Service difficulty report · Axle · Cessna 525B

Difficulty date
April 8, 2026
Submitted
April 8, 2026
Operation
General aviation
Aircraft
N424CW
Make and model
Cessna 525B
Aircraft serial
525B0748
Aircraft time
169 hours, 134 cycles
Part
Axle
Condition
Out Of Tolerance
Location
Zone 700
Part time
169 hours, 134 cycles
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

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

What was found

DURING THE 1ST TIRE CHANGE ON THIS AIRCRAFT SINCE PRODUCTION, IT WAS FOUND THAT BOTH MLG AXLE NUTS HAD JUST FINGER TIGHT TORQUE. THE MAINTENANCE MANUAL CALLS OUT 550 IN LBS INTIAL TORQUE, BACK TO ZERO, THEN 265 -275 IN LBS FINAL TORQUE. IT WAS FOUND AFTER INSPECTION, ALL 4 MLG WHEEL BEARINGS (BOTH AXLES) WERE BURNT, BROWN IN COLOR, BOTH WHEEL RACES (LEFT AND RIGHT MLG WHEELS) WERE OVERHEATED. BOTH MLG AXLES HAD SIGNS OF WHEEL BEARINGS SPINNING ON THE AXLE, AND THE GREASE SEALS CUT GROOVES IN THE AXLES. THIS WAS A PRODUCTION FAULT. THE AIRCRAFT WAS DELIVERED IN MAY 2025 AND THE FIRST TIRE CHANGE WAS AFTER 134 CYCLES. RESULTS OF THE DAMAGE WERE SENT TO TEXTRON AND ENGINEERING CONDEMNED THE AXLES WITH NO PROVISION TO FERRY THE AIRCRAFT TO A REPAIR FACILITY. NEW AXLES WILL BE NEEDED IN ORDER TO RETURN THE AIRCRAFT TO SERVICE

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