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NTSB Report
June 17, 1988 · Cessna 172K · N7499G
Mora, MN
Overview
Report Status
Preliminary report
Event Type
Accident
Date
June 17, 1988
Injury Outcomes
No injuries (4 uninjured)
Location
Mora, MN
Aircraft
Cessna 172K
Tail Number
N7499G
Operator
Moon/Wolf Air Service
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI88DER03
DRG FLT, ONE OF THE PLTS DEMONSTRATED A NEGATIVE 'G' MANEUVER BY ENTERING A CLIMB, THEN MAKING A 'PUSH OVER' TO A DESCENT. HE THROTTLED BACK ON THE BACK SIDE OF THE MANEUVER TO MAINTAIN AIRSPEED. WHEN THE THROTTLE WAS READVANCED, THERE WAS NO ENG RESPONSE. EMERGENCY PROCEDURES WERE INITIATED, BUT THE ENG WOULD NOT RESTART. SUBSEQUENTLY, A NIGHT LANDING WAS MADE IN A WOODED AREA & THE ACFT WAS EXTENSIVELY DAMAGED. LITTLE FUEL WAS FOUND REMAINING IN THE ACFT, BUT FUEL HAD DRAINED FROM THE FUEL SYSTEM AFTER THE ACDNT. DURING A CHECK OF THE MAGNETOS, ONE PROVIDED NO SPARK & THE OTHER PROVIDED ONLY A WEAK SPARK. THE MAGNETOS WERE DISASSEMBLED; BOTH WERE FOUND TO HAVE LOOSE DISTRIBUTOR BLOCKS. ALSO, LARGE AMOUNTS OF CARBON HAD BUILT UP IN BOTH MAGNETO CASES, ALTHOUGH NO TRACE OF CARBON ARCING WAS FOUND.
Full Narrative
DRG FLT, ONE OF THE PLTS DEMONSTRATED A NEGATIVE 'G' MANEUVER BY ENTERING A CLIMB, THEN MAKING A 'PUSH OVER' TO A DESCENT. HE THROTTLED BACK ON THE BACK SIDE OF THE MANEUVER TO MAINTAIN AIRSPEED. WHEN THE THROTTLE WAS READVANCED, THERE WAS NO ENG RESPONSE. EMERGENCY PROCEDURES WERE INITIATED, BUT THE ENG WOULD NOT RESTART. SUBSEQUENTLY, A NIGHT LANDING WAS MADE IN A WOODED AREA & THE ACFT WAS EXTENSIVELY DAMAGED. LITTLE FUEL WAS FOUND REMAINING IN THE ACFT, BUT FUEL HAD DRAINED FROM THE FUEL SYSTEM AFTER THE ACDNT. DURING A CHECK OF THE MAGNETOS, ONE PROVIDED NO SPARK & THE OTHER PROVIDED ONLY A WEAK SPARK. THE MAGNETOS WERE DISASSEMBLED; BOTH WERE FOUND TO HAVE LOOSE DISTRIBUTOR BLOCKS. ALSO, LARGE AMOUNTS OF CARBON HAD BUILT UP IN BOTH MAGNETO CASES, ALTHOUGH NO TRACE OF CARBON ARCING WAS FOUND.
Flight
Event TypeAccident
Event Time22:30 CDT
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 172K
Tail NumberN7499G
Aircraft CategoryAir
DamageSubstantial
OperatorMoon/Wolf Air Service
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-E2D · Reciprocating · 150
Seats4
People & Injuries
Injury SummaryNo injuries (4 uninjured)
Fatal0
Serious0
Minor0
Uninjured4
Total4
Crew 1Age 50 · Second Class
Conditions
ConditionsVMC
LightDark Night
WindCalm
CeilingNone
Temperature / Dew Point0 C
Altimeter0
Weather SourcePILO