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April 3, 1989 · Piper PA-28RT-201T PA-28RT-20 · N48DL
Alamosa, CO
Overview
Report Status
Probable Cause
Event Type
Accident
Date
April 3, 1989
Injury Outcomes
No injuries (2 uninjured)
Location
Alamosa, CO
Aircraft
Piper PA-28RT-201T PA-28RT-20
Tail Number
N48DL
Operator
Lyons Dean P
Injuries
None
Aircraft Damage
Substantial
NTSB Number
DEN89LA098
DURING FLT AT 16,000 FT, THE ENG LOST POWER & BEGAN VIBRATING. THE PLT CONTACTED ARTCC & ANNOUNCED HIS INTENTIONS TO MAKE A FORCED LANDING AT THE ALAMOSA ARPT. HOWEVER, HE WAS UNABLE TO REACH THE ARPT & SELECTED A FIELD ABOUT 1 MI AWAY.DURING THE LANDING, THE ACFT ENCTRD SVRL IRRIGATION DITCHES & THE GEAR COLLAPSED. AN EXAM REVEALED THE ENG CRANKSHAFT HAD FAILED AT THE #2 & #3 JOURNALS. THERE WAS EVIDENCE THAT THE #2 PIN HAD FAILED FROM FATIGUE, THEN THE #3 PIN FAILED FROM OVERLOAD.
NTSB Probable Cause
FATIGUE FAILURE OF THE ENGINE CRANKSHAFT. A FACTOR RELATED TO THE ACCIDENT WAS: THE TERRAIN CONDITION IN THE EMERGENCY LANDING AREA.
Full Narrative
DURING FLT AT 16,000 FT, THE ENG LOST POWER & BEGAN VIBRATING. THE PLT CONTACTED ARTCC & ANNOUNCED HIS INTENTIONS TO MAKE A FORCED LANDING AT THE ALAMOSA ARPT. HOWEVER, HE WAS UNABLE TO REACH THE ARPT & SELECTED A FIELD ABOUT 1 MI AWAY.DURING THE LANDING, THE ACFT ENCTRD SVRL IRRIGATION DITCHES & THE GEAR COLLAPSED. AN EXAM REVEALED THE ENG CRANKSHAFT HAD FAILED AT THE #2 & #3 JOURNALS. THERE WAS EVIDENCE THAT THE #2 PIN HAD FAILED FROM FATIGUE, THEN THE #3 PIN FAILED FROM OVERLOAD.
Flight
Event TypeAccident
Event Time09:40 MDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledIFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-28RT-201T PA-28RT-20
Tail NumberN48DL
Aircraft CategoryAir
DamageSubstantial
OperatorLyons Dean P
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · TSIO-360-FB · Reciprocating · 200
Seats4
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 40 · Third Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility30 sm
CeilingNone
Temperature / Dew Point64 F / 0 C
Altimeter0
Weather SourcePILO