- Date
- January 23, 1994, 13:50 local (21:50 UTC)
- Place
- Modesto, CA
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Taxi
- Aircraft
- N1084JRockwell AC-112
- Weather
- Visual (VMC) · Day
- Status
- Completed · report November 14, 1994
- Report
- Approved by Office Director
- FAA report
- 19940123002149A
- Case key
- 28646
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
the worn/chafed landing gear wire which provided intermittent electrical power to the hydraulic pump.
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 pilot was taxiing to his hangar after practicing takeoffs and landings. While on the taxiway, the landing gear warning horn sounded and the right main landing gear light went out. Moments later, the right main landing gear collapsed. Examination of the aircraft disclosed the wiring from the right main landing gear to the hydraulic pump was worn and chafed which resulted in intermittent operation of the pump.
Factual narrative
On January 23, 1994, about 1350 hours Pacific standard time, a Rockwell Aero Commander AC-112, N1084J, right landing gear collapsed while taxiing to the hangar after landing at Harry Sham Field, Modesto, California. The pilot was completing a visual flight rules (VFR) local personal flight. The airplane, registered to and operated by the pilot, sustained substantial damage. The certificated private pilot, the sole occupant, was not injured. Visual meteorological conditions prevailed. The flight originated at Harry Sham Field at 1330 hours.
The pilot submitted a Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1/2. He indicated in the report that he made two takeoffs and landings on runway 10R. After completing the second landing, he made a right turn off the runway and taxied toward his hangar. While taxiing between 3 and 4 miles per hour, the landing gear warning horn sounded and the right main landing gear down light went out. The pilot immediately shut down the engine and then the right main landing gear collapsed.
The pilot also did not indicate in the aircraft accident report when the last annual inspection was completed. Nor did he indicate the total flight hours on the airframe and the total flight hours since the last annual inspection.
Mr. Tom Rouch, Top Gun Aviation, Inc., Harry Sham Field, said in a telephone interview conducted on June 6, 1994, that he repaired the airplane. During the maintenance repair, he found the right main landing gear wiring considerably worn and chafed. He said the wiring was the original wiring. This condition caused an intermittent operation to the hydraulic pump. During normal operation, the hydraulic pump maintains pressure to the landing gears when they are extended.
Aircraft
- Registration
- N1084J
- Reported as
- Rockwell AC-112
- Category
- Airplane
- Serial number
- 84
- Engine
- Lycoming IO-360, 200 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Personal · Part 91
- Registered owner
- King, Gregory W.
- Airworthiness certificate
- Standard, Normal
- Airport
- MOD · Harry Sham Field
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
- 47
- Certificate
- Private
- Airplane ratings
- Single-engine land
- Medical
- Class 3, Valid Medical--w/ waivers/lim
- Seat
- Left
- Flight hours
- 454 total · 150 in this make and model · 395 as pilot in command · 60 in the last 90 days · 12 in the last 30 days · 1 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- 170° at 6 knots
- Visibility
- 40 statute miles
- Lowest ceiling
- None
- Temperature
- 61 °F, dew point 46 °F
- Altimeter
- 29.00 inHg
- Observed at
- MOD
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.