NTSB Identification: ATL83FA046
Nonscheduled 14 CFR Part 135: Air Taxi & Commuter
Accident occurred Tuesday, November 23, 1982 in CULLMAN, AL
Probable Cause Approval Date: 11/23/1983
Aircraft: BEECH 95-B55, registration: N18411
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.

AFTER TAKEOFF FROM RWY 1, THE ACFT WAS OBSERVED TO CLIMB IN A STEEP ATTITUDE INTO THE CLOUDS. THE ACFT CRASHED IN A NEARVERTICAL ATTITUDE ABOUT 3/4 MI FROM THE RWY ON A BEARING OF 050 DEG. THE CONTROL LOCK PIN FLAG WAS FOUND IN THE VICINITYOF THE CONTROL COLUMN WITH THE PIN MISSING. EXAMINATION OF THE ELEVATOR TRIM MOTOR GEARS REVEALED A DAMAGE TOOTH ON THE DRIVE GEAR & A SERIES OF MARKED TEETH ON THE DRIVER GEAR. THE ELEVATOR TRIM TAB WAS FOUND IN THE MAX DEFLECTION POSITION(FULL-UP TAB.) THE ELEVATOR TRIM MOTOR, WHEN OPERATING, TAKES 57.5 SECS TO MOVE FROM NEUTRAL TO FULL UP; 27 SECS TO MOVEFROM NEUTRAL TO FULL DOWN; & 67 SECS TO MOVE FROM FULL UP TO FULL DOWN. WHEN THE CONTROL LOCK PIN IS INSTALLED, THE ELEVATOR IS LOCKED 12 DEGS DOWN & THE AILERON IS LOCKED 8 DEGS RIGHT AILERON UP. THE LEFT PROP BLADES WERE BENT AFT ABOUT THE BLADE FACES. SOME CHORDWISE SCRAPES WERE NOTED. THE PROP HAD SEPARATED FROM THE ENG DRIVE SHAFT UNDER A TORSION & BENDING LOAD.

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

REASON FOR OCCURRENCE UNDETERMINED


Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

WEATHER CONDITION..LOW CEILING


Contributing Factors

WEATHER CONDITION..FOG


Contributing Factors

WEATHER CONDITION..RAIN

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