- Date
- September 6, 1974
- Place
- Grand Valley, CO · GRAND VALLEY, CO
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Takeoff
- Aircraft
- N1135WBell 47G3B1
- Status
- Completed · report November 14, 1974
- Report
- Brief approved by the director
- FAA report
- 19740906032879A
- Case key
- 138764
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 ---------------------------------------------------------------------------------------------------------------------------- 3-3319 74/9/6 NR.GRAND VALLEY,COLO BELL 47G3B1 CR- 0 0 1 NONCOMMERCIAL COMMERCIAL, FL.INSTR., TIME - 0730 N1135W PX- 0 0 0 PLEASURE/PERSONAL TRANSP AGE 52, 11500 TOTAL DAMAGE-SUBSTANTIAL OT- 0 0 0 HOURS, 4700 IN TYPE, NOT INSTRUMENT RATED. NAME OF AIRPORT - PRIVATE HELI PAD DEPARTURE POINT INTENDED DESTINATION GRAND VALLEY,COLO MONTROSE,COLO TYPE OF ACCIDENT PHASE OF OPERATION MISCELLANEOUS TAKEOFF: VERTICAL COLLISION WITH GROUND/WATER: CONTROLLED LANDING: LEVEL OFF/TOUCHDOWN PROBABLE CAUSE(S) ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: CLUTCH ASSEMBLY MISCELLANEOUS ACTS,CONDITIONS - EXCESSIVE-WEAR/PLAY PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT. REMARKS- TOO LOW FOR AUTOROTATION.CLUTCH LINING EXCESSIVLY WORN.NO OIL IN TANK.
Aircraft
- Registration
- N1135W
- Reported as
- Bell 47G3B1
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Substantial damage
- Airport
- Private Heli Pad
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 N1135W · 3
Matched to the same aircraft by N-number and date.