- Date
- July 18, 1974
- Place
- Detroit, MI · DETROIT, MI
- Injuries
- 1 minor
- Damage
- Destroyed
- Phase of flight
- Enroute
- Aircraft
- N8525FBell 47J-2A
- Status
- Completed · report July 30, 1974
- Report
- Brief approved by the director
- FAA report
- 19740718021559A
- Case key
- 128120
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
NTSB brief
NTSB’s brief of the accident, as it was printed: the coded facts, with the probable cause and factors.
---------------------------------------------------------------------------------------------------------------------------- FILE DATE LOCATION AIRCRAFT DATA INJURIES FLIGHT PILOT DATA F S M/N PURPOSE ---------------------------------------------------------------------------------------------------------------------------- 3-1927 74/7/18 DETROIT,MICH BELL 47J-2A CR- 0 0 1 COMMERCIAL COMMERCIAL, AGE 47, 8305 TIME - 2300 N8525F PX- 0 0 0 AIR TAXI-CARGO TOTAL HOURS, 50 IN TYPE, DAMAGE-DESTROYED OT- 0 0 0 NOT INSTRUMENT RATED. NAME OF AIRPORT - DETROIT CITY DEPARTURE POINT INTENDED DESTINATION PERRYSBURG,OHIO DETROIT,MICH TYPE OF ACCIDENT PHASE OF OPERATION PROPELLER/ROTOR FAILURE: TAIL ROTOR IN FLIGHT: NORMAL CRUISE COLLISION WITH GROUND/WATER: UNCONTROLLED LANDING: POWER-OFF AUTOROTATIVE LANDING PROBABLE CAUSE(S) ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR DRIVE SHAFT ASSEMBLY MISCELLANEOUS ACTS,CONDITIONS - LACK OF LUBRICATION-SPECIFIC PART,NOT SYSTEM PILOT IN COMMAND - FAILED TO MAINTAIN DIRECTIONAL CONTROL PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND REMARKS- TAIL ROTOR DRIVE SHORT SHAFT FAILED DUE TO SLIP JOINT COUPLING RUNNING DRY OF GREASE.
Aircraft
- Registration
- N8525F
- Reported as
- Bell 47J-2A
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Destroyed
- Airport
- Detroit City
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.
Other investigations on N8525F · 2
Matched to the same aircraft by N-number and date.