NTSB CAROL · Event
Event ANC04LA099
Registry · N9178G
FAA Aircraft Registry record.
Make / Model
CESSNA U206G
Year of manufacture
1977 · 27 years old at event
TCDS
A4CE · CESSNA
Engine
CONT MOTOR IO 520 SERIES (285 hp)
Seats / Engines
6 seats · 1 engine
Last airworthiness date
19770425
ADS-B equipped
Yes — Mode-S ACB423
Registrant of record
URSUS AIR SERVICES
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The pilot's inadequate preflight inspection, and his failure to secure the cargo door, which resulted in the cargo door coming open during the takeoff roll.
Factual narrative
On July 29, 2004, about 1000 Alaska daylight time, a Cessna U206G airplane, N9178G, sustained substantial damage when the aft cargo door came open during the takeoff roll, and damaged the fuselage, at the Yakutat Airport, Yakutat, Alaska. The airplane was being operated by the US Department of the Interior as a visual flight rules (VFR) cross-country transportation flight under Title 14, CFR Part 91 when the accident occurred. The commercial pilot and sole passenger were not injured. Visual meteorological conditions prevailed, and a VFR flight plan was filed. During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on August 26, the director of maintenance for the operator said during an inspection of the accident airplane he discovered unreported substantial damage to the airplane's fuselage. He said he traced the damage to an incident where the aft cargo door opened during a takeoff roll, and baggage fell onto the runway. He said the pilot told him he checked the door for damage, but did not see significant damage to the fuselage. The director of maintenance said several fuselage stringers aft of the cargo door will have to be replaced. In a written statement from a US Department of the Interior investigator dated September 1, the investigator reported no mechanical deficiencies with the cargo door latching mechanism, and that he could not duplicate a way for the cargo door to inadvertently open when it was properly secured. The operator of the Title 14, CFR Part 91 flight reported that during the takeoff roll, the aft cargo door opened and struck the fuselage, which resulted in substantial damage to several fuselage stringers. The operator noted that the pilot had opened the cargo door prior to the accident flight to load equipment. Postaccident inspection by the operator's maintenance personnel disclosed no mechanical problem with the door, and the operator reported the door could not be inadvertently opened when it was properly closed and latched. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_2004_ANC04LA099.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 ↗