Service difficulty report · Bearing · Saab 340B

Difficulty date
November 22, 2002
Submitted
December 16, 2002
Operation
Air carrier
Aircraft
N299
Make and model
Saab 340B
Aircraft serial
299
Aircraft time
22,952 hours, 25,211 cycles
Part
Bearing
Part number
13889
Condition
Failed
Location
Nlg
Stage of operation
NR
How discovered
O
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

AFTER LANDING/TAXI TO GATE IT WAS DISCOVERED THAT THE BEARING (MANUFACTURED BY TIMKEN) IN THE LEFT FRONT NOSE WHEEL ASSEMBLY (MANUFACTURED BY AIRCRAFT BRAKING SYSTEMS ABS) HAD FAILED. IT WAS SUSPECTED THAT BEARING ASSEMBLY WAS SUBJECTED TO CONTAMINATION FROM WATER CAUSING A BRAKE DOWN OF THE LUBRICATING PROPERTIES IN THE GREASE. DURING THE BEARING FAILURE THE NOSE WHEEL AXLE SUSTAINED SUBSEQUENT DAMAGED. MAINTENANCE REMOVED AND REPLACED NOSE WHEEL ASSEMBLIES AND AXLE.

More about the Saab 340B