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NTSB Report
March 11, 1988 · Piper PA-34-200T · N1555X
Lower Lake, CA
Overview
Report Status
Preliminary report
Event Type
Accident
Date
March 11, 1988
Injury Outcomes
No injuries (1 uninjured)
Location
Lower Lake, CA
Aircraft
Piper PA-34-200T
Tail Number
N1555X
Operator
Barradas Francis A
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX88LA122
DRG THE LNDG ROLL, THE LEFT MAIN LNDG GEAR COLLAPSED & THE ACFT VEERED OFF THE RWY, FURTHER DAMAGING THE AIRCRAFT. AN INVESTIGATION REVEALED THE LEFT MAIN LANDING GEAR TRUNNION HAD FAILED. IT HAD FAILED DIAGONALLY APRX 5 INCHES FROM THE BOTTOM OF THE TRUNNION & 2 INCHES BELOW THE ROTATING AXIS. A METALLURGICAL EXAM REVEALED PREEXISTING FATIGUE WHERE THE FRACTURE OCCURRED. THE TRUNNION HAD BEEN IN SVC FOR APRX 4081 HRS OF OPERATION. PIPER SVC BULLETIN #787A, DATED 8/15/85, ADDRESSED THE POSSIBILITY OF CRACKS DEVELOPING IN THE AREA OF THE FAILURE. IT RECOMMENDED THAT AFTER THE 1ST 1000 HRS IN SVC, TRUNNIONS BE INSPECTED AT INTERVALS NOT TO EXCEED 100 HRS UNTIL REPLACED. THE LAST ANNUAL INSPECTION WAS DATED 3/8/88, BUT THERE WAS NO LOGBOOK ENTRY TO INDC THE INSPECTIONS HAD BEEN COMPLETED. THE ACFT HAD FLOWN ONLY 4 HRS SINCE THE LAST INSPECTION.
Full Narrative
DRG THE LNDG ROLL, THE LEFT MAIN LNDG GEAR COLLAPSED & THE ACFT VEERED OFF THE RWY, FURTHER DAMAGING THE AIRCRAFT. AN INVESTIGATION REVEALED THE LEFT MAIN LANDING GEAR TRUNNION HAD FAILED. IT HAD FAILED DIAGONALLY APRX 5 INCHES FROM THE BOTTOM OF THE TRUNNION & 2 INCHES BELOW THE ROTATING AXIS. A METALLURGICAL EXAM REVEALED PREEXISTING FATIGUE WHERE THE FRACTURE OCCURRED. THE TRUNNION HAD BEEN IN SVC FOR APRX 4081 HRS OF OPERATION. PIPER SVC BULLETIN #787A, DATED 8/15/85, ADDRESSED THE POSSIBILITY OF CRACKS DEVELOPING IN THE AREA OF THE FAILURE. IT RECOMMENDED THAT AFTER THE 1ST 1000 HRS IN SVC, TRUNNIONS BE INSPECTED AT INTERVALS NOT TO EXCEED 100 HRS UNTIL REPLACED. THE LAST ANNUAL INSPECTION WAS DATED 3/8/88, BUT THERE WAS NO LOGBOOK ENTRY TO INDC THE INSPECTIONS HAD BEEN COMPLETED. THE ACFT HAD FLOWN ONLY 4 HRS SINCE THE LAST INSPECTION.
Flight
Event TypeAccident
Event Time17:30 PST
Nearest AirportPearce Fld (0nm N)
Runway12
Runway Length2485 ft
Runway Width50 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-34-200T
Tail NumberN1555X
Aircraft CategoryAir
DamageSubstantial
OperatorBarradas Francis A
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsContinental · TSIO-360-E · Reciprocating · 200
Seats6
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 51 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind120° @ 5 kt
Visibility50 sm
CeilingNone
Temperature / Dew Point70 F / 0 C
Altimeter30.00 inHg
Weather SourcePILO