- Date
- November 19, 1970
- Place
- Grant Cove, CA · GRANT COVE, CA
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Takeoff
- Aircraft
- N7901SBell 47G3B1
- Status
- Completed · report October 8, 1971
- Report
- Brief approved by the director
- Case key
- 159611
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 ---------------------------------------------------------------------------------------------------------------------------- 3-4528 70/11/19 GRANT COVE,CALIF BELL 47G3B1 CR- 0 0 1 COMMERCIAL COMMERCIAL, AGE 37, 4554 TIME - 1415 N7901S PX- 0 0 0 CTR CARGO-D TOTAL HOURS, 2000 IN DAMAGE-SUBSTANTIAL OT- 0 0 0 TYPE, NOT INSTRUMENT RATED. DEPARTURE POINT INTENDED DESTINATION GRANT COVE,CALIF CEDAR GROVE,CALIF TYPE OF ACCIDENT PHASE OF OPERATION ENGINE FAILURE OR MALFUNCTION TAKEOFF: VERTICAL COLLISION WITH GROUND/WATER: UNCONTROLLED IN FLIGHT: UNCONTROLLED DESCENT PROBABLE CAUSE(S) POWERPLANT - MISCELLANEOUS: POWERPLANT FAILURE FOR UNDETERMINED REASONS INSTRUMENTS/EQUIPMENT AND ACCESSORIES - MISCELLANEOUS EQUIPMENT: PICK-UP EQUIPMENT MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE FACTOR(S) MISCELLANEOUS ACTS,CONDITIONS - LOAD NOT JETTISONED PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND REMARKS- LOST PWR FOR UNDET REASON.TRIED TO RELEASE SLING LOAD,SAID SWITCH MALFUNCTIONED.SLING CAUGHT ROCK.
Aircraft
- Registration
- N7901S
- Reported as
- Bell 47G3B1
- 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 N7901S · 3
Matched to the same aircraft by N-number and date.
NTSB FTW98TA099Accident · No injuriesFinal reportMagdalena, NMThe pilot's failure to maintain adequate main rotor rpm. A factor was a lack of recent experience in the type of operation being performed.NTSB LAX80DUK06Accident · No injuriesClosedSeligam, AZNTSB ANC76AA112Accident · 2 fatalClosedPetersburg, AK