NTSB CAROL · Event
Event FTW95IA053
Aircraft involved
Probable cause & findings
THE FAILURE OF MAINTENANCE PERSONNEL TO FOLLOW THE TAXI CHECKLIST RESULTING IN THE HYDRAULIC PUMPS NOT BEING TURNED ON.
Factual narrative
On November 26, 1994, at 1102 central standard time, a Boeing 737-300, N14336, Continental Airlines Flight 1176, received minor damage during a ground collision at the Intercontinental Airport, Houston, Texas. The crew of 6 and 128 passengers were not injured. Visual meteorological conditions prevailed for the scheduled Title 14 CFR Part 121 flight to Chicago, Illinois. Two mechanics were repositioning a Boeing 737-200, N11244, to Continental departure gate 41. Simultaneously, Flight 1176, a Boeing 737-300, from gate 44 was under the control of the pushback team consisting of a tug driver and a wingwalker. The right wing of N11244 contacted the left outboard flap, cockpit crew, in the process of starting engine #1, felt the impact, aborted the engine start, and looked aft from the cockpit window. The passengers were deplaned out of the right forward door utilizing portable stairs. During interviews, conducted by the investigator-in-charge and the operator, with the left seat (lead) mechanic, the following information was revealed. The mechanic taxi checklist was not utilized. He was unable to verify by discussion the "ON" position of the cockpit hydraulic pump switches for the Boeing 737-200 versus the 737-300, which are not in the same sequence in the cockpit. He reported difficulty in nose wheel steering and braking with N11244. During interviews, conducted by the investigator-in-charge and the operator, with the right seat mechanic, the following information was revealed. He offered to call maintenance following an indication by the left seat mechanic of a nose wheel steering problem; however, that mechanic declined the offer. On the enclosed statements the crew and witnesses stated that the repositioning aircraft engines were at "a very high power setting" and "taxing at a high rate of speed." The hydraulic systems (enclosed report) for the nose wheel steering, the main wheel steering, the main wheel brakes, and the thrust reversers were functionally tested. It was determined by the test that 5 brake applications were available from the accumulator of the "A" hydraulic system and that 6 brake applications were available from the accumulator of the "B" hydraulic system. The nose wheel steering, the thrust reversers, and the main landing gear brakes functioned. Toxicological findings, initiated by the operator, for the mechanics and ground crew were negative. TWO MECHANICS WERE REPOSITIONING A BOEING 737-200, N11244, TO CONTINENTAL DEPARTURE GATE 41. THE LEFT SEAT MECHANIC DID NOT UTILIZE THE MECHANIC TAXI CHECKLIST. THIS MECHANIC SUBSEQUENTLY REPORTED DIFFICULTY IN NOSE WHEEL STEERING AND BRAKING. THE RIGHT SEAT MECHANIC OFFERED TO CALL MAINTENANCE; HOWEVER, THE OTHER MECHANIC DECLINED THE OFFER. AT THE TIME, FLIGHT 1176, A BOEING 737-300, N14336, FROM GATE 44 WAS UNDER CONTROL OF THE PUSHBACK TEAM. THE CREW OF THE PUSHBACK AIRPLANE AND WITNESSES REPORTED THE REPOSITIONING AIRPLANE ENGINES WERE AT 'A VERY HIGH POWER SETTING' AND 'TAXIING AT A HIGH RATE OF SPEED.' THE RIGHT WING OF AIRPLANE N11244 WAS SUBSTANTIALLY DAMAGED WHEN IT HIT THE LEFT OUTBOARD FLAP AREA OF N14336. THE HYDRAULIC SYSTEMS FOR THE NOSE WHEEL STEERING, THE MAIN WHEEL STEERING, THE MAIN WHEEL BRAKES, AND THE THRUST REVERSERS WERE FUNCTIONALLY TESTED AND FOUND OPERATIONAL. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1994_FTW95IA053.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (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.
- 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 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.
- 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…
- 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 (IJAAA)
Just Culture in Aviation: A Metaphorical Study on Aircraft Maintenance Students
Just Culture, a sub-dimension of safety culture, has been a prominent and debated topic in aviation safety in recent years.
- Embry-Riddle Scholarly Commons 2024 · Journal article (IJAAA)
Performance PRISM: A Comprehensive Framework For Performance Measurement In Aircraft Maintenance
Aircraft maintenance is governed by rigorous safety requirements and high operational complexity, demanding robust performance measurement frameworks to ensure optimal maintenance practices.
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