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Atlas / NTSB / LAX92FA289

NTSB CAROL · Event

Event LAX92FA289

1992-07-09 SUPERIOR, Arizona, United States Airport · E81 Fatal 1 aircraft Status: Completed

Aircraft involved

Probable cause & findings

AN INADEQUATE MAJOR ENGINE OVERHAUL PROCEDURE, DURING WHICH PREVIOUS CRANKSHAFT DAMAGE WAS NOT DETECTED. CONTRIBUTING TO THE ACCIDENT WAS A SURFACE INITIATED FATIGUE FAILURE OF THE ENGINE CRANKSHAFT.

Factual narrative

THE CERTIFICATED PRIVATE PILOT, THE SOLE OCCUPANT, WAS ON A CROSS COUNTRY BUSINESS FLIGHT WHEN THE ENGINE QUIT. THE PILOT MADE A FORCED LANDING ABOUT 250 FEET SHORT OF A DIRT AIRSTRIP. THE AIRPLANE WAS DESTROYED BY IMPACT AND A POST IMPACT FIRE, AND THE PILOT WAS FATALLY INJURED. EXAMINATION OF THE ENGINE REVEALED A BROKEN CRANKSHAFT ON THE CRANKCHEEK ADJACENT TO THE NUMBER 1 CYLINDER. THE CRANKSHAFT HAD BEEN REPLACED 42 HOURS PRIOR TO THE ACCIDENT. THE CRANKSHAFT WAS SUPPLIED FROM AN ENGINE WITH AN ACCUMULATED TOTAL TIME OF ABOUT 1,000 HOURS OF OPERATION THAT HAD PREVIOUSLY SUSTAINED A SEPARATION OF THE NUMBER 1 CYLINDER FROM THE ENGINE CASE. AFTER AN INSPECTION, THE CRANKSHAFT WAS DETERMINED TO BE SERVICEABLE AND INSTALLED IN THE ACCIDENT AIRPLANE'S ENGINE. METALLURGICAL EXAMINATION REVEALED A HIGH CYCLE FATIGUE FAILURE CONSISTENT WITH SURFACE INITIATED CRACKING. A METALLURGICAL REPORT INDICATED THAT SURFACE CRACKING WOULD NOT BE EXPECTED IN THE AREA OF FAILURE UNLESS PRIOR DAMAGE TO THE SURFACE HAD OCCURRED. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1992_LAX92FA289.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

Related research

What the literature says.

Academic papers and agency reports matching this event's aircraft type or causal vocabulary (stall). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.

Browse the full corpus — academia portal ↗