- Date
- May 20, 1975
- Place
- Philadelphia, PA · PHILADELPHIA, PA
- Injuries
- 2 serious, 1 minor
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N1140WBell 47J-2A
- Status
- Completed · report July 28, 1975
- Report
- Brief approved by the director
- FAA report
- 19750520020229A
- Case key
- 149292
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 ---------------------------------------------------------------------------------------------------------------------------- 3-1691 75/5/20 PHILADELPHIA,PA BELL 47J-2A CR- 0 1 0 MISCELLANEOUS COMMERCIAL, AGE 30, 1187 TIME - 1045 N1140W PX- 0 1 1 HIGHWAY TRAFFIC ADVISORY TOTAL HOURS, 55 IN TYPE, DAMAGE-SUBSTANTIAL OT- 0 0 0 NOT INSTRUMENT RATED. NAME OF AIRPORT - PHILADELPHIA INTL DEPARTURE POINT INTENDED DESTINATION PHILADELPHIA,PA LOCAL TYPE OF ACCIDENT PHASE OF OPERATION ENGINE FAILURE OR MALFUNCTION IN FLIGHT: NORMAL CRUISE HARD LANDING LANDING: POWER-OFF AUTOROTATIVE LANDING PROBABLE CAUSE(S) PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE INSPECTION OF AIRCRAFT (MAINTENANCE PERSONNEL) POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES MISCELLANEOUS ACTS,CONDITIONS - IMPROPERLY INSTALLED PILOT IN COMMAND - IMPROPER LEVEL OFF COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND REMARKS- VALVE ROCKER SHAFT RETAINING PLATE NOT INSTALLED NR 6 CYL.ROCKER ARM SHAFT DISPLACED.
Aircraft
- Registration
- N1140W
- Reported as
- Bell 47J-2A
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Substantial damage
- Airport
- Philadelphia Intl
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 N1140W · 1
Matched to the same aircraft by N-number and date.