- Date
- July 8, 1975
- Place
- Mommoth Lakes, CA · MOMMOTH LAKES, CA
- Injuries
- 3 uninjured
- Damage
- Substantial damage
- Phase of flight
- Takeoff
- Aircraft
- N1358XBell 47G3B1
- Status
- Completed · report August 15, 1975
- Report
- Brief approved by the director
- FAA report
- 19750708020039A
- Case key
- 149459
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 ---------------------------------------------------------------------------------------------------------------------------- 3-1844 75/7/8 NR.MOMMOTH LAKES,CA BELL 47G3B1 CR- 0 0 1 COMMERCIAL COMMERCIAL, AGE 29, 3277 TIME - 0815 N1358X PX- 0 0 2 CTR PASSG-D TOTAL HOURS, 483 IN TYPE, DAMAGE-SUBSTANTIAL OT- 0 0 0 NOT INSTRUMENT RATED. DEPARTURE POINT INTENDED DESTINATION MAMMOTH LAKES,CA LOCAL TYPE OF ACCIDENT PHASE OF OPERATION ENGINE FAILURE OR MALFUNCTION TAKEOFF: VERTICAL HARD LANDING LANDING: POWER-OFF AUTOROTATIVE LANDING PROBABLE CAUSE(S) POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES POWERPLANT - FUEL SYSTEM: CARBURETOR MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND REMARKS- LOW COMP NR 2 CYL VALVE SEAT LEAK. FAULTY CARB ALT COMPENSATOR.
Aircraft
- Registration
- N1358X
- Reported as
- Bell 47G3B1
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Substantial damage
N1358XRegistration cancelled Jul 13, 2017 · Bell 47G-3B-1Airframe modelBell 47G-3B-1Engine modelLycoming TVO-435-GIA
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 N1358X · 4
Matched to the same aircraft by N-number and date.
NTSB ATL90LA030Accident · Serious injuriesLimited investigationFinal reportEwell, ALThe loss of engine power, for undetermined reasons, at low altitude during a practice autorotation. Contributing to the accident was the instructor's failure to properly plan the demonstrated autorotation so as to preclude an accident, in the event that power…NTSB LAX78DUJ67Accident · No injuriesClosedWhiteriver, AZNTSB LAX76AL009Accident · Serious injuriesClosedMt.Baldy, CANTSB LAX71DUJ06Accident · No injuriesClosedElfrida, AZ