NTSB Identification: FTW85FA078.
The docket is stored on NTSB microfiche number 27267.
Accident occurred Monday, December 17, 1984 in MIDLOTHIAN, TX
Aircraft: BEECH V35A, registration: N7460N
Injuries: 1 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.

N7460N, OPERATING AS MID-AMERICA FLT 401, CRASHED WHILE ON AN IFR FLT PLAN ENROUTE TO CORPUS CHRISTI, TX. AFTER HAVING BEEN VECTORED AROUND A HEAVY THUNDERSTORM & CLEARED DIRECT TO WACO, TX. THE PLT CONTACTED FORT WORTH CENTER & STATED THAT HE HAD 'LOST MY ARTIFICIAL HORIZON & MY DIRCTIONAL GYRO.' AFTER ASKING THE PLT IF THE ACFT HAD A COMPASS & RECEIVING AN AFFIRMATIVE REPLY THE ACFT WAS INSTRUCTED TO TURN TO A 010 HEADING. SHORTLY AFTER, THE RADAR TARGET WAS LOST. INVESTIGATION REVEALED THAT THE PLT HAD BEEN EMPLOYED BY MID-AMERICA FOR APROX 3 WKS AS A NIGHT REFUELER. ON THE DATE OF THE ACC THE PLT WAS REPORTEDLY GIVEN A 1.2 HR PART 135 CHECK RIDE BY THE COMPANY ASST CHIEF PLT. THE VACUUM PUMP DRIVE WAS FOUND SHEARED WITH THE SHEARED ENDS POLISHED, INDICATING THAT THE DRAYING END WAS STILL ROTATING AFTER SHAFT SEPARATION. ONE VACUUM DRIVEN GYRO WAS FOUND SHOWING NO EVIDENCE OF ROTATION AT IMPACT. THE GYRO FROM THE ELECTRICALLY POWERED TURN & BANK SHOWED NO SIGNS OF ROTATION AT IMPACT.

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

VISUAL LOOKOUT..NOT POSSIBLE..PILOT IN COMMAND

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

SPATIAL DISORIENTATION..PILOT IN COMMAND


Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

FLIGHT/NAV INSTRUMENTS,TURN AND BANK INDICATOR..INOPERATIVE


Contributing Factors

FLIGHT/NAV INSTRUMENTS,ATTITUDE INDICATOR..INOPERATIVE


Contributing Factors

WEATHER CONDITION..LOW CEILING


Contributing Factors

WEATHER CONDITION..FOG


Contributing Factors

FLIGHT/NAV INSTRUMENTS,DIRECTIONAL GYRO..INOPERATIVE


Contributing Factors

VACUUM SYSTEM..INOPERATIVE


Contributing Factors

ENGINE ACCESSORIES,VACUUM PUMP..FAILURE,TOTAL


Contributing Factors

LACK OF TOTAL INSTRUMENT TIME..PILOT IN COMMAND

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