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NTSB Report
February 7, 1986 · Cessna TU206G · N5340X
Flagstaff, AZ
Overview
Report Status
Preliminary report
Event Type
Accident
Date
February 7, 1986
Injury Outcomes
No injuries (6 uninjured)
Location
Flagstaff, AZ
Aircraft
Cessna TU206G
Tail Number
N5340X
Operator
Superstition Air Service
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX86LA112
WHILE RETURNING FROM GRAND CANYON, AZ, 14 CFR 135 SIGHTSEEING FLT TO SCOTTSDALE, AZ, THE PLT REPORTED THE ACFT EXPERIENCED A POWER LOSS; ALL OTHER INSTRUMENT INDICATIONS WERE NORMAL. THE PLT ENRICHED THE MIXTURE AND CHANGED FUEL TANKS BUT TO NO AVAIL. THE PLT ELECTED TO DIVERT TO PULLIAM ARPT (FLG), FLAGSTAFF, AZ. AFTER TURNING THE ACFT TOWARDS FLG SMOKE BEGAN TO ENTER THE CABIN AREA FROM BENEATH THE INST PANEL. AFTER SECURING ALL ELECTRICAL POWER THE SMOKE DIMINISHED MOMENTARAILY. SHORTLY THEREAFTER THE ENGINE BEGAN TO LOSE MORE POWER AND THE CABIN BEGAN TO FILL UP WITH SMOKE. THE PILOT ELECTED TO LAND IN AN OPEN FLD. DURING THE LANDING ROLL, THE ACFT STRUCK 3 FENCE LINES AND A DIRT EMBANKMENT. EXAM OF THE ENGINE DSCLSD THE NO. 1 CYLINDER AFT ATTACH EXH STUDS HAD SHEARED OFF AND THE FWD STUDS ATTACH NUTS WERE LOOSE.
Full Narrative
WHILE RETURNING FROM GRAND CANYON, AZ, 14 CFR 135 SIGHTSEEING FLT TO SCOTTSDALE, AZ, THE PLT REPORTED THE ACFT EXPERIENCED A POWER LOSS; ALL OTHER INSTRUMENT INDICATIONS WERE NORMAL. THE PLT ENRICHED THE MIXTURE AND CHANGED FUEL TANKS BUT TO NO AVAIL. THE PLT ELECTED TO DIVERT TO PULLIAM ARPT (FLG), FLAGSTAFF, AZ. AFTER TURNING THE ACFT TOWARDS FLG SMOKE BEGAN TO ENTER THE CABIN AREA FROM BENEATH THE INST PANEL. AFTER SECURING ALL ELECTRICAL POWER THE SMOKE DIMINISHED MOMENTARAILY. SHORTLY THEREAFTER THE ENGINE BEGAN TO LOSE MORE POWER AND THE CABIN BEGAN TO FILL UP WITH SMOKE. THE PILOT ELECTED TO LAND IN AN OPEN FLD. DURING THE LANDING ROLL, THE ACFT STRUCK 3 FENCE LINES AND A DIRT EMBANKMENT. EXAM OF THE ENGINE DSCLSD THE NO. 1 CYLINDER AFT ATTACH EXH STUDS HAD SHEARED OFF AND THE FWD STUDS ATTACH NUTS WERE LOOSE.
Flight
Event TypeAccident
Event Time16:00 MST
Nearest AirportPULLIAM (15nm W)
Runway0
Flight Plan FiledNone
Aircraft FireIflt
Aircraft ExplosionNo
Aircraft
AircraftCessna TU206G
Tail NumberN5340X
Aircraft CategoryAir
DamageSubstantial
OperatorSuperstition Air Service
Operating RulePart 135
Engines1
Engine TypeReciprocating
Engine DetailsContinental · TSIO-520-M · Reciprocating · 310
Seats6
People & Injuries
Injury SummaryNo injuries (6 uninjured)
Fatal0
Serious0
Minor0
Uninjured6
Total6
Crew 1Age 24 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind180° @ 9 kt
Visibility20 sm
CeilingNone
Temperature / Dew Point30 C / 18 C
Altimeter29.00 inHg
Observation Time22:55
Weather SourceWFAC