Event SEA85LA097

1985-04-26 MYRTLE POINT, Oregon, United States None 1 aircraft Status: Completed

Registry · N99GM

FAA Aircraft Registry record.

Make / Model

PILATUS AIRCRAFT LTD PC-12/47E

Year of manufacture

2019

Engine

P&W CANADA PT6A-67P (1272 hp)

Seats / Engines

11 seats · 1 engine

Last airworthiness date

20191210

ADS-B equipped

Yes — Mode-S ADD0EC

Registrant of record

MIDWEST JET CHARTER INC

Source: FAA Aircraft Registry (releasable master file).

Aircraft involved

N99GM Hiller 12E None

Factual narrative

DURING A CFR 137 FLIGHT A TOTAL LOSS OF POWER OCCURRED WITH AN AUDIBLE SCREECH COMING FORM THE ENGINE AREA. AUTOROTATION WAS MADE AND THE ACFT WAS LANDED INTO A HEVILY TREED AREA WITH STEEP TERRAIN. DURING ENGINE TEAR DOWN A FRACTURED IMPELLER WAS FOUND. METALLURGICAL ANALYSIS REVEALED THAT THE FRACTURED IMPELLER WAS DUE TO PROGRESSION OF A PRE-EXISTING FATIGUE CRACK IN THE IMPELLER. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12

Verbatim from NTSB's published report. Source file NTSB_1985_SEA85LA097.txt. Findings + structured fields enriched from FAA avall.mdb. Full investigation docket on data.ntsb.gov ↗.

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