NTSB CAROL · Event
Event SEA93LA078
Registry · N7503L
FAA Aircraft Registry record.
Make / Model
SCHWEIZER AIRCRAFT CORP G-164B
TCDS
1A16 · ALLIED AG CAT PRODUCTIONS
Engine
P&W R1340 SERIES (600 hp)
Seats / Engines
1 seats · 1 engine
Last airworthiness date
19900921
ADS-B equipped
Yes — Mode-S AA1CD5
Registrant of record
CW EQUIPMENT RENTALS INC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
UNSUITABLE TERRAIN ENCOUNTERED DURING A FORCED LANDING AFTER AN ENGINE CYLINDER ASSEMBLY HAD SEPARATED. FACTORS INCLUDE A SNOWBANK.
Factual narrative
THE PILOT WAS RETURNING TO HIS AGRICULTURAL LANDING STRIP AFTER APPLYING DRY FERTILIZER ON A FIELD. ABOUT A MILE FROM THE RUNWAY, THE ENGINE STARTED RUNNING ROUGH. WITHIN A HALF MILE OF THE AIRPORT, THE ENGINE ROUGHNESS WORSENED TO THE POINT OF TOTAL FAILURE. THE AIRCRAFT WOULD NO LONGER MAINTAIN ALTITUDE, SO THE PILOT ATTEMPTED A FORCED LANDING IN AN ALFALFA FIELD ADJACENT TO THE RUNWAY. AFTER TOUCHDOWN, THE AIRCRAFT ROLLED INTO A SNOWDRIFT AND NOSED OVER. INVESTIGATION REVEALED THAT THE NUMBER SEVEN CYLINDER HAD SEPARATED FROM THE ENGINE CRANKCASE. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1993_SEA93LA078.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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