NTSB CAROL · Event
Event DEN85FTI02
Registry · N155LB
FAA Aircraft Registry record.
Make / Model
YAKOVLEV YAK-55M
Year of manufacture
1987
Engine
AMA/EXPR UNKNOWN ENG
Seats / Engines
1 seats · 1 engine
Last airworthiness date
20000404
ADS-B equipped
Yes — Mode-S A0DDBE
Registrant of record
MAENIUS NELSON D
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Factual narrative
THE ACFT CONTACTED A DIRT BANK DURING A FORCED LANDING IN A FIELD FOLLOWING A LOSS OF PWR SHORTLY AFTER TAKEOFF. A LANDING WAS MADE AT FORT BENTON ARPT WHERE THE ACFT WAS SERVICED WITH 11.85 GALLONS OF 100 OCT AVGAS. POST ACCIDENT EXAMINATION OF THE ACFT REVEALED WATER CONTAMINATION IN THE CARBURETOR BOWL AND FUEL SYSTEM. A 1 QT JAR WAS FILLED WITH FUEL FROM THE FUEL LINE TO THE CARBURETOR. A 17/32 INCH LAYER OF AVGAS WAS PRESENT ON TOP OF WATER WHICH FILLED THE REMAINING PORTION OF THE JAR. THE ACFT WAS REFUELED FROM AN UNDERGROUND TANK. THERE WAS NO FILTERIZATION ELEMENT ON THE REFUELING EQUIPMENT. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1985_DEN85FTI02.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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