NTSB Identification: ATL86LA089.
The docket is stored on NTSB microfiche number 30829.
Nonscheduled 14 CFR
Accident occurred Tuesday, March 11, 1986 in HANCEVILLE, AL
Aircraft: PIPER PA-28R-200, registration: N74HB
Injuries: 1 Uninjured.

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

WHILE ENROUTE TO BIRMINGHAM THE PILOT EXPERIENCED A COMPLETE POWER FAILURE WHEN NO. 2 CYLINDER SEPARATED FROM THE ENGINE ASSEMBLY. THE PILOT ATTEMPTED TO MAKE AN EMERGENCY LANDING ON INTERSTATE 65 NEAR HANCEVILLE, AL, AND THE AIRCRAFTCOLLIDED WITH AN EMBANKMENT ADJACENT TO THE SOUTHBOUND LANES. THE INVESTIGATION DETERMINED THAT THE AIRCRAFT HAD EXPERIENCED SEVERE ENGINE VIBRATIONS TWICE WITHIN THE THREE MONTHS PRIOR TO THE ACCIDENT. ON BOTH OCCURRENCES THE CYLINDERS WERE OVERHAULED AND THE AIRCRAFT RETURNED TO SERVICE. THE MAINTENANCE PERSONNEL WHO REPAIRED THE ENGINE STATED THAT HE DID NOT FOLLOW THE PROCEDURES AS OUTLINED IN THE ENGINE SERVICE MANUAL. THE FAILURE TO RETORQUE AND INSPECT THE ENGINE ASSEMBLY CAUSED THE OTHER CYLINDERS STUDS TO LOOSEN AND EVENTUAL NO. 2 CYLINDER FAILURE.

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

ENGINE ASSEMBLY,CYLINDER..SEPARATION

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

ENGINE ASSEMBLY,CONNECTING ROD..FAILURE,TOTAL

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

ENGINE ASSEMBLY,CONNECTING ROD..OVERLOAD

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

MAINTENANCE,INSPECTION..NOT PERFORMED..COMPANY MAINTENANCE PERSONNEL

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

MAINTENANCE,SERVICE BULLETIN/LETTER..NOT FOLLOWED..COMPANY MAINTENANCE PERSONNEL

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