NTSB Identification: NYC82FGM10
14 CFR Part 91: General Aviation
Accident occurred Tuesday, April 06, 1982 in SCANDIA, PA
Probable Cause Approval Date: 04/06/1983
Aircraft: BEECH E55, registration: N4375A
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.

AT 0834 EST, THE PILOT DEPARTED BRADFORD AIRPORT ON AN IFR FLIGHT TO ALTON, IL. ABOUT 4 MINUTES LATER, HE ADVISED THAT HE WAS HAVING DIFFICULTY WITH HIS FLIGHT INSTRUMENTS WHILE IN IFR CONDITIONS. HE ATTEMPTED TO RETURN TO THE DEPARTURE AIRPORT BY USING D.F. STEERS, BUT WAS UNABLE. HE THEN CONTACTED CLEVELAND CENTER AND WAS CLEARED TO CLIMB TO 8000 FT MSL. THE CENTER RECOMMENDED THAT THE PILOT PROCEED TO TORONTO, CANADA TO THE NEAREST AIRPORT WITH ACCEPTABLE WEATHER. HOWEVER, THE PILOT WAS UNABLE TO CONTROL HIS ALTITUDE AND HEADING, AND SUBSEQUENTLY, ENTERED A DIVE AND CRASHED. THE HSI (ATTITUDE INDICATOR), DIRECTIONAL GYRO AND TURN COORDINATOR WERE FOUND TO BE PNEUMATIC PRESSURE INSTRUMENTS, ALL OPERATING FROM THE SAME SYSTEM. THE PNEUMATIC PRESSURE SYSTEM INCORPORATED TWO PRESSUE PUMPS, ONE ON EACH ENGINE. AN INSPECTION OF THE PUMPS REVEALED THAT BOTH PUMP DRIVES WERE SHEARED. RAIDO CALLS FROM THE PILOT HAD IDENTIFIED THAT ALL PRESSURE INSTRUMENT READINGS WERE FAULTY. WEATHER: TURBC, LOW CIG, SNOW.

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

PNEUMATIC SYSTEM..FAILURE,TOTAL

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

SPATIAL DISORIENTATION..PILOT IN COMMAND





Contributing Factors

WEATHER CONDITION..SNOW


Contributing Factors

WEATHER CONDITION..LOW CEILING


Contributing Factors

WEATHER CONDITION..TURBULENCE IN CLOUDS

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