- Date
- September 9, 1974
- Place
- Ripon, CA · RIPON, CA
- Injuries
- 2 fatal, 1 serious
- Damage
- Destroyed
- Phase of flight
- Enroute
- Aircraft
- N3072GBell 47J-2A
- Status
- Completed · report March 4, 1975
- Report
- Brief approved by the director
- FAA report
- 19740909043559A
- Case key
- 138630
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 ---------------------------------------------------------------------------------------------------------------------------- 3-4207 74/9/9 RIPON,CALIF BELL 47J-2A CR- 0 1 0 COMMERCIAL COMMERCIAL, FL.INSTR., TIME - 1012 N3072G PX- 2 0 0 MAPPING/PHOTO AGE 32, 4700 TOTAL HOURS, DAMAGE-DESTROYED OT- 0 0 0 124 IN TYPE, NOT INSTRUMENT RATED. DEPARTURE POINT INTENDED DESTINATION STOCKTON,CALIF NEW MELONE DAM,CALIF TYPE OF ACCIDENT PHASE OF OPERATION PROPELLER/ROTOR FAILURE: TAIL ROTOR IN FLIGHT: NORMAL CRUISE COLLISION WITH GROUND/WATER: UNCONTROLLED LANDING: POWER-ON LANDING PROBABLE CAUSE(S) ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR DRIVE SHAFT ASSEMBLY MISCELLANEOUS ACTS,CONDITIONS - LACK OF LUBRICATION-SPECIFIC PART,NOT SYSTEM PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION FACTOR(S) PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING FIRE AFTER IMPACT REMARKS- TAIL ROTOR DRIVE SPLINED COUPLING FAILED.ACFT SPUN TO R AT LOW ALT.
Aircraft
- Registration
- N3072G
- Reported as
- Bell 47J-2A
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Destroyed
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 N3072G · 1
Matched to the same aircraft by N-number and date.