NTSB Identification: ATL88FA044.
The docket is stored on NTSB microfiche number 35423.
Accident occurred Tuesday, November 24, 1987 in COMMERCIAL PT, OH
Probable Cause Approval Date: 02/14/1989
Aircraft: PIPER PA-32R-301, registration: N8046X
Injuries: 2 Fatal.

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 ACFT CRASHED ON A WHEAT FIELD DURING A NIGHT INSTRUMENT TRAINING FLT. THE PLT HAD DECLARED A VACUUM SYSTEM FAILURE ABOUT 40 MINUTES AFTER TAKE-OFF BUT HE DECLINED ATC ASSISTANCE FOR A NO-GYRO APPROACH TO COLUMBUS. TWO MINUTES AFTER THE RADIO CALL RADAR CONTACT WAS LOST. RADAR DATA DISCLOSED ERRATIC HEADING AND AIRSPEED CHANGES DURING THE LAST MINUTE OF FLT. DURING THE POST ACC INVESTIGATION EACH OF THE INSTRUMENTS WAS FOUND TO CONTAIN A SUCTION CUP. BUT NO EVIDENCE OF FAILURE OR MALFUNCTION OF THE VACUUM SYSTEM WAS FOUND. THE ACFT HAD ALSO BEEN MODIFIED WITH A STAND BY VACUUM SYSTEM FOR USE IN AN EMERGENCY AFTER FAILURE OF THE PRIMARY SYSTEM. ONLY PIECES OF THE SYSTEM WERE FOUND DUE TO THE DESTRUCTION OF THE ACFT BUT THE AVAILABLE EVIDENCE SHOWED NO SIGNS OF MALFUNCTION OR FAILURE. SUCTION CUPS, LIKE THE ONE FOUND, ARE USED BY INSTRUCTORS TO COVER INSTRUMENTS FOR PARTIAL PANEL TRAINING.

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

FLIGHT CONTROLS..IMPROPER USE OF..PILOT IN COMMAND(CFI)

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

STALL..UNCONTROLLED..PILOT IN COMMAND(CFI)


Contributing Factors

WEATHER CONDITION..CLOUDS


Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

OPERATION WITH KNOWN DEFICIENCIES IN EQUIPMENT..INTENTIONAL..PILOT IN COMMAND(CFI)


Contributing Factors

SPATIAL DISORIENTATION..PILOT IN COMMAND(CFI)

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