NTSB CAROL · Event
Event LAX94LA105
Aircraft involved
Probable cause & findings
the worn/chafed landing gear wire which provided intermittent electrical power to the hydraulic 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. 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. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1994_LAX94LA105.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
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Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (icing, maintenance). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
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- Embry-Riddle Scholarly Commons 2019 · Journal article (IJAAA)
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- Embry-Riddle Scholarly Commons 2015 · Conference paper
The Implementation of Safety Management Systems in Maintenance Operations
Literature for Safety Management Systems (SMS) that apply to flight operations is abundant, but there is a limited supply of SMS-related literature for maintenance operations.
- Embry-Riddle Scholarly Commons 2026 · Journal article (IJAAA)
From Reactive to Predictive: A hybrid Trust-Mediated Adoption Framework for Data-Driven Maintenance in Distributed-Authority Aviation Environments
Modern aviation maintenance operates within increasingly data-intensive technological environments, yet the operational integration of predictive maintenance into routine decision-making remains incon…
- NASA NTRS 2026 · Contractor Report (CR)
Icing Physics Studies Using the 3D SIDRM Test Article: 2023 Icing Tests Analysis
In-flight icing is an important safety issue and is a factor that affects aircraft design and performance. Newer regulations are driving a need for improvements in airframe and engine icing simulation…
- arXiv 2025 · arXiv preprint
Multi-Agent Deep Reinforcement Learning for UAV-Assisted 5G Network Slicing: A Comparative Study of MAPPO, MADDPG, and MADQN
The growing demand for robust, scalable wireless networks in the 5G-and-beyond era has led to the deployment of Unmanned Aerial Vehicles (UAVs) as mobile base stations to enhance coverage in dense urb…
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