- Date
- July 22, 1986, 04:03 local (11:03 UTC)
- Place
- Tranquility, CA
- Injuries
- 1 fatal
- Damage
- Destroyed
- Phase of flight
- Maneuvering
- Aircraft
- N4023SAyres S2R
- Weather
- Visual (VMC) · Night/dark
- Status
- Completed · report March 10, 1988
- Report
- Approved by Office Director
- FAA report
- 19860722035369A
- Case key
- 24964
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 an aerial application operation the aircraft was observed to have made a pass over the field, began turning to make another pass when a loud pop was heard. Just after the noise, witnesses observed the aircraft spin as the turn lights mounted on the wings were observed to rotate with the airplane. No preimpact mechanical malfunction/failure was found.
Aircraft
- Registration
- N4023S
- Reported as
- Ayres S2R
- Category
- Airplane
- Serial number
- R1820-004DC
- Airframe hours
- 1,448
- Engine
- Wright R-1820-97, 1,100 horsepower, reciprocating
- Damage
- Destroyed
- Fire
- On-Ground
- Flight
- Aerial application · Part 137
- Registered owner
- Grouleff Aviation Inc.
- Airworthiness certificate
- Special, Restricted (Special)
- Last inspection
- Annual · January 24, 1986 · 10 hours before
- Departed
- San Joaquin, CA
- Airport
- Western Ag Av.
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
- 37
- Certificate
- Commercial
- Airplane ratings
- Single-engine land
- Medical
- Class 2, Valid Medical--no waivers/lim.
- Seat
- Front
- Flight hours
- 4,950 total
Weather
- Conditions
- Visual (VMC) · Night/dark
- Wind
- Calm
- Lowest ceiling
- None
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.