<< >> NASA ASRS Report 658002, May 2005

A B737-300 had #3 tire and wheel assembly replaced on overnight layover check. On termination of first flight; discovered #3 main hubcap missing.

Attributes
ACN	658002
Time
Date	200505
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	B737-300
Operating Under FAR Part	Part 121
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
ASRS Report	658002
Person 2
Affiliation	company : air carrier
Function	maintenance : technician
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure non adherence : company policies
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other other other
Factors
Maintenance	contributing factor : lighting contributing factor : work cards performance deficiency : installation performance deficiency : logbook entry performance deficiency : inspection performance deficiency : scheduled maintenance performance deficiency : non compliance with legal requirements
Supplementary
Problem Areas	Aircraft Maintenance Human Performance Chart Or Publication Environmental Factor
Primary Problem	Maintenance Human Performance

Narrative:

Aircraft terminated in ZZZ1 for service check also had pressurization problem. I was assigned to the aircraft by routine overnight check lead. I started working and troubleshooting the pressurization problem and several other mechanics stopped by to help as is normal on routine overnight check shift. The #1 and #3 tires were worn and needed changing. I was working in the main wheel well at the keel beam area. I witnessed the tire being changed by mechanic X. I completed the logbook and signed for the right&right of the tire. I was informed may/fri/05 that the #3 hub cap was discovered missing in ZZZ2 on walkaround inspection by the crew. To my knowledge; the task was completed in accordance with the maintenance manual. I would like to add that mechanic X is familiar with the procedure; as it is a routine task!

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Original NASA ASRS Text

Title: A B737-300 HAD #3 TIRE AND WHEEL ASSEMBLY REPLACED ON OVERNIGHT LAYOVER CHK. ON TERMINATION OF FIRST FLT; DISCOVERED #3 MAIN HUBCAP MISSING.

Narrative: ACFT TERMINATED IN ZZZ1 FOR SVC CHK ALSO HAD PRESSURIZATION PROB. I WAS ASSIGNED TO THE ACFT BY ROUTINE OVERNIGHT CHK LEAD. I STARTED WORKING AND TROUBLESHOOTING THE PRESSURIZATION PROB AND SEVERAL OTHER MECHS STOPPED BY TO HELP AS IS NORMAL ON ROUTINE OVERNIGHT CHK SHIFT. THE #1 AND #3 TIRES WERE WORN AND NEEDED CHANGING. I WAS WORKING IN THE MAIN WHEEL WELL AT THE KEEL BEAM AREA. I WITNESSED THE TIRE BEING CHANGED BY MECH X. I COMPLETED THE LOGBOOK AND SIGNED FOR THE R&R OF THE TIRE. I WAS INFORMED MAY/FRI/05 THAT THE #3 HUB CAP WAS DISCOVERED MISSING IN ZZZ2 ON WALKAROUND INSPECTION BY THE CREW. TO MY KNOWLEDGE; THE TASK WAS COMPLETED IN ACCORDANCE WITH THE MAINT MANUAL. I WOULD LIKE TO ADD THAT MECH X IS FAMILIAR WITH THE PROC; AS IT IS A ROUTINE TASK!

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.