- Date
- December 21, 1983, 13:25 local (21:25 UTC)
- Place
- El Cajon, CA
- Injuries
- 2 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N4475Bell 47G
- Weather
- Visual (VMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- FAA report
- 19831221062989A
- Case key
- 24122
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
During a demonstration to show his student how to autorotate fm a 2 ft height AGL the instructor reduced pwr and inadvertently applied fwd cyclic. The front portion of the skids hit the gd followed by the main rotor blades. Helicopter then rocked backwards, the rear portion of the skids impacted the gd and the main rotor blades sliced through the tailboom.
Aircraft
- Registration
- N4475
- Reported as
- Bell 47G
- Category
- Helicopter
- Serial number
- 5503
- Airframe hours
- 4,124
- Engine
- Franklin 6V4-200-C32, 200 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Instructional · Part 91
- Registered owner
- Kenneth J. Tooker
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Unknown · December 10, 1983 · 11 hours before
- Airport
- SEE · Gillespie Fld
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
- 28
- Certificates
- Commercial, Flight instructor
- Airplane ratings
- Multi-engine land, Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 1, Valid Medical--no waivers/lim.
- Seat
- Right
- Flight hours
- 2,811 total · 411 in this make and model · 2,591 as pilot in command · 200 in the last 90 days · 60 in the last 30 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 220° at 10 knots
- Visibility
- 25 statute miles
- Lowest ceiling
- 4,000 ft broken
- Temperature
- 61 °F
- Altimeter
- 30.00 inHg
- Observed at
- SEE
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 N4475 · 1
Matched to the same aircraft by N-number and date.