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NTSB Report
November 6, 1987 · Cessna 401A · N6250Q
Mobile, AL
Overview
Report Status
Preliminary report
Event Type
Accident
Date
November 6, 1987
Injury Outcomes
No injuries (4 uninjured)
Location
Mobile, AL
Aircraft
Cessna 401A
Tail Number
N6250Q
Operator
Montgomery Air Service
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ATL88LA031
THE PLT RELATED THAT HE WAS CLIMBING THROUGH 4,300 FT WHEN HE LOST THE LEFT TURBOCHARGER. HE THEN NOTED SPARKS AND THEN FIRE FROM THE ENGINE. HE SHUT OFF THE FUEL, WAITED FOR THE FIRE TO GO OUT AND FEATHERED THE PROPELLER. THE FLT WAS CONTINUED TO MONTGOMERY, AL WHERE THE ACFT WAS BASED AND A NO FLAP LANDING WAS EXECUTED. NO FURTHER PROBLEMS WERE ENCOUNTERED. INSPECTION REVEALED THAT THE COUPLING FROM THE EXHAUST TO THE WASTE GATE HAD FAILED ALLOWING EXHAUST GASES TO ESCAPE INTO THE ENGINE COWLING. ACFT DAMAGE INCLUDED ENGINE MOUNT BEAMS AND THE WING SPAR THROUGH THE ENGINE NACELLE. AD 75-23-08 R5 DOES NOT APPLY TO THE FRACTURED COMPONENT.
Full Narrative
THE PLT RELATED THAT HE WAS CLIMBING THROUGH 4,300 FT WHEN HE LOST THE LEFT TURBOCHARGER. HE THEN NOTED SPARKS AND THEN FIRE FROM THE ENGINE. HE SHUT OFF THE FUEL, WAITED FOR THE FIRE TO GO OUT AND FEATHERED THE PROPELLER. THE FLT WAS CONTINUED TO MONTGOMERY, AL WHERE THE ACFT WAS BASED AND A NO FLAP LANDING WAS EXECUTED. NO FURTHER PROBLEMS WERE ENCOUNTERED. INSPECTION REVEALED THAT THE COUPLING FROM THE EXHAUST TO THE WASTE GATE HAD FAILED ALLOWING EXHAUST GASES TO ESCAPE INTO THE ENGINE COWLING. ACFT DAMAGE INCLUDED ENGINE MOUNT BEAMS AND THE WING SPAR THROUGH THE ENGINE NACELLE. AD 75-23-08 R5 DOES NOT APPLY TO THE FRACTURED COMPONENT.
Flight
Event TypeAccident
Event Time17:55 CST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireIflt
Aircraft ExplosionNo
Aircraft
AircraftCessna 401A
Tail NumberN6250Q
Aircraft CategoryAir
DamageSubstantial
OperatorMontgomery Air Service
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsContinental · TSIO-520-E · Reciprocating · 300
Seats6
People & Injuries
Injury SummaryNo injuries (4 uninjured)
Fatal0
Serious0
Minor0
Uninjured4
Total4
Crew 1Age 68 · Second Class
Conditions
ConditionsVMC
LightDusk
WindCalm
Visibility9 sm
CeilingNone
Temperature / Dew Point57 / 19 C
Altimeter30.00 inHg
Observation Time00:55
Weather SourceWFAC