19951011032059A

Accident · Substantial damage

FAA accident report · Cessna 172F · Blaine Township, WI · October 11, 1995

Date: October 11, 1995 · 12:30 local
Place: Blaine Township, WI
Phase of flight: Fcd/Prec Ldg From Cruise
Operating rules: General operating rules (Part 91)
Damage: Substantial damage
Aircraft: N8740U
NTSB investigation: NTSBCHI96LA006
Reported as: Cessna 172F
Reported engine: Continental O300D
People aboard: 1
Fatal injuries: 0
Pilot’s flight hours: 2,177 total26 in this make and model45 in the last 90 days

N8740URegistration cancelled Apr 17, 1996 · Cessna 172FS/N 17252644 Airframe modelCessna 172F

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

Lost power. Forced landing. Magneto cover came loose. Crossfired. Using unaproved dirty fuel. No fuel STC. (-23) the accident investigation revealed an unapproved fuel was being used in the operation. A fuel sample drawn from the strainer revealed water mixed with some dirt and a straw color. The engine inspection performed found the left magneto cover off the magneto base. Of the four screws that hold the cover on, only one screw was found and it had sheared off. With this cover coming loose the magneto is believed to have started to crossfire causing the engine to lose power.

As the FAA filed it

LOST POWER. FORCED LANDING. MAGNETO COVER CAME LOOSE. CROSSFIRED. USING UNAPROVED DIRTY FUEL. NO FUEL STC. (-23) THE ACCIDENT INVESTIGATION REVEALED AN UNAPPROVED FUEL WAS BEING USED IN THE OPERATION. A FUEL SAMPLE DRAWN FROM THE STRAINER REVEALED WATER MIXED WITH SOME DIRT AND A STRAW COLOR. THE ENGINE INSPECTION PERFORMED FOUND THE LEFT MAGNETO COVER OFF THE MAGNETO BASE. OF THE FOUR SCREWS THAT HOLD THE COVER ON, ONLY ONE SCREW WAS FOUND AND IT HAD SHEARED OFF. WITH THIS COVER COMING LOOSE THE MAGNETO IS BELIEVED TO HAVE STARTED TO CROSSFIRE CAUSING THE ENGINE TO LOSE POWER.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

NTSB CHI96LA006Accident · No injuriesLimited investigationFinal reportDanbury, WIthe partial failure of the left magneto, the road sign, and the road embankment. A factor relating to this accident is the brush which obscured the road sign.Oct 11, 1995 · Substantial damage

Other reports on N8740U · 1

Matched to the same aircraft by N-number and date.

Accident 19810525028659ATakeoff Ground Roll · Boelus, NEThe pilot tried to take off from a short, unsuitable field. Did not have enough runway available.May 25, 1981 · Destroyed