- Date
- September 23, 1970
- Place
- Marianna, PA · MARIANNA, PA
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N4894Enstrom F-28A
- Status
- Completed · report September 6, 1971
- Report
- Brief approved by the director
- Case key
- 158943
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
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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 ---------------------------------------------------------------------------------------------------------------------------- 3-4213 70/9/23 MARIANNA,PA ENSTROM F-28A CR- 0 0 1 COMMERCIAL COMMERCIAL, AGE 25, 3747 TIME - 0740 N4894 PX- 0 0 1 CTR CARGO-D TOTAL HOURS, 410 IN TYPE, DAMAGE-SUBSTANTIAL OT- 0 0 0 NOT INSTRUMENT RATED. DEPARTURE POINT INTENDED DESTINATION WASHINGTON,PA MARIANNA,PA TYPE OF ACCIDENT PHASE OF OPERATION PROPELLER/ROTOR FAILURE: TAIL ROTOR IN FLIGHT: DESCENDING HARD LANDING LANDING: POWER-OFF AUTOROTATIVE LANDING PROBABLE CAUSE(S) ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR GEAR BOX MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: SUBSTANDARD QUALITY CONTROL PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND REMARKS- TAIL ROTOR GR BOX,POROSITY HI,HARDNESS 15PCT LWR THAN SPECIFIED.
Aircraft
- Registration
- N4894
- Reported as
- Enstrom F-28A
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Substantial damage
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.
Other investigations on N4894 · 1
Matched to the same aircraft by N-number and date.