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NTSB Report
June 8, 1983 · Cessna TU206G · N732ZQ
Molina, CO
Overview
Report Status
Preliminary report
Event Type
Accident
Date
June 8, 1983
Injury Outcomes
1 injury (1 minor injury)
Location
Molina, CO
Aircraft
Cessna TU206G
Tail Number
N732ZQ
Operator
Monarch Aviation
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
DEN83LA135
THE PILOT HAD LEVELED OFF AT 17500 FT MSL WHEN THE ENGINE MADE A DETONATING SOUND AND LOST POWER. MANIFOLD PRESSURE WENT TO ABOUT 12 INCHES. FUEL PRESSURE WAS NORMAL BUT THE CYLINDER HEAD TEMPERATURE FELL RAPIDLY. AT 9000 FT MSL THE ENGINE SURGED TO ABOUT 16 INCHES OF MANIFOLD PRESSURE. WHEN THE PILOT LEANED THE MIXTURE THE ENGINE VIBRATED SEVERELY SO THE PILOT SECURED THE ENGINE. POST ACCIDENT INVESTIGATION REVEALED THAT THE RUBBER HOSE FROM THE TURBOCHARGER COMPRESSOR DUCT TO THE THROTTLE BODY DUCT HAD SEPARATED.
Full Narrative
THE PILOT HAD LEVELED OFF AT 17500 FT MSL WHEN THE ENGINE MADE A DETONATING SOUND AND LOST POWER. MANIFOLD PRESSURE WENT TO ABOUT 12 INCHES. FUEL PRESSURE WAS NORMAL BUT THE CYLINDER HEAD TEMPERATURE FELL RAPIDLY. AT 9000 FT MSL THE ENGINE SURGED TO ABOUT 16 INCHES OF MANIFOLD PRESSURE. WHEN THE PILOT LEANED THE MIXTURE THE ENGINE VIBRATED SEVERELY SO THE PILOT SECURED THE ENGINE. POST ACCIDENT INVESTIGATION REVEALED THAT THE RUBBER HOSE FROM THE TURBOCHARGER COMPRESSOR DUCT TO THE THROTTLE BODY DUCT HAD SEPARATED.
Flight
Event TypeAccident
Event Time14:18 MDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna TU206G
Tail NumberN732ZQ
Aircraft CategoryAir
DamageSubstantial
OperatorMonarch Aviation
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · TSIO-520-M · Reciprocating · 285
Seats4
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 37 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind350° @ 11 kt
Visibility50 sm
CeilingOvercast 25000 ft
Temperature / Dew Point45 C
Altimeter29.00 inHg
Observation Time20:10
Weather SourceWFAC