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NTSB Report
August 20, 1992 · Wsk Pzl Mielec PZL-M-18 · N28951
Mattawa, WA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 20, 1992
Injury Outcomes
No injuries (1 uninjured)
Location
Mattawa, WA
Aircraft
Wsk Pzl Mielec PZL-M-18
Tail Number
N28951
Operator
B & R Aerial Crop Care
Injuries
None
Aircraft Damage
Destroyed
NTSB Number
SEA92LA184
FIFTEEN MINUTES INTO AN AERIAL APPLICATION FLIGHT THE ENGINE BEGAN RUNNING ROUGH AND BACKFIRING. THE PILOT DIVERTED TO A NEARBY AIRSTRIP AND EN ROUTE THE ENGINE CEASED OPERATING. DURING THE SUBSEQUENT FORCED LANDING THE CONVENTIONALLY GEARED AIRCRAFT NOSED OVER AS IT ROLLED OUT ON SOFT TERRAIN. EXAMINATION OF THE ENGINE REVEALED NO MECHANICAL MALFUNCTION. EXAMINATION OF THE MAIN FUEL FILTER REVEALED DEBRIS WITHIN THE FILTER CARTRIDGE AND EVIDENCE OF RUST. LIKEWISE, AN EXAMINATION OF THE CARBURETOR FUEL FILTER DISCLOSED SIMILAR INTERNAL DEBRIS BUILDUP.
NTSB Probable Cause
LOSS OF ENGINE POWER DUE TO FUEL CONTAMINATION AS A RESULT OF INADEQUATE MAINTENANCE BY THE OPERATOR. A FACTOR CONTRIBUTING TO THE ACCIDENT WAS SOFT TERRAIN.
Full Narrative
FIFTEEN MINUTES INTO AN AERIAL APPLICATION FLIGHT THE ENGINE BEGAN RUNNING ROUGH AND BACKFIRING. THE PILOT DIVERTED TO A NEARBY AIRSTRIP AND EN ROUTE THE ENGINE CEASED OPERATING. DURING THE SUBSEQUENT FORCED LANDING THE CONVENTIONALLY GEARED AIRCRAFT NOSED OVER AS IT ROLLED OUT ON SOFT TERRAIN. EXAMINATION OF THE ENGINE REVEALED NO MECHANICAL MALFUNCTION. EXAMINATION OF THE MAIN FUEL FILTER REVEALED DEBRIS WITHIN THE FILTER CARTRIDGE AND EVIDENCE OF RUST. LIKEWISE, AN EXAMINATION OF THE CARBURETOR FUEL FILTER DISCLOSED SIMILAR INTERNAL DEBRIS BUILDUP.
Flight
Event TypeAccident
Event Time18:45 PDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftWsk Pzl Mielec PZL-M-18
Tail NumberN28951
Aircraft CategoryAir
DamageDestroyed
OperatorB & R Aerial Crop Care
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsPzl-Kalisz · ASZ 621 RM18 · Reciprocating · 967
Seats1
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 48 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind70° @ 7 kt
Visibility60 sm
CeilingNone
Temperature / Dew Point48
Altimeter29.00 inHg
Observation Time01:50
Weather SourceWFAC