- Date
- February 20, 1985, 09:00 local (17:00 UTC)
- Place
- Stockton, CA
- Injuries
- 2 minor
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N4021ABell 47G-2
- Weather
- Visual (VMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- FAA report
- 19850220030789A
- Case key
- 24656
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
The eng experienced a ttl loss of pwr during cruise flt at 300-400 ft AGL. The plt performed an autorotation into a grape vineyard which resulted in substantial damage to the helicopter. Cause of the loss of pwr was not determined.
Aircraft
- Registration
- N4021A
- Reported as
- Bell 47G-2
- Category
- Helicopter
- Airframe hours
- 2,100
- Engine
- Lycoming VO-435-A1B, 200 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Business · Part 91
- Registered owner
- Robert E. Mills
- Airworthiness certificate
- Standard, Utility
- Departed
- 015 · Turlock, CA
- Destination
- SCK · Stockton, CA
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.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 39
- Certificate
- Commercial
- Airplane ratings
- Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 2, Valid Medical--no waivers/lim.
- Seat
- Left
- Flight hours
- 11,000 total · 350 in this make and model · 10,800 as pilot in command
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 330° at 25 knots, gusting 30
- Visibility
- 30 statute miles
- Lowest ceiling
- None
- Temperature
- 50 °F, dew point 30 °F
- Altimeter
- 29.00 inHg
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 N4021A · 2
Matched to the same aircraft by N-number and date.