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NTSB Report
June 7, 1990 · Aero Commander S2R · N5649X
Sisseton, SD
Overview
Report Status
Probable Cause
Event Type
Accident
Date
June 7, 1990
Injury Outcomes
No injuries (1 uninjured)
Location
Sisseton, SD
Aircraft
Aero Commander S2R
Tail Number
N5649X
Operator
Yammerino James N
Injuries
None
Aircraft Damage
Substantial
NTSB Number
DEN90LA127
THE PILOT HAD JUST FINISHED SPRAYING A WHEAT FIELD AND WAS IN A LEFT BANK, PULLING UP FROM THE SWATH RUN, WHEN THE ENGINE LOST POWER. THE PILOT WAS ABLE TO RESTORE PARTIAL POWER BY OPERATING THE WOBBLE PUMP, BUT IT WAS INSUFFICIENT TO SUSTAIN FLIGHT. DURING THE ENSUING FORCED LANDING, THE RIGHT WING AND LANDING GEAR WERE TORN OFF, THE PROPELLER WAS BENT, AND THE FUSELAGE DAMAGED. ADEQUATE FUEL WAS FOUND IN BOTH FUEL TANKS. A BRASS NIPPLE, CONNECTING THE FUEL SHUT-OFF VALVE TO THE WOBBLE PUMP, WAS FOUND CRACKED AND LEAKING FUEL. THE CRACK HAD PROPAGATED APPROXIMATELY TWO-THIRDS OF ITS CIRCUMFERENCE. ADDITIONALLY, THE FUEL VALVE SUPPORT CLAMP, DESIGNED TO RELIEVE LOADS AND STRESSES ON THE BRASS NIPPLE, WAS MISSING. EXAMINATION OF THE MAINTENANCE RECORDS SHOWED THE LAST RECORDED ANNUAL INSPECTION WAS PERFORMED ON AUGUST 31, 1983.
NTSB Probable Cause
A TOTAL LOSS OF POWER DUE TO FUEL STARVATION. FUEL STARVATION WAS CAUSED BY A MISSING FUEL VALVE SUPPORT CLAMP AND A RESULTANT CRACKED FUEL LINE. INADEQUATE MAINTENANCE INSPECTIONS AND ROUGH, UNEVEN TERRAIN WERE CONTRIBUTING FACTORS.
Full Narrative
THE PILOT HAD JUST FINISHED SPRAYING A WHEAT FIELD AND WAS IN A LEFT BANK, PULLING UP FROM THE SWATH RUN, WHEN THE ENGINE LOST POWER. THE PILOT WAS ABLE TO RESTORE PARTIAL POWER BY OPERATING THE WOBBLE PUMP, BUT IT WAS INSUFFICIENT TO SUSTAIN FLIGHT. DURING THE ENSUING FORCED LANDING, THE RIGHT WING AND LANDING GEAR WERE TORN OFF, THE PROPELLER WAS BENT, AND THE FUSELAGE DAMAGED. ADEQUATE FUEL WAS FOUND IN BOTH FUEL TANKS. A BRASS NIPPLE, CONNECTING THE FUEL SHUT-OFF VALVE TO THE WOBBLE PUMP, WAS FOUND CRACKED AND LEAKING FUEL. THE CRACK HAD PROPAGATED APPROXIMATELY TWO-THIRDS OF ITS CIRCUMFERENCE. ADDITIONALLY, THE FUEL VALVE SUPPORT CLAMP, DESIGNED TO RELIEVE LOADS AND STRESSES ON THE BRASS NIPPLE, WAS MISSING. EXAMINATION OF THE MAINTENANCE RECORDS SHOWED THE LAST RECORDED ANNUAL INSPECTION WAS PERFORMED ON AUGUST 31, 1983.
Flight
Event TypeAccident
Event Time20:45 CDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftAero Commander S2R
Tail NumberN5649X
Aircraft CategoryAir
DamageSubstantial
OperatorYammerino James N
Operating RulePart 137
Engines1
Engine TypeReciprocating
Engine DetailsP&W · R-1340-AN-1 · Reciprocating · 600
Seats1
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 40 · Second Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility10 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter0
Weather SourcePILO