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CHI93FA050

1992-12-07 · KANSAS CITY, Missouri, United States · Fatal · 1 aircraft · Status: Completed

Airport MCI

Aircraft involved

Probable cause & findings

THE PILOT-IN-COMMAND'S FAILURE TO MAINTAIN A POSITIVE RATE OF CLIMB DURING A MISSED APPROACH. FACTORS WHICH CONTRIBUTED TO THE ACCIDENT WERE: INOPERATIVE GYRO INSTRUMENTS DUE TO A BROKEN VACUUM PUMP, THE DARK NIGHT, ADVERSE WEATHER CONDITIONS, AND RISING TERRAIN.

Factual narrative

EN ROUTE TO HIS DESTINATION, DURING LEVEL FLIGHT AT 9,000 FT, THE PILOT ADVISED ATC THAT HIS GYRO WAS INOPERATIVE. WHEN ASKED IF HE WOULD NEED ANY SPECIAL ASSISTANCE AT HIS DESTINATION, HE DECLINED. DURING THE ILS APPROACH HE WAS ISSUED A NEW VISIBILITY OF 1/4 MILE. HE SUBSEQUENTLY EXECUTED A MISSED APPROACH, AND WAS INSTRUCTED TO CLIMB AND MAINTAIN 2,500 FT FOR NO-GYRO VECTORS. THE AIRPLANE IMPACTED RISING TERRAIN 1/4 MILE FROM THE DEPARTURE END OF THE ILS RUNWAY. EXAM OF THE VACUUM PUMP REVEALED THAT THE ROTOR WAS BROKEN; ONE VANE WAS BROKEN, AND TWO PIECES WERE WEDGED IN ONE VANE SLOT. THE ROTOR ASSEMBLY WOULD NOT ROTATE. THE PILOT'S TOXICOLOGICAL RESULTS SHOWED 33.500 UG/ML OF ACETAMINOPHEN IN THE URINE, ALONG WITH DIPHENHYDRAMINE. THIS COMBINATION IS FOUND IN COMMON NON-PRESCRIPTION DRUGS SUCH AS 'BUFFRIN AF NITE TIME' AND 'EXCEDRIN P.M.' Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1992_CHI93FA050.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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