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Atlas / NTSB / LAX89LA288

NTSB CAROL · Event

Event LAX89LA288

1989-08-26 HAWTHORNE, California, United States Airport · HHR Minor 1 aircraft Status: Completed

Registry · N59466

FAA Aircraft Registry record.

Make / Model

RYAN AERONAUTICAL ST3KR

Engine

KINNER R5 SERIES (160 hp)

Seats / Engines

2 seats · 1 engine

Last airworthiness date

19660713

ADS-B equipped

Yes — Mode-S A7AF8C

Registrant of record

CLEAR BLUE MARKETING INC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

Probable cause & findings

OIL STARVATION OF THE ENGINE DUE TO THE PILOT'S FAILURE TO TURN THE OIL TANK SUPPLY VALVE ON PRIOR TO FLIGHT.

Factual narrative

IN THE TRAFFIC PATTERN DURING AN AIRSHOW THE ENGINE BEGAN TO RUN ROUGH AND THE PILOT DETECTED A HOT OIL SMELL. SHORTLY THEREAFTER, THE ENGINE SEIZED AND THE PILOT LANDED SHORT OF THE RUNWAY IN A GRADED CONSTRUCTION AREA. AN FAA INSPECTOR MONITORING THE AIRSHOW ARRIVED IMMEDIATELY AFTER THE ACCIDENT AND FOUND THE PROPER QUANTITY OF OIL IN THE TANK AND NOTED THE OIL WAS COLD TO THE TOUCH. DETAILED EXAMINATION OF THE ENGINE REVEALED EXTENSIVE HEAT SIGNATURES, GALLING OF THE FRONT BEARING AND METAL PARTICLES DISTRIBUTED IN THE OIL SUMP; ALL CHARACTERISTICS OF OIL STARVATION. THE OIL PASSAGES AND OIL PUMP WERE NORMAL. EXAMINATION OF THE OIL TANK REVEALED THAT IT WAS EQUIPPED WITH AN OIL SHUT OFF VALVE. THE VALVE IS NORMALLY TURNED OFF AFTER EVERY FLIGHT. THE PILOT STATED THAT HE IS SURE HE TURNED THE VALVE ON PRIOR TO THE FLIGHT, HOWEVER, THE POSITION OF THE VALVE WAS NOT DOCUMENTED AT THE ACCIDENT SITE AND THE PRE IMPACT POSITION COULD NOT BE ESTABLISHED WITH CERTAINTY. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1989_LAX89LA288.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.