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NTSB Report
May 9, 1985 · Rockwell S-2R · N8929Q
Colusa, CA
Overview
Report Status
Preliminary report
Event Type
Accident
Date
May 9, 1985
Injury Outcomes
No injuries (1 uninjured)
Location
Colusa, CA
Aircraft
Rockwell S-2R
Tail Number
N8929Q
Operator
Caldwell Flying Service
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX85LA250
DURING AN AG FLIGHT, THE ENG BEGAN TO SEVERLY BACKFIRE & LOSE POWER. THE PLT ATTEMPTED TO MAKE A FORCED LDG ON THE NEARBY DUSTER AIRSTRIP BUT HAD INSUFFICIENT ALTITUDE TO BE PROPERLY ALIGNED WITH THE RWY. THE ACFT OVERAN THE EDGE OF THE END DISCLOSED THAT ITS #9 CYK EXHAUST VALVE BOSS HAD BROKEN CAUSING VALVE ACTION TO STOP. THE ENG HAD BEEN OPERATED FOR 30 HRS SINCE RECEIVING A MOH.
Full Narrative
DURING AN AG FLIGHT, THE ENG BEGAN TO SEVERLY BACKFIRE & LOSE POWER. THE PLT ATTEMPTED TO MAKE A FORCED LDG ON THE NEARBY DUSTER AIRSTRIP BUT HAD INSUFFICIENT ALTITUDE TO BE PROPERLY ALIGNED WITH THE RWY. THE ACFT OVERAN THE EDGE OF THE END DISCLOSED THAT ITS #9 CYK EXHAUST VALVE BOSS HAD BROKEN CAUSING VALVE ACTION TO STOP. THE ENG HAD BEEN OPERATED FOR 30 HRS SINCE RECEIVING A MOH.
Flight
Event TypeAccident
Event Time13:00 PDT
Nearest AirportCLOSBY (0nm N)
Runway18
Runway Length2600 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftRockwell S-2R
Tail NumberN8929Q
Aircraft CategoryAir
DamageSubstantial
OperatorCaldwell Flying Service
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsP&W · R1340 SERIES · Reciprocating · 600
Seats1
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 37 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind180° @ 5 kt, gusting 7 kt
Visibility30 sm
CeilingNone
Temperature / Dew Point64 F / 0 C
Altimeter0
Weather SourcePILO