)

None in force.

## Information bulletins (advisory)

None matched.

## NTSB investigations

None matched to N233CH.

## FAA accident and incident reports

None matched to N233CH.

## Reports on N233CH not matched to an aircraft (1)

They name N233CH, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [Incident 19920105002159I](https://openairdocs.org/incident/19920105002159I), Jan 5, 1992: Saab 340B (N233CH), Lynchburg, VA. Crew advised of bomb threat while taxiing for takeoff. Passengers evacuted. No bomb. Passenger made offhand remark.

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## Service difficulty reports on N233CH not matched to an aircraft (7)

They name N233CH, but no registry record covers the date, the aircraft registered then was built later, or the report describes another aircraft.

- [SDR MALA976329](https://openairdocs.org/sdr/MALA976329), Jan 28, 1999: VALVE. FAILED. BLEED FAULT ILLUMINATED AFTER TAKEOFF ON RIGHT ENGINE, COMPLETED QRH AND BLEED FAULT STILL ILLUMINATES. AIRCRAFT RETURNED TO DTW. MAINTENANCE REPLACED PRESSURE 
- [SDR MALA976292](https://openairdocs.org/sdr/MALA976292), Jan 10, 1999: LIGHT. LOOSE. EMERGENCY LIGHT PANEL ABOVE SEATS 3 C AND D CAME LOOSE ON TAKEOFF AND LANDING. MAINTENANCE RESECURED PANEL.
- [SDR MALA976232](https://openairdocs.org/sdr/MALA976232), Nov 8, 1998: AHRS. FAILED. IN FLIGHT THE LEFT AHRS FAILED. AIRCRAFT RTURNED TO MSP. MAINTENANCE REPLACED LEFT AHRS COMPUTER. NR 1 AHRS TESTS GOOD IAW SAAB MM.
- [SDR MALA976219](https://openairdocs.org/sdr/MALA976219), Oct 18, 1998: ASI. FAILED. CAPTAIN'S AIRSPEED INDICATOR FROZE UP AFTER TAKEOFF, STUCK UNTIL AFTER LANDING. RETURNED TO MSP. MAINTENANCE REPLACED THE LEFT ASI. OPS CHECK GOOD.
- [SDR MALA976185](https://openairdocs.org/sdr/MALA976185), Aug 15, 1998: INDICATOR. STICKING. EN ROUTE, RIGHT PROP OIL TEMP INDICATOR ROSE TO 100 DEGREES, RETURNED TO MSP. MAINTENANCE REPLACED RT PGB OIL PSI/TEMP INDICATOR. GROUND RUNS AND OPS GOOD.
- [SDR PLGA970211A](https://openairdocs.org/sdr/PLGA970211A), Feb 11, 1997: UPLOCK ACTUATOR. MALFUNCTIONED. BGR - FLT 4415 - AFTER TAKEOFF, THE LEFT MLG WOULD NOT LOCK UP AFTER RETRACTION. AIRCRAFT RETURNED TO BGR AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED LEFT
- [SDR PLGA970117](https://openairdocs.org/sdr/PLGA970117), Jan 17, 1997: SELECTOR. MALFUNCTIONED. BTV - FLT 4508 - AFTER TAKEOFF LANDING GEAR FAILED TO RETRACT WHEN SELECTED UP. GREEN GEAR DOWN AND LOCKED LIGHTS REMAINED ON. AIRCRAFT RETURNED TO BTV AND LAND

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Related

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

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