# N840MC: Bell UH-1B, registration cancelled 1991-08-22

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: August 22, 1991
- Status when cancelled: Triennial form not returned
- Airframe: [Bell UH-1B](https://openairdocs.org/model/bell-uh-1b) (registry code 1181410)
- Serial number: 603619
- Type of aircraft: Rotorcraft
- Certificate issued: July 9, 1988
- Last registry action: June 21, 1991
- Mode S code: AB80EF
- Owner when cancelled: [Agrotors Inc](https://openairdocs.org/faa-owner/AGROTORS%20INC)
- Location: [Gettysburg, PA](https://openairdocs.org/faa-place/PA/Gettysburg)
- Owner type: Corporation
- Owner's area on the map: 39.8263° N, 77.2276° W: Placed by OpenAirDocs at the center of ZIP code 17325, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N840MC
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=840MC
- Page: https://openairdocs.org/deregistered/N840MC-1991-08-22

From the FAA registry file of November 5, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Bell UH-1B: https://openairdocs.org/model/bell-uh-1b.md

## NTSB investigations (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB ATL89DKG06](https://openairdocs.org/ntsb/ATL89DKG06), Sep 29, 1989: Bell UH-1B (N840MC), Plains, GA, destroyed, 2 fatal. Probable cause: IMPROPER MODIFICATION OF THE HELICOPTER BY THE COMPANY/OPERATOR, AND FAILURE OF THE SPRAY BOOM, WHICH RESULTED IN MAST BUMPING, AND SUBSEQUENT FAILURE OF THE MAIN ROTOR ASSEMBLY.

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 19890929037199A](https://openairdocs.org/incident/19890929037199A), Sep 29, 1989: Bell UH1B (N840MC), Plains, GA, Destroyed, 2 fatal. Helicopter came apart inflight. Found evidence of mast bumping which failed main rotors.

## Other aircraft with N840MC

- [Registered now](https://openairdocs.org/aircraft/N840MC): Cessna 172S, S/N 172S10440, built 2007

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