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NTSB Report
May 9, 1982 · Beech 35-B33 · N969H
Herndon, VA
Overview
Report Status
Preliminary report
Event Type
Accident
Date
May 9, 1982
Injury Outcomes
No injuries (5 uninjured)
Location
Herndon, VA
Aircraft
Beech 35-B33
Tail Number
N969H
Operator
Butler Clifford Guy Jr
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ATL82DA127
FOLLOWING AN ENGINE FAILURE, THE PILOT HAD A LIMITED CHOICE OF TERRAIN FOR LANDING. HE LANDED HARD AND SLID INTO TREES. A METALLURGICAL EXAMINATION REVEALED THAT THE SHAFT ON THE ENGINE OIL PUMP DRIVE GEAR, PN 538609, HAD FAILED FROM FATIGUE. EVIDENCE OF HEAVY WEAR OF THE SHAFT WAS FOUND WHICH COINCIDED WITH A FOREIGN METALLIC SMEAR (ALUMINUM) ON THE SURFACE OF THE OIL REVEALED NO CONTAMINATION. AN EXAMINATION OF THE ENGINE LOG REVEALED THAT THE ENGINE HAD RECEIVED MAJOR REPAIR ON SEVERAL OCCASIONS, ONCE FOR A BROKEN PISTON.
Full Narrative
FOLLOWING AN ENGINE FAILURE, THE PILOT HAD A LIMITED CHOICE OF TERRAIN FOR LANDING. HE LANDED HARD AND SLID INTO TREES. A METALLURGICAL EXAMINATION REVEALED THAT THE SHAFT ON THE ENGINE OIL PUMP DRIVE GEAR, PN 538609, HAD FAILED FROM FATIGUE. EVIDENCE OF HEAVY WEAR OF THE SHAFT WAS FOUND WHICH COINCIDED WITH A FOREIGN METALLIC SMEAR (ALUMINUM) ON THE SURFACE OF THE OIL REVEALED NO CONTAMINATION. AN EXAMINATION OF THE ENGINE LOG REVEALED THAT THE ENGINE HAD RECEIVED MAJOR REPAIR ON SEVERAL OCCASIONS, ONCE FOR A BROKEN PISTON.
Flight
Event TypeAccident
Event Time12:21 EDT
Nearest AirportDulles Inter'L. Airport (0nm N)
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBeech 35-B33
Tail NumberN969H
Aircraft CategoryAir
DamageSubstantial
OperatorButler Clifford Guy Jr
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · IO-470-K · Reciprocating · 225
Seats4
People & Injuries
Injury SummaryNo injuries (5 uninjured)
Fatal0
Serious0
Minor0
Uninjured5
Total5
Crew 1Age 29 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind340° @ 17 kt
Visibility7 sm
CeilingNone
Temperature / Dew Point17 C / 0 C
Altimeter0