Service difficulty report · Bolt · Dhav DHC8102

Difficulty date
August 6, 2003
Submitted
September 4, 2003
Operation
General aviation
Make and model
Dhav DHC8102
Engine
Pwa PW120A
Propeller
Hamstd 14SF7
Part
Bolt
Part number
43667
Condition
Broken
Location
Mlg Wheel
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

(CAN) WHILE ASSEMBLING THE MAIN WHEEL, THE WHEEL BOLTS WERE TORQUED IN THE PROPER SEQUENCE AND TO PROPER TORQUE AS PER MM, THE BOLTS WERE THENCHECKED TO VERIFY THE TORQUE AND THE NUTWOULD TURN ABOUT 1/8 OF A TURN BEFOREREACHING THE TORQUE. A SECOND VERIFICATION WAS COMPLETED AND THE NUT WOULD AGAINTURN 1/8 OF A TURN AND ONE OF THEM BROKE. THE TORQUE WRENCH WAS RECHECKED FOR PROPER CALIBRATION AND FOUND SERVICEABLE. NEW BOLTS WERE ORDERED AND INSTALLED & PROBLEM RECURRED WITH TWO OF THE NEW BOLTS, ONE STRETCHED AND ONE BROKE. WHEEL MANUFACTURE WAS CONTACTED TO VERIFY THAT THE TORQUE IN THE MAINTENANCE MANUAL WAS CORRECT AND THAT THESE WERE THE CORRECT BOLTS, THEY CONFIRMED THE INFO WAS CORRECT.