A B757-200 was dispatched after the left nose gear tire and wheel assembly were replaced. Aircraft later had outer wheel bearing failure due to axle washer not installed.

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Attributes
ACN	697322
Time
Date	200605
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
Experience	maintenance technician : 4
ASRS Report	697322
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : far non adherence : published procedure
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : manuals performance deficiency : inspection performance deficiency : logbook entry performance deficiency : installation performance deficiency : non compliance with legal requirements
Supplementary
Problem Areas	Chart Or Publication Aircraft Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

On may/sat/06 I was instructed to change a l-hand nose gear tire on a B757 aircraft. I changed the tire per maintenance manual specifications. The same day this plane returned to the airport on an inbound flight with a wheel bearing failure. The preliminary investigation revealed the l-hand nose tire axle washer was not installed. To the best of my knowledge; I installed this washer; but it is possible that it got left out. The aircraft went down for maintenance and returned to service the next day.

Original NASA ASRS Text

Title: A B757-200 WAS DISPATCHED AFTER THE L NOSE GEAR TIRE AND WHEEL ASSEMBLY WERE REPLACED. ACFT LATER HAD OUTER WHEEL BEARING FAILURE DUE TO AXLE WASHER NOT INSTALLED.

Narrative: ON MAY/SAT/06 I WAS INSTRUCTED TO CHANGE A L-HAND NOSE GEAR TIRE ON A B757 ACFT. I CHANGED THE TIRE PER MAINT MANUAL SPECS. THE SAME DAY THIS PLANE RETURNED TO THE ARPT ON AN INBOUND FLT WITH A WHEEL BEARING FAILURE. THE PRELIMINARY INVESTIGATION REVEALED THE L-HAND NOSE TIRE AXLE WASHER WAS NOT INSTALLED. TO THE BEST OF MY KNOWLEDGE; I INSTALLED THIS WASHER; BUT IT IS POSSIBLE THAT IT GOT LEFT OUT. THE ACFT WENT DOWN FOR MAINT AND RETURNED TO SVC THE NEXT DAY.

Data retrieved from NASA's ASRS site as of January 2009 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.