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CHI93MA061

1993-01-02 · HIBBING, Minnesota, United States · None · 1 aircraft · Status: Completed

Airport HIB

Aircraft involved

Probable cause & findings

THE FIRST OFFICER'S FAILURE TO MAINTAIN A PROPER DESCENT RATE DURING THE LANDING, AND THE CAPTAIN'S INADEQUATE SUPERVISION BY NOT TAKING TIMELY ACTION TO ENSURE A SAFE LANDING. FACTORS WHICH CONTRIBUTED TO THE ACCIDENT WERE: THE COMPANY'S FAILURE TO PROVIDE ADEQUATE TRAINING ON THE AIRPLANE'S FLIGHT CHARACTERISTICS AND/OR HANDLING TECHNIQUES UNDER CONDITIONS OF WING ICE CONTAMINATION, THE COMPANY'S FAILURE TO ASSURE THAT BOTH PILOTS HAD RECEIVED THE CURRENT CREW RESOURCE MANAGEMENT (CRM) TRAINING, AND THE EXISTING WEATHER CONDITIONS WHICH RESULTED IN AN ACCUMULATION OF ICE ON THE AIRPLANE'S WING.

Factual narrative

DURING THE APPROACH, THE 1ST OFFICER (FO) ASKED THE CAPT IF HE WANTED TO '...POP THE BOOTS?' TO REMOVE ICE OFF THE WINGS. THE CAPT RESPONDED '...IT'S GOING TO THE HANGAR. I'LL RUN'EM ON THE GROUND...' THE FO RETARDED POWER OVER THE THRESHOLD & THE SINK RATE INCREASED; THE CAPT OBSERVED 900 FPM. THE FO APPLIED ADDITIONAL BACK PRESSURE ON THE YOKE, BUT IT WAS INADEQUATE TO ARREST THE HIGH SINK RATE. ADDITIONAL BACK PRESSURE WAS APPLIED, AND THE STALL HORN SOUNDED FOLLOWED SHORTLY THEREAFTER BY THE CAPT STATING 'I GOT IT.' DURING THE HARD LANDING THE RIGHT MAIN LANDING GEAR BROKE, THE FUEL TANK RUPTURED, AND THE RIGHT WING REAR SPAR BENT UPWARD. APRX 18 HRS AFTER THE ACCIDENT, 3/16 INCH OF RIME MIXED WITH CLEAR ICE WAS OBSERVED ON THE LEADING EDGES OF THE WING, HORIZ STAB, AND VERT STAB. THE ICE HAD FINGER-LIKE PROTRUSIONS POSITIONED VERTICALLY TO THE WING SURFACES. THE COMPANY'S LINE OPS MANUAL DOES NOT DISCUSS FLIGHT CHARACTERISTICS OR LANDING TECHNIQUES SPECIFIC TO WING ICE. NEITHER PILOT HAD RECEIVED COMPANY'S CURRENT CRM TRAINING. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1993_CHI93MA061.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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