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A B737-700 was dispatched in non compliance with the incorrect nose landing gear tires and wheels installed, caused by a tire stocking problem.
| Attributes | |
| ACN | 560055 |
| Time | |
| Date | 200209 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 560055 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | performance deficiency : non compliance with legal requirements performance deficiency : logbook entry performance deficiency : installation performance deficiency : scheduled maintenance |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Company Chart Or Publication Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
On the evening of sep/thu/02, I was assigned a service check on aircraft. The nose tires on the aircraft required changing so I returned to the shop to pick up the tires. I pulled 2 wheel/tire assemblies from our -700 tire stock. This is where the problem originated. A -300/500 assembly had inadvertently been placed in the -700 stock after being inspected. Ultimately I was responsible for not verifying that the proper tires were installed. I am not certain when the problem was discovered. The proper tires were installed on sep/mon/02, (only #1 was incorrect) during a dayshift through flight at ZZZ. Mr X issued a letter to all inspectors/alternates to be aware of tire placement into stock after inspection. I have advised other mechanics to verify part numbers of nosewheel assemblies before installation.
Original NASA ASRS Text
Title: A B737-700 WAS DISPATCHED IN NON COMPLIANCE WITH THE INCORRECT NOSE LNDG GEAR TIRES AND WHEELS INSTALLED, CAUSED BY A TIRE STOCKING PROB.
Narrative: ON THE EVENING OF SEP/THU/02, I WAS ASSIGNED A SVC CHK ON ACFT. THE NOSE TIRES ON THE ACFT REQUIRED CHANGING SO I RETURNED TO THE SHOP TO PICK UP THE TIRES. I PULLED 2 WHEEL/TIRE ASSEMBLIES FROM OUR -700 TIRE STOCK. THIS IS WHERE THE PROB ORIGINATED. A -300/500 ASSEMBLY HAD INADVERTENTLY BEEN PLACED IN THE -700 STOCK AFTER BEING INSPECTED. ULTIMATELY I WAS RESPONSIBLE FOR NOT VERIFYING THAT THE PROPER TIRES WERE INSTALLED. I AM NOT CERTAIN WHEN THE PROB WAS DISCOVERED. THE PROPER TIRES WERE INSTALLED ON SEP/MON/02, (ONLY #1 WAS INCORRECT) DURING A DAYSHIFT THROUGH FLT AT ZZZ. MR X ISSUED A LETTER TO ALL INSPECTORS/ALTERNATES TO BE AWARE OF TIRE PLACEMENT INTO STOCK AFTER INSPECTION. I HAVE ADVISED OTHER MECHS TO VERIFY PART NUMBERS OF NOSEWHEEL ASSEMBLIES BEFORE INSTALLATION.
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.