LAX98LA065
1997-12-30 · VAN NUYS, California, United States · None · 1 aircraft · Status: Completed
Airport VNY
Aircraft involved
Probable cause & findings
The student and flight instructor's failure to verify that the landing gear was in the down position, and the design of the electrical system in which a single-point aircraft system malfunction (one open circuit breaker) disabled both the landing gear warning system and the main gear downlock switches.
Factual narrative
On December 30, 1997, at 1400 hours Pacific standard time, a Cessna 172RG, N5404V, was substantially damaged during landing with the gear partially extended at the Van Nuys, California, airport. There were no injuries to the flight instructor or student pilot. The flight departed Van Nuys on a local instructional flight and no flight plan was filed. Visual meteorological conditions prevailed for the personal flight. The flight instructor stated in his report of accident that the student pilot had extended the landing gear on the downwind leg of the traffic pattern, but then retracted it after being told to go around by the control tower. On the second downwind leg, the student again placed the gear switch in the down position; however, neither the student pilot nor the instructor visually verified that the gear was down and locked. During the final flare for landing, the instructor noted that the gear was not down and that the 5 amp gear warning circuit breaker had opened. He then closed the circuit breaker and noted the gear starting to extend but it had achieved only an intermediate position at the time of touchdown. The airplane subsequently settled on to the runway and incurred damage to the underside, the right wing, and the right horizontal stabilizer. A review of the Cessna 172RG Service Manual, Drawing No. 2471000, "Wiring Diagram-Landing Gear System" indicated that subject circuit breaker, in addition to providing power to the gear indicator lights and warning horn, also powers the main gear downlock switches and the stall warning horn. This was verified by a telephone conversation with the Cessna Aircraft Engineering Department. The flight instructor stated that the student pilot had extended the landing gear on the downwind leg of the traffic pattern, but then retracted it after being told to go around by the control tower. On the second downwind leg, the student again placed the gear switch in the down position; however, neither the student nor the instructor visually verified that the gear was down and locked. During the final flare for landing, the instructor noted that the gear was not down and that the 5 amp gear warning circuit breaker had opened. He then closed the circuit breaker and noted the gear starting to extend, but it had achieved only an intermediate position at the time of touchdown. The airplane subsequently settled on to the runway and incurred damage to the underside, the right wing, and the right horizontal stabilizer. A review of the Cessna 172RG Service Manual, Drawing No. 2471000, 'Wiring Diagram-Landing Gear System' indicated that subject circuit breaker, in addition to providing power to the gear indicator lights and warning horn, also powers the main gear downlock switches and the stall warning horn. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1997_LAX98LA065.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
Search this event elsewhere
External sources are reported, not agency: signal that something happened, not fact about what happened.
- TallyAero Live Wire Aviation press
- NTSB CAROL Agency ↗
- NTSB Docket Agency ↗
- Aviation Safety Network Aviation press ↗
- Kathryn's Report Aviation press ↗
- Aviation Herald Aviation press ↗
- AVweb Aviation press ↗
- Pilots of America Community ↗
- Reddit /r/flying Community ↗
- FlightAware Aviation press ↗
- AOPA accident database Aviation press ↗
- Google News News ↗
- DuckDuckGo News ↗
Related research
Matched on aircraft type or causal vocabulary (stall). All research papers
- 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 …
- arXiv 2023 · arXiv preprint Automating Bird Diverter Installation through Multi-Aerial Robots and Signal Temporal Logic Specifications
This paper tackles the task assignment and trajectory generation problem for bird diverter installation using a fleet of multi-rotors.
- arXiv 2023 · arXiv preprint Variation of Critical Crystallization Pressure for the Formation of Square Ice in Graphene Nanocapillaries
Two-dimensional square ice in graphene nanocapillaries at room temperature is a fascinating phenomenon and has been confirmed experimentally.
- arXiv 2023 · arXiv preprint Polycrystallinity enhances stress build-up around ice
Damage caused by freezing wet, porous materials is a widespread problem, but is hard to predict or control. Here, we show that polycrystallinity makes a great difference to the stress build-up process…
- arXiv 2022 · arXiv preprint Enhanced Prediction of Three-dimensional Finite Iced Wing Separated Flow Near Stall
Icing on three-dimensional wings causes severe flow separation near stall. Standard improved delayed detached eddy simulation (IDDES) is unable to correctly predict the separating reattaching flow due…
- Embry-Riddle Scholarly Commons 2021 · Journal article (JAAER) Analysis on the Negative Emotional, Physiological, and Cognitive Responses Elicited from of the Activation of a Stall Alarm
Failing to identify an aerodynamic stall can lead to the inability of an aircraft to sustain flight. To warn pilots of an impending or fully-developed stall, many aircraft have safety devices installe…