NTSB CAROL · Event
Event LAX88LA059
Registry · N77DJ
FAA Aircraft Registry record.
Make / Model
CIRRUS DESIGN SF50
Year of manufacture
2021
Engine
WILLIAMS FJ33-5A
Seats / Engines
7 seats · 1 engine
Last airworthiness date
20211209
ADS-B equipped
Yes — Mode-S AA6702
Registrant of record
CONNELL BLUE LLC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
PILOT FAILURE TO MAINTAIN ADEQUATE MAIN ROTOR RPM.
Factual narrative
THE PILOT, WHO WAS ALSO A CERTIFICATED AIRFRAME & POWERPLANT MECH, RECENTLY CHANGED THE TAILBOOM ASSY. AT THE TIME OF THE ACCIDENT HE WAS CONDUCTING A MAINTENANCE TEST FLIGHT. THE PILOT EXECUTED ONE AUTOROTATION WITH A POWER RECOVERY. THE PLT REENTERED THE TRAFFIC PATTERN. GND WITNESSES REPTD THAT WHEN THE HELICOPTER ENTERED THE BASE LEG THEY HEARD AN EXPLOSIVE SOUND FOLLOWED BY THE TAILBOOM ASSY SEPARATING FROM THE HELICOPTER. THE WRECKAGE EXAM DSCLSD THE MAIN ROTOR BLADE STRUCK THE TAILBOOM. THE TAIL ROTOR BLADES WENT OUT OF TRACK AND STRUCK THE VERTICAL FINS, SEPARATING THE UPPER VERTICAL FIN. NO EVIDENCE OF ANY PREEXISTING MALFUNCTIONS WAS FOUND. THE MAIN ROTOR BLADES EXHIBITED LOW ROTOR RPM DAMAGE. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1987_LAX88LA059.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 ↗