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NTSB Report
January 2, 1993 · Piper PA-30 · N7712Y
Crossville, TN
Overview
Report Status
Probable Cause
Event Type
Accident
Date
January 2, 1993
Injury Outcomes
No injuries (1 uninjured)
Location
Crossville, TN
Aircraft
Piper PA-30
Tail Number
N7712Y
Operator
Upchurch Cornell P
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ATL93LA049
ABOUT 30 MINUTES INTO THE LOCAL FLIGHT, THE PRIVATE PILOT REPORTED THAT TOTAL ELECTRICAL POWER WAS LOST. HE COULD NOT LOWER THE FLAPS, AND WHEN HE LOWERED THE GEAR HANDLE, NO GREENS LIGHTS ILLUMINATED. HE ELECTED TO RAISE THE GEAR HANDLE AND LAND. THE AIRCRAFT WAS STRUCTURALLY DAMAGED DURING THE LANDING. WHEN THE AIRCRAFT WAS REMOVED FROM THE RUNWAY, AN FBO EMPLOYEE LOWERED THE GEAR HANDLE, AND THE GEAR EXTENDED AND LOCKED. HE THEN TURNED ON THE MASTER SWITCH, AND OBSERVED 3 GREEN GEAR DOWN LIGHTS ILLUMINATED. THE PILOT REPORTED THAT HE DID NOT ATTEMPT TO USE THE MANUAL ALTERNATE GEAR EXTENSION METHOD. THE PILOT ALSO REPORTED THAT THE LOSS OF ELECTRICAL POWER COULD HAVE RESULTED FROM HIS FAILURE TO TURN ON THE GENERATORS DURING THE FLIGHT.
NTSB Probable Cause
THE PILOT'S FAILURE TO FOLLOW CHECKLIST PROCEDURES IN THAT HE DID NOT UTILIZE THE ALTERNATE GEAR EXTENSION METHOD WHEN ELECTRICAL POWER WAS LOST. A FACTOR WAS HIS FAILURE TO FOLLOW THE CHECKLIST WHEN HE FAILED TO TURN ON THE GENERATORS PRIOR TO FLIGHT, WHICH RESULTED IN ELECTRICAL FAILURE.
Full Narrative
ABOUT 30 MINUTES INTO THE LOCAL FLIGHT, THE PRIVATE PILOT REPORTED THAT TOTAL ELECTRICAL POWER WAS LOST. HE COULD NOT LOWER THE FLAPS, AND WHEN HE LOWERED THE GEAR HANDLE, NO GREENS LIGHTS ILLUMINATED. HE ELECTED TO RAISE THE GEAR HANDLE AND LAND. THE AIRCRAFT WAS STRUCTURALLY DAMAGED DURING THE LANDING. WHEN THE AIRCRAFT WAS REMOVED FROM THE RUNWAY, AN FBO EMPLOYEE LOWERED THE GEAR HANDLE, AND THE GEAR EXTENDED AND LOCKED. HE THEN TURNED ON THE MASTER SWITCH, AND OBSERVED 3 GREEN GEAR DOWN LIGHTS ILLUMINATED. THE PILOT REPORTED THAT HE DID NOT ATTEMPT TO USE THE MANUAL ALTERNATE GEAR EXTENSION METHOD. THE PILOT ALSO REPORTED THAT THE LOSS OF ELECTRICAL POWER COULD HAVE RESULTED FROM HIS FAILURE TO TURN ON THE GENERATORS DURING THE FLIGHT.
Flight
Event TypeAccident
Event Time17:00 CST
Nearest AirportCrossville Memorial (1nm E)
Runway8
Runway Length5418 ft
Runway Width100 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-30
Tail NumberN7712Y
Aircraft CategoryAir
DamageSubstantial
OperatorUpchurch Cornell P
Operating RulePart 91
Engines2
Engine TypeReciprocating
Engine DetailsLycoming · IO-320-B1A · Reciprocating · 160
Seats4
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 65 · Third Class
Conditions
ConditionsVMC
LightDusk
Wind150° @ 6 kt
Visibility12 sm
CeilingBroken clouds 3500 ft
Temperature / Dew Point54 / 21 C
Altimeter30.00 inHg
Observation Time22:14
Weather SourceWFAC