NTSB Identification: SEA90FA165.
The docket is stored on NTSB microfiche number 42176.
Accident occurred Sunday, August 19, 1990 in KALISPELL, MT
Probable Cause Approval Date: 10/20/1992
Aircraft: PIPER PA-30-160, registration: N8556Y
Injuries: 4 Fatal.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE PLT MADE A VFR APCH TO LND AT NGT ON RWY 31. ACCORDING TO WITNESS(ES), THERE WAS A TSTM SOUTH OF THE ARPT, BUT AT THE ARPT, THE WND WAS LGT & ONLY LGT RAIN WAS FALLING. AS THE PLT WAS LNDG, THE ACFT IMPACTED ON THE APCH END OF THE RWY, THEN BECAME AIRBORNE & IMPACTED AGAIN, FURTHER DOWN THE RWY. AN EXAM REVEALED THAT INITIAL IMPACT WAS 29' FM THE THRESHOLD. THE INITIAL SCRAPE MARK WAS ANGLED 10 DEG RIGHT OF THE RWY HDG. THERE WAS EVIDENCE THAT THE LEFT WING TIP CONTACTED THE RWY NR THE APCH END, THEN THE TIPS OF THE LEFT PROP BLADES STRUCK THE RWY. THE ACFT THEN BECAME AIRBORNE & CRASHED INVERTED AFTER TRAVELING ABOUT 613' DOWN THE RWY. THE BLADE TIPS OF BOTH PROPS WERE TWISTED & CURLED; THERE WERE SLASH MARKS ON THE RWY FROM BOTH PROPS AT THE 2ND IMPACT POINT, WHERE THE ACFT HAD IMPACTED IN AN INVERTED ATTITUDE. OF 62 RWY EDGE LGTS, 20 WERE INOP OR BROKEN & 2 WERE NOT VISIBLE DUE TO TALL VEGETATION. THE LAST RECORDED NGT TIME IN THE PLT'S LOG WAS DATED 5/5/81.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

FAILURE OF THE PILOT TO FLARE THE AIRCRAFT FOR LANDING AND TO MAINTAIN ITS CONTROL DURING THE ATTEMPTED GO-AROUND (ABORTED LANDING). FACTORS RELATED TO THE ACCIDENT WERE: DARKNESS, A NUMBER OF RUNWAY EDGE LIGHTS THAT WERE EITHER INOPERATIVE OR HIDDEN BY VEGEGATION, RAIN, REDUCED VISUAL CUES, THE PILOT'S LACK OF RECENT NIGHT FLYING EXPERIENCE, AND HIS FAILURE TO ATTAIN PROPER RUNWAY ALIGNMENT.

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