# Accident 19940422012699A: Bell 47D1, Marathon, FL, April 22, 1994

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: April 22, 1994, 11:28 local time
- Place: Marathon, FL
- Damage: Destroyed
- Phase of flight: Pwr Off Run Land (Autorotation
- Operating rules: General operating rules (Part 91)
- Location: 24.7097° N, 81.0805° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=24.7097&lon=-81.0805&mi=10
- Aircraft: N9660, a cancelled registration (https://openairdocs.org/deregistered/N9660-2013-05-23) (OpenAirDocs)
- Registry model: Bell 47D1 (registry code 1180802, https://openairdocs.org/model/bell-47d1) (OpenAirDocs)
- Registry engine: Franklin 6V4 series (registry code 27033, https://openairdocs.org/engine/franklin-6v4-series) (OpenAirDocs)
- Reported make and model: BELL 47D1
- Reported engine: FRNKLN 6V4200*
- People aboard: 4
- Fatal injuries: 4
- Pilot flight hours: 677 total, 93 in this make and model, 93 in the last 90 days
- NTSB investigation: [NTSB MIA94FA125](https://openairdocs.org/ntsb/MIA94FA125) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19940422012699A

## Narrative

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

LOUD BANG. PARTS CAME OFF TAIL. YAWED RIGHT. IMPACT ON ISLAND. BOUNCED INTO WATER.OVERTIME TAIL ROTOR BLADES FAILED

## 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 MIA94FA125](https://openairdocs.org/ntsb/MIA94FA125), Apr 22, 1994: Bell 47D1 (N9660), Marathon, FL, destroyed, 2 fatal. Probable cause: SEPARATION OF THE TAIL ROTOR GEARBOX AND TAIL ROTOR BLADES FOR AN UNDETERMINED REASON. FACTORS RELATED TO THE ACCIDENT WERE: FAILURE OF MAINTENANCE PERSONNEL TO FOLLOW THE PROPER MAINTENANCE…

## Other reports on N9660 (1)

Matched to the same aircraft by N-number and date.

- [Accident 19740316013369A](https://openairdocs.org/incident/19740316013369A), Mar 16, 1974: Bell 47D1 (N9660), Ochopee, FL, Substantial damage. R skid dug into gnd drg l/o.

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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