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NTSB Report
November 15, 1991 · Wsk Pzl Mielec PZL-M-18 · N4506K
Florida City, FL
Overview
Report Status
Probable Cause
Event Type
Accident
Date
November 15, 1991
Injury Outcomes
1 injury (1 minor injury)
Location
Florida City, FL
Aircraft
Wsk Pzl Mielec PZL-M-18
Tail Number
N4506K
Operator
Fable Spray Service
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
MIA92LA029
AFTER MANEUVERING, THE ENG EXPERIENCED A NEAR TOTAL LOSS OF POWER. THE PLT APPLIED FULL THROTTLE BUT THE ENG FAILED TO RESPOND. HE OPENED THE VALVE TO DUMP THE CHEMICAL & WHILE DESCENDING, THE ACFT COLLIDED WITH RISING TERRAIN. THE ACFT THEN CAME TO REST IN A FIELD. EXAM OF THE ENG ASSY REVEALED THAT THE INTAKE MANIFOLD ATTACHED TO THE BOTTOM OF THE OIL SUMP WAS LOOSE. THIS ALLOWED AN EXCESSIVELY LEAN FUEL/AIR MIXTURE WHICH WAS VERIFIED BY VISUAL EXAMINATION OF THE SPARK PLUGS. REVIEW OF THE ENG LOGBOOK REVEALED THAT THE ENG WAS INSTALLED ON APRIL 5, 1989. THERE WERE NO ENTRIES INDICATING THAT THE CARBURETOR ASSY WAS REMOVED SINCE THE ENG WAS INSTALLED.
NTSB Probable Cause
PARTIAL LOSS OF ENGINE POWER DUE TO A LOOSE INTAKE MANIFOLD. ALSO, IMPROPER MAINTENANCE BY AN UNKNOWN PERSON.
Full Narrative
AFTER MANEUVERING, THE ENG EXPERIENCED A NEAR TOTAL LOSS OF POWER. THE PLT APPLIED FULL THROTTLE BUT THE ENG FAILED TO RESPOND. HE OPENED THE VALVE TO DUMP THE CHEMICAL & WHILE DESCENDING, THE ACFT COLLIDED WITH RISING TERRAIN. THE ACFT THEN CAME TO REST IN A FIELD. EXAM OF THE ENG ASSY REVEALED THAT THE INTAKE MANIFOLD ATTACHED TO THE BOTTOM OF THE OIL SUMP WAS LOOSE. THIS ALLOWED AN EXCESSIVELY LEAN FUEL/AIR MIXTURE WHICH WAS VERIFIED BY VISUAL EXAMINATION OF THE SPARK PLUGS. REVIEW OF THE ENG LOGBOOK REVEALED THAT THE ENG WAS INSTALLED ON APRIL 5, 1989. THERE WERE NO ENTRIES INDICATING THAT THE CARBURETOR ASSY WAS REMOVED SINCE THE ENG WAS INSTALLED.
Flight
Event TypeAccident
Event Time15:00 EST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftWsk Pzl Mielec PZL-M-18
Tail NumberN4506K
Aircraft CategoryAir
DamageSubstantial
OperatorFable Spray Service
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsWsk · PZL-KALISZ · Reciprocating
Seats1
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 57 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind90° @ 18 kt
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourcePILO