NTSB Identification: FTW84LA323.
The docket is stored on NTSB microfiche number 25103.
Accident occurred Wednesday, July 25, 1984 in WICHITA FALLS, TX
Aircraft: BOEING A75N1, registration: N49680
Injuries: 1 Serious,1 Minor.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE ACFT LOST THRUST AND STARTED A DESCENT AT FULL POWER DURING CLIMBOUT. A FORCED LANDING WAS MADE IN A RESIDENTIAL AREA. EXAMINATION OF THE ACFT INDICATED THAT THE PROP BLADES HAD TWISTED TO LOW PITCH. ONE BLADE WAS TWISTED 180 DEGREESAT THE SCENE. TORQUES OF LESS THAN 50 FOOT LBS AND 25 FOOT LBS WERE OBTAINED BY FAA. THE ACFT HAD BEEN USED TO TOW BANNERS AND THE TACH FACE WAS MARKED AT 2550 RPM BEYOND THE MAX-RANGE OF THIS PROP AND ENGINE COMBINATION.

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

PROPELLER SYSTEM/ACCESSORIES,HUB..UNDERTORQUED

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

MAINTENANCE,ADJUSTMENT..IMPROPER..OTHER MAINTENANCE PERSONNEL



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