NTSB CAROL · Event
Event FTW97LA157
Aircraft involved
Probable cause & findings
The failure of the right main gear due to improper repair by the company maintenance personnel.
Factual narrative
On April 7, 1997, at 1308 central daylight time, a Beech BE-95, N2702Y, owned and operated by Stellax Inc., under Title 14 CFR Part 91, was substantially damaged when the right main landing gear did not extend and the left main gear and the nose gear collapsed during the landing roll on runway 12L at the San Antonio International Airport, San Antonio, Texas. The commercial pilot and 3 passengers were not injured. Visual meteorological conditions prevailed for the personal cross country flight and a flight plan was not filed. The flight originated at 1043 from Fort Worth, Texas. During interviews, conducted by the investigator-in-charge, the pilot reported that during the final approach for runway 12L, the right main landing gear failed to extend. The pilot initiated a go-around and performed the emergency procedure for gear extension; however, the right main gear still did not extend. During the subsequent emergency landing, the left main gear and the nose gear collapsed. The airplane departed the runway and came to rest in the grass to the side of the runway. Airport personnel reported damage to the wings and propellers. Maintenance personnel from a fixed base operator reported damage to the fuselage, wing structures, propellers, and wheel wells. Examination of the landing gear system revealed that the uplock assembly mechanism was jammed. In January 1998, the right main gear was examined by an NTSB investigator in Long Beach, California. The investigator found that the bolt which secures the release lanyard to the uplock mechanism had been installed in reverse. The nut on the bolt was on the aft side of the uplock attach point which caused interference between the nut and a metal guide shelf on the airframe. The interference was sufficient to jam the uplock in the locked position. Maintenance records, reviewed by the investigator-in-charge, revealed the right main landing gear uplock cable assembly, P/N 35-815109, was installed, connected, lubed, and safety wired, in February 1997 (tachometer time 531.0 hours, total airframe time 5,431.3 hours). The aircraft was then jacked and the gear swung to verify correct operation of [the] uplock cable and aircraft step and "all [was] found to be operating normally." During the final approach for the runway, the right main landing gear did not extend. The pilot initiated a go-around and performed the emergency procedure for gear extension; however, the right main gear still did not extend. During the subsequent emergency landing roll, the left main gear and the nose gear collapsed and the airplane departed the runway. A maintenance record entry stated that the right main landing gear uplock cable assembly, P/N 35-815109, was installed, connected, lubed, and safety wired, in February 1997 (tachometer time 531.0 hours, total airframe time 5,431.3 hours). The aircraft was then jacked and the gear swung to verify correct operation of [the] uplock cable and aircraft step and 'all [was] found to be operating normally.' Following the accident, examination of the airplane revealed that the uplock assembly mechanism was jammed. The bolt which secures the release lanyard to the uplock mechanism had been installed in reverse. The nut on the bolt was on the aft side of the uplock attach point which caused interference between the nut and a metal guide shelf on the airframe. The interference was sufficient to jam the uplock in the locked position. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1997_FTW97LA157.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 (stall, go-around, 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 2023 · Conference paper
The Value of Strong Partnerships to Build a Successful Aviation Maintenance Career Pathway Program for Transitioning Military Service Members
The aerospace industry is competing with other industries for a qualified workforce, and many of those competing industries are investing heavily in creating workforce development pipelines.
- 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 · Conference Paper
Computational Analysis of Steady State Aerodynamics of Transonic Truss-Braced Wing Configuration in Deep Stall
This study presents a computational investigation of steady state aerodynamics of the Subsonic Ultra-Green Aircraft Research (SUGAR) Transonic Truss-Braced Wing (TTBW) configuration over a wide range …
- NASA NTRS 2025 · Conference Paper
A Training Study to Improve Monitoring During A Go-Around
As part of an FAA program to improve go-around (GA) safety, we were asked to determine if we could improve the performance of the Pilot Monitoring (PM) during a GA maneuver.
- 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.
- Flight Safety Foundation 2024 · FSF / AeroSafety World
Go-Around Safety Forum Findings
Foundation Go-Around Safety Forum technical findings — examines why pilots fail to execute go-arounds when criteria are met (stabilized approach gate not met, energy state out of envelope, traffic con…
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