NTSB Identification: ATL88LA216.
The docket is stored on NTSB microfiche number 37507.
Accident occurred Thursday, July 14, 1988 in MICHIE, TN
Probable Cause Approval Date: 09/11/1989
Aircraft: CESSNA 172L, registration: N19632
Injuries: 1 Serious.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

WITNESS REPORTED THAT THE AIRPLANE ENGINE WAS RUNNING ROUGH DURING TAKEOFF; THE AIRPLANE SUBSEQUENTLY DISAPPEARED FROM SIGHT IN A NOSE-DOWN ATTITUDE. THE PLT LATER REPORTED THAT HE COULD NOT REMEMBER THE EVENTS THAT LED UP TO THE POWER LOSS. POST-CRASH EXAM OF THE AIRPLANE REVEALED NUMEROUS MECHANICAL DISCREPANCIES INCLUDING SEVERAL SPARK PLUGS W/CRACKED INSULATORS, AN INOP MAGNETO, FUEL SYSTEM CONTAMINATION, AND FUEL TANK VENT SYSTEM BLOCKAGE. 'VISE-GRIP' TOOL MARKINGS WERE FOUND ON SEVERAL OF THE SPARK PLUGS. THE ENGINE RAN AND DEVELOPED SATISFACTORY PWR ON A TEST-STAND AFTER THE INOP MAG AND SPARK PLUGS WERE REPLACED. THE ENGINE WOULD ONLY DEVELOP PARTIAL PWR AND WOULD NOT EXCEED 1200 RPM WHEN THE ORIGINAL SPARK PLUGS WERE REINSTALLED. THE PLT, WHO WAS ALSO THE ACFT OWNER, WAS NOT ABLE TO PROVIDE ANY MAINTENANCE RECORDS FOR THE ACFT. THE PLT'S LAST MEDICAL EXAM WAS 5 1/2 YRS EARLIER, ACCORDING TO FAA RECORDS.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

IGNITION SYSTEM,MAGNETO..INOPERATIVE

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

IGNITION SYSTEM,SPARK PLUG..ERRATIC


Contributing Factors

AIRSPEED..NOT MAINTAINED..PILOT IN COMMAND


Contributing Factors

FUEL SYSTEM..CONTAMINATION


Contributing Factors

FUEL SYSTEM,VENT..BLOCKED(TOTAL)


Contributing Factors

MAINTENANCE..IMPROPER

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