A B777-200 was dispatched in non compliance with #4 center tire replaced with a light tire.

Attributes
ACN	586661
Time
Date	200307
Day	Thu
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B777-200
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : airframe technician : powerplant
Experience	maintenance technician : 17
ASRS Report	586661
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : company policies non adherence : far non adherence : published procedure
Resolutory Action	none taken : detected after the fact
Consequence	other Other
Factors
Maintenance	contributing factor : schedule pressure contributing factor : lighting performance deficiency : non compliance with legal requirements performance deficiency : installation
Supplementary
Problem Areas	Maintenance Human Performance Aircraft
Primary Problem	Maintenance Human Performance

Narrative:

When I came on shift at XA00, I was given aircraft X to perform maintenance upon. #2 center and #4 center tires had been written up for FOD damage, so I went into the tire storage area for new tires. The 777B tire rack is adjacent to the 777A rack. I pulled the 2 tires out of the heavy tire rack and took them outside, and installed them on the aircraft in the dark. I later received an e-mail from a ZZZ1 supervisor about the flight delay and tire change there, because 1 of the tires had actually been a 777A light tire that had been put in the wrong rack.

Original NASA ASRS Text

Title: A B777-200 WAS DISPATCHED IN NON COMPLIANCE WITH #4 CTR TIRE REPLACED WITH A LIGHT TIRE.

Narrative: WHEN I CAME ON SHIFT AT XA00, I WAS GIVEN ACFT X TO PERFORM MAINT UPON. #2 CTR AND #4 CTR TIRES HAD BEEN WRITTEN UP FOR FOD DAMAGE, SO I WENT INTO THE TIRE STORAGE AREA FOR NEW TIRES. THE 777B TIRE RACK IS ADJACENT TO THE 777A RACK. I PULLED THE 2 TIRES OUT OF THE HEAVY TIRE RACK AND TOOK THEM OUTSIDE, AND INSTALLED THEM ON THE ACFT IN THE DARK. I LATER RECEIVED AN E-MAIL FROM A ZZZ1 SUPVR ABOUT THE FLT DELAY AND TIRE CHANGE THERE, BECAUSE 1 OF THE TIRES HAD ACTUALLY BEEN A 777A LIGHT TIRE THAT HAD BEEN PUT IN THE WRONG RACK.

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.