NTSB CAROL · Event
Event CHI93LA321
Aircraft involved
Probable cause & findings
THE PILOT IN COMMAND NOT MAINTAINING A PROPER DESCENT RATE DURING THE FINAL APPROACH AND LANDING FLARE PHASE OF FLIGHT.
Factual narrative
On August 12, 1993, at 1610 eastern daylight time, an R.D. Bell/Pietenpol Aircamper, N194BB, registered to Robert D. Bell of Rochester Hills, Michigan, and piloted by a private pilot, was substantially damaged when its main landing gear collapsed upon touchdown onto Runway 9 Left (3,250' X 75' dry asphalt) at the Pontiac/Oakland Airport, Pontiac, Michigan. Visual meteorological conditions prevailed at the time of the accident. The 14 CFR Part 91 flight had not filed a flight plan. The pilot reported no injuries. The flight originated from Lake City, Michigan, exact time unknown. According to the pilot's on NTSB Form 6120.1/2, the airplane performed a three point landing. He stated the airplane started to drift to the right during the initial phase of the landing roll. He said he applied left rudder to get the airplane back on the runway centerline. During the airplane's return to the runway's center, the right landing gear collapsed. The on-scene investigation was conducted by Federal Aviation Administration Principle Maintenance Inspector (PMI). The PMI confirmed the right main landing gear collapse. He stated he did not observed any fatigue generated cracking on the assembly. The PMI's statement is appended to this report. The PMI stated the airplane had been involved in two previous hard landing events on July 22, 1988, and August 20, 1988. The July 22, event resulted in a collapsed right main landing gear. The logbook did not specify if the landing gear had collapsed as a result of the hard landing on August 20, 1988. Copies of the airplane logbook are appended to this report. THE HOMEBUILT AIRPLANE PERFORMED A THREE POINT LANDING ON A HARD SURFACE RUNWAY ACCORDING TO THE PILOT. DURING THE INITIAL LANDING ROLL THE AIRPLANE DRIFTED TO THE RIGHT, THE PILOT CORRECTED WITH LEFT RUDDER. DURING THE AIRPLANE'S MOVEMENT TOWARD THE RUNWAY CENTERLINE, THE RIGHT MAIN LANDING GEAR COLLAPSED. APPROXIMATELY FIVE YEARS PRIOR TO THIS EVENT, THE AIRPLANE EXPERIENCED A RIGHT MAIN LANDING GEAR COLLAPSE DUE TO A HARD LANDING. SHORTLY AFTER THE LANDING GEAR REPAIR, THE AIRPLANE EXPERIENCED A SECOND HARD LANDING. THE AIRPLANE LOGBOOK DID NOT SPECIFY IF THE LANDING GEAR ASSEMBLY HAD COLLAPSED AFTER THE SECOND HARD LANDING. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1993_CHI93LA321.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
Beyond the agency record
Search this event elsewhere.
Pre-filled searches into the sources where news + community discussion of aviation events lives. External sources are reported, not agency. Treat them as signal that something happened, not as fact about what happened.
Entity-clustered aviation events in the press — last 24 hr + 30-day archive.
Official agency record + docket.
Investigative docket: factual reports, photos, transcripts.
Long-running aviation incident database (Flight Safety Foundation).
Community NTSB synthesis blog — often has photos and witness reports.
Gold-standard aviation incident blog.
Aviation industry news search.
GA pilot forum — informed but rumor-prone.
GA pilot subreddit search.
Tail-number page — flight history (free tier limited).
AOPA Air Safety Institute search.
Mainstream press coverage. Recent events only.
Privacy-preserving news search.
External links open in a new tab. We don't ingest their content; we deep-link search queries.
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 ↗