B767-300 mechanic left out a nosewheel bearing spacer when changing a tire.

Attributes
ACN	628930
Time
Date	200408
Day	Sat
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : fcc technician : airframe
Experience	maintenance technician : 17
ASRS Report	628930
Person 2
Affiliation	Other
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure non adherence : far non adherence : company policies
Independent Detector	other other : 2
Resolutory Action	none taken : detected after the fact
Consequence	other
Factors
Maintenance	contributing factor : lighting contributing factor : schedule pressure performance deficiency : inspection performance deficiency : repair performance deficiency : training performance deficiency : non compliance with legal requirements performance deficiency : logbook entry performance deficiency : installation
Supplementary
Problem Areas	FAA Aircraft Company Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

On aug/sat/04, while performing layover check found left nose tire worn to limits. Approximately XA30, replaced wheel assembly. Aircraft departed the morning of aug/sun/04 and flew 6 days with no reported nosewheel problems. On aug/fri/04 the wheel overhaul shop discovered the inner wheel spacer and informed the maintenance coordination center which had an immediate inspection for spacer on left nosewheel. The aircraft took a 7 min delay while the spacer was installed. At time of the nosewheel installation I failed to notice that the inner spacer had stuck to the wheel bearing when removing the wheel. Lighting conditions at the time were a factor.

Original NASA ASRS Text

Title: B767-300 MECH LEFT OUT A NOSEWHEEL BEARING SPACER WHEN CHANGING A TIRE.

Narrative: ON AUG/SAT/04, WHILE PERFORMING LAYOVER CHK FOUND L NOSE TIRE WORN TO LIMITS. APPROX XA30, REPLACED WHEEL ASSEMBLY. ACFT DEPARTED THE MORNING OF AUG/SUN/04 AND FLEW 6 DAYS WITH NO RPTED NOSEWHEEL PROBS. ON AUG/FRI/04 THE WHEEL OVERHAUL SHOP DISCOVERED THE INNER WHEEL SPACER AND INFORMED THE MAINT COORD CTR WHICH HAD AN IMMEDIATE INSPECTION FOR SPACER ON L NOSEWHEEL. THE ACFT TOOK A 7 MIN DELAY WHILE THE SPACER WAS INSTALLED. AT TIME OF THE NOSEWHEEL INSTALLATION I FAILED TO NOTICE THAT THE INNER SPACER HAD STUCK TO THE WHEEL BEARING WHEN REMOVING THE WHEEL. LIGHTING CONDITIONS AT THE TIME WERE A FACTOR.

Data retrieved from NASA's ASRS site as of July 2007 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.