NTSB Identification: MKC83LA103.
The docket is stored on NTSB microfiche number 23784.
Accident occurred Friday, May 06, 1983 in CLINTON, MO
Aircraft: PIPER PA-31-350, registration: N278MW
Injuries: 3 Minor.

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 CRUISING AT 8,500 FT THE PAX IN THE RIGHT SEAT NOTICED THAT THE OIL FILLER ACCESS DOOR ON TOP OF THE RIGHT ENG WASOPEN & OIL WAS LEAKING. THE PLT CHECKED THE ENG INSTRUMENTS & THE ONLY ABNORMAL READING WAS A LOW MANIFOLD PRESSURE READING ON THE LEFT ENG. THE PLT ELECTED TO MAKE A PRECAUTIONARY LANDING AT CLINTON. THE PLT STATED THAT WHILE IN THE TRAFFIC PATTERN HE HEARD THE LEFT ENG CUTTING OUT. REMEMBERING THE EARLIER INDICATION O LOW MP ON THE LEFT ENG, HE THOUGHT THE LEFT ENG WAS FAILING & FEATHERED THE LEFT PROP. HE RETRACTED GEAR & FLAPS, BUT THE RIGHT ENG WOULD NOT PRODUCE ENOUGH POWER & THE ACFT CRASH LANDED IN A WHEAT FIELD. EXAM OF THE RIGHT ENG REVEALED A FATIGUE FAILURE OF THE #4 CYL. INITIATION HAD OCCURRED AT PRE-EXISTING SHARP-BOTTOMED DENTS IN THE TWO CRACKED FINS WITH PROPAGATION TOWARD & INTO THE CYL. THE LEFT ENG WAS RUN & THE ONLY DEFICIENCY NOTED WAS THAT THE ENG RAN RICHER THAN NORMAL AT LOW POWER SETTINGS.

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

AIRCRAFT PERFORMANCE,TWO OR MORE ENGINES..INOPERATIVE

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

WRONG PROPELLER FEATHERED..INADVERTENT..PILOT IN COMMAND

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

ENGINE ASSEMBLY,CYLINDER..FATIGUE

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

ENGINE ASSEMBLY,CYLINDER..FAILURE,TOTAL



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