FTW96TA398
1996-09-23 · HOUSTON, Texas, United States · Minor · 1 aircraft · Status: Completed
Airport HOU
N7492F has since been reassigned. It is now registered to a different aircraft (SCHWEIZER 269C, built 2008), which was not involved in this event.
Aircraft involved
Probable cause & findings
company maintenance personnel not complying with maintenance procedures and directives to inspect the helicopter's skids, which allowed the right skid to wear beyond the manufacturer's tolerances.
Factual narrative
On September 23, 1996, at 2245 central daylight time, a Hughes 269C, N7492F, owned and operated by the City of Houston, sustained substantial damage during an autorotation near Houston, Texas. The flight instructor and commercial pilot receiving instruction received minor injuries. Visual meteorological conditions prevailed for the Title 14 CFR Part 91 night instructional flight, and a flight plan was not filed. The flight originated at the Houston Hobby Airport, Houston, Texas, about 2110. The flight instructor reported that he was demonstrating an autorotation from 50 feet AGL. He initiated the autorotation to the grassy area between taxiway Foxtrot and taxiway Golf 2, just west of runway 17. The helicopter touched down with skids level and he increased the collective to keep the aircraft skids light on the ground and to maintain a straight ground track. The helicopter had traveled approximately 70 feet, and was moving at approximately 20 knots when the aircraft pitched forward and to the right. He "felt at least three severe impacts to the aircraft and then the aircraft was stopped." Examination of the helicopter by the FAA inspector and operator revealed that the left and right skid tubes were fractured, and the right skid was detached from its front and rear gear dampers. The tailboom and tail rotor were "sheared off' by the "main rotor blades." According to the FAA inspector, a "certified A&P [mechanic] failed to follow inspection procedures as outlined in [the] work card and [the] Manufacturer Maintenance Manual." According to the operator, the bottom of the right skid tube was "worn beyond the manufacturers tolerances." The flight instructor was demonstrating an autorotation from 50 feet AGL to a grassy area. The helicopter touched down with skids level and the flight instructor increased the collective to keep the aircraft skids light on the ground and to maintain a straight ground track. The helicopter had traveled approximately 70 feet, and was moving at approximately 20 knots when the aircraft pitched forward and to the right. The flight instructor 'felt at least three severe impacts to the aircraft and then the aircraft was stopped.' Examination of the helicopter revealed that the left and right skid tubes were fractured, and the right skid was detached from its front and rear gear dampers. The tailboom and tail rotor were 'sheared off' by the 'main rotor blades.' Further examination of the skids revealed that the bottom of the right skid tube was 'worn beyond the manufacturers tolerances.' According to an FAA inspector, a 'certified A&P [mechanic] failed to follow inspection procedures as outlined in [the] work card and [the] Manufacturer Maintenance Manual.' Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1996_FTW96TA398.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
Matched on aircraft type or causal vocabulary (maintenance). All research papers
- 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…
- Semantic Scholar 2026 · Article (Reliability Engineering & System Safety) Understanding human error in military aviation maintenance: The role of Performance shaping factors, cognitive workload and error orientation
- Semantic Scholar 2025 · Article (Applied Sciences) Decision-Making Framework for Aviation Safety in Predictive Maintenance Strategies
The implementation of predictive maintenance (PM) in aviation presents unique challenges due to strict safety requirements, complex operational environments, and regulatory constraints.
- Semantic Scholar 2024 · Article (Defence Science Journal) Modelling of Human Factors in Aviation Maintenance Using HFACS ME Human Factors Analysis and Classification System Maintenance Extension and Bayesian Network
Aircraft maintenance is a complex task involving a skilled human workforce, spare parts, and various other resources. Human factors are an inherent element of the human workforce.
- Embry-Riddle Scholarly Commons 2024 · Journal article (JAAER) A New Trajectory in UAV Safety: Leveraging Reinforcement Learning for Distance Maintenance Under Wind Variations
In the field of aviation, safety is a critical cornerstone, and the operation of Unmanned Aerial Vehicle (UAV) systems is deeply connected with this principle.
- Embry-Riddle Scholarly Commons 2024 · Journal article (JAAER) Low-Resource Automatic Speech Recognition Domain Adaptation – A Case-Study in Aviation Maintenance
With timeliness and efficiency being critical in the aviation maintenance industry, the need has been growing for smart technological solutions that optimize and streamline the different underlying ta…