NTSB CAROL · Event
Event ERA24LA307
Registry · N9308Q
FAA Aircraft Registry record.
Make / Model
BEECH 95-B55 (T42A)
Year of manufacture
1971 · 53 years old at event
Engine
CONT MOTOR I0-470 SERIES (260 hp)
Seats / Engines
6 seats · 2 engines
Last airworthiness date
19711202
ADS-B equipped
Yes — Mode-S ACE928
Registrant of record
MT ZEPHYR ENTERPRISES LLC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
A landing with the nose gear retracted as a result of an intermittent landing gear relay.
Factual narrative
The pilot report that after a normal takeoff and landing gear retraction, he began to level the airplane at 4,500 ft above ground level when the left engine began to run rough. The pilot and pilot-rated passenger then reduced power on the left engine until the roughness abated and agreed that they should return to the departure airport. While on the downwind leg of the traffic pattern, the pilot placed the landing gear handle in the down position, but the landing gear down indication light did not illuminate. The pilot and pilot-rated passenger attempted to troubleshoot the issue before the pilot ultimately decided to attempt a manual extension of the landing gear. The pilot rated passenger then continued manual extension and was able to turn the crank approximately 50 times before it would no longer turn, and he believed it was “against the stops.” The pilot still did not observe an indication that the landing gear were extended, but decided that they needed to land as a result of the difficulty in maintaining altitude and airspeed. After touchdown on the main landing gear the nose of the airplane settled onto the runway and the airplane skidded to a stop. A bulkhead in airplane’s fuselage structure was substantially damaged during the landing. Following the accident, maintenance personnel examined the airplane and reported that their initial attempts to extend the landing gear normally were unsuccessful. After they “tapped the [landing gear] relay with a hammer” the landing gear extended and retracted normally during several test attempts. The landing gear were also successfully extended manually after the manual extension crank was turned about 10 additional times beyond where it was found following the accident. Additionally, examination of the left engine identified two oil-fouled spark plugs as likely contributors to the engine roughness reported during the accident flight. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).
- — Aircraft-Aircraft systems-Landing gear system-Gear extension and retract sys-Malfunction
Verbatim from NTSB's published report. Source file
NTSB_2024_ERA24LA307.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.
Browse the full corpus — academia portal ↗