NTSB Identification: ATL88FA052.
The docket is stored on NTSB microfiche number 35743.
Nonscheduled 14 CFR
Accident occurred Thursday, December 03, 1987 in MANSFIELD, OH
Probable Cause Approval Date: 12/27/1988
Aircraft: PIPER PA-60-600, registration: N500TS
Injuries: 1 Serious.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE PILOT DEPARTED LOUISVILLE, KY REPORTEDLY WITH A KNOWN OIL LEAK IN THE RIGHT ENGINE AND WAS ON THE SECOND LEG OF AN ON-DEMAND AIR TAXI CARGO FLIGHT. ABOUT 14 MINUTES AFTER ENTERING MANSFIELD APPROACH CONTROL AIRSPACE, THE PILOT REQUESTED AND RECEIVED AN ALTITUDE CHANGE FROM 5,000 TO 3,000 FT BECAUSE HE 'WAS PICKING UP A LOT OF ICE.' AFTER ENTERING CLEVELAND APPROACH AIRSPACE HE REPORTED THE RIGHT ENGINE HAD FAILED AND REQUESTED TO RETURN TO MANSFIELD. THE PILOT WAS INFORMED OF MANSFIELD WEATHER. HE THEN INDICATED HE WANTED TO TRY CLEVELAND, THEN REPORTED HE COULD NOT MAINTAIN ALTITUDE AND WANTED TO GO TO MANSFIELD. THE PILOT WAS RECEIVING VECTORS FROM MANSFIELD FOR AN ASR APPROACH TO RUNWAY 23 AND AT ABOUT 1 1/2 MILES FROM THE THRESHOLD THE PILOT REPORTED HE WAS LOWERING THE LANDING GEAR. THE AIRCRAFT THEN DISAPPEARED FROM THE RADAR SCOPE. INVESTIGATION REVEALED IMPROPER WELD REPAIRS TO THE RIGHT ENGINE CASE AND SEPARATION OF THE NUMBER SIX CYLINDER FROM THE CASE DUE TO FATIGUE CRACKING IN THE THROUGH BOLTS AND STUDS.

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

MAINTENANCE,MAJOR REPAIR..IMPROPER..OTHER MAINTENANCE PERSONNEL

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

ENGINE ASSEMBLY,OTHER..FATIGUE

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:

IN-FLIGHT PLANNING/DECISION..DELAYED..PILOT IN COMMAND



Contributing Factors

OBJECT..TREE(S)


Contributing Factors

WEATHER CONDITION..ICING CONDITIONS



Contributing Factors

WEATHER CONDITION..BELOW APPROACH/LANDING MINIMUMS


Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

OPERATION WITH KNOWN DEFICIENCIES IN EQUIPMENT..CONTINUED..PILOT IN COMMAND


Contributing Factors

COMPANY-INDUCED PRESSURE..PILOT IN COMMAND

Index for Dec1987 | Index of months