# Accident 19910312021829A: Bell UH1B, Vero Beach, FL, March 12, 1991

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: March 12, 1991, 09:00 local time
- Place: Vero Beach, FL
- Airport: Private
- Damage: Substantial damage
- Phase of flight: Pwr Off Vert Land/Autorotate
- Operating rules: Agricultural (Part 137)
- Operator: COOG
- Location: 27.7208° N, 80.3908° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=27.7208&lon=-80.3908&mi=10
- Aircraft: N9687R, a cancelled registration (https://openairdocs.org/deregistered/N9687R-2017-06-30) (OpenAirDocs)
- Registry model: Bell UH-1B (registry code 1181410, https://openairdocs.org/model/bell-uh-1b) (OpenAirDocs)
- Reported make and model: BELL UH1B
- Reported engine: LYC T53L11D
- Fatal injuries: 0
- Pilot flight hours: 5,120 total, 1,420 in this make and model, 60 in the last 90 days
- NTSB investigation: [NTSB MIA91LA113](https://openairdocs.org/ntsb/MIA91LA113) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19910312021829A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

LOUD NOISE AND RIGHT YAW. AUTOROTATED INTO TREES. TAIL BOOM ATTACH BOLT STRIPPED. BOOM SHIFTED. UNCOUPLED SHAFT.

## The NTSB's investigation of this event (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 MIA91LA113](https://openairdocs.org/ntsb/MIA91LA113), Mar 12, 1991: Bell UH-1B (N9687R), Vero Beach, FL, substantial damage. Probable cause: IMPROPER MAINTENANCE ADJUSTMENT BY COMPANY MAINTENANCE PERSONNEL RESULTING IN OVERTORQUE OF A TAILBOOM ATTACH BOLT WHICH ALLOWED THE TAILBOOM TO SHIFT. THIS DISENGAGED THE TAIL ROTOR DRIVE SHAFT AT A…

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. For accidents, the NTSB's own investigation is the fuller record.

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