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MKC89FA196

1989-09-11 · BENTONVILLE, Arkansas, United States · Fatal · 1 aircraft · Status: Completed

Airport ASG

Aircraft involved

Probable cause & findings

A LOOSE OIL LINE THAT BECAME DISCONNECTED, WHEN MAINTENANCE/INSPECTION OF THE AIRCRAFT HAD NOT BEEN COMPLETED, WHICH RESULTED IN LOSS OF ENGINE OIL AND SUBSEQUENT FAILURE OF THE CONNECTING ROD FROM LACK OF LUBRICATION. A FACTOR RELATED TO THE ACCIDENT WAS: INADEQUATE SURVEILLANCE OF THE OPERATION BY COMPANY/MANAGEMENT PERSONNEL.

Factual narrative

THE PLT WAS USING A COMPANY ACFT THAT HAD BEEN SVCD WITH NEW FLEX OIL HOSES, BUT THE COMPANY MECHANIC HAD NOT COMPLETED THE INSTALLATION BEFORE LEAVING WORK FOR THE DAY. HE (THE MECHANIC) HAD DEFERRED COMPLETION OF THE WORK UNTIL THE FLWG MONDAY. RPRTDLY, A LEAK CHK OF THE OIL HOSES WAS ACCOMPLISHED BY THE PLT, BUT A LOG OF THIS WAS NOT ENTERED IN THE MAINT RECORD BEFORE THE FLT. DRG AN ILS LOC APCH, THE PLT RPRTD A LOSS OF OIL PRESSURE. SUBSEQUENTLY, A CONNECTING ROD IN THE ENG FAILED FM LACK OF LUBRICATION & THE ACFT CRASHED INTO TREES DRG AN EMERG LNDG. AN INSPN OF THE ACFT REVEALED A DISCONNECTED OIL HOSE BETWEEN 2 OIL COOLERS. THE HOSE HAD VIBRATED FREE FM A FITTING & OIL HAD BEEN PUMPED OVERBOARD. THE OTR OIL HOSES WERE STILL SECURELY FASTENED. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1989_MKC89FA196.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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