|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||1801 To 2400|
|Locale Reference||airport : zzz.airport|
|Altitude||agl single value : 0|
|Operator||common carrier : air carrier|
|Make Model Name||B737-900|
|Operating Under FAR Part||Part 121|
|Affiliation||company : air carrier|
|Function||maintenance : technician|
|Qualification||technician : airframe|
technician : powerplant
|Experience||maintenance technician : 17|
|Anomaly||maintenance problem : improper maintenance|
non adherence : published procedure
non adherence : far
|Independent Detector||other other : 1|
|Resolutory Action||none taken : detected after the fact|
|Maintenance||contributing factor : manuals|
contributing factor : briefing
performance deficiency : installation
performance deficiency : non compliance with legal requirements
performance deficiency : logbook entry
|Problem Areas||Maintenance Human Performance|
Chart Or Publication
|Primary Problem||Maintenance Human Performance|
Mistakenly installed a B737-900 main landing gear wheel/tire assembly on a B737-900ER aircraft. Talked with management about lack of B737-900ER aircraft confign markings/stenciling on aircraft landing gear doors and in service tires. Non B737-900ER #4 main landing gear wheel/tire assembly has been removed and replaced with a B737-900ER wheel/tire assembly. Callback conversation with reporter revealed the following information: reporter stated there are two extra plies on the B737-900ER main landing gear tires. Also; the wheel halves are different to carry the extra aircraft weight. His carrier intends to apply markings or placards on the main landing gear doors indicating the -900ER tire requirements. They have a mix of -900's and -900ER's and this has created some confusion at times. New B737-900ER's from boeing do not have any stenciling on the tires indicating the aircraft is a -900ER. They had been using the serial number on the tire for identification; not the part number on the wheel half.
Original NASA ASRS Text
Title: MECHANIC REPORTS ON REPLACING THE #4 MAIN LANDING GEAR TIRE ON A B737-900ER ACFT WITH A B737-900 STANDARD TYPE TIRE.
Narrative: MISTAKENLY INSTALLED A B737-900 MAIN LNDG GEAR WHEEL/TIRE ASSEMBLY ON A B737-900ER ACFT. TALKED WITH MGMNT ABOUT LACK OF B737-900ER ACFT CONFIGN MARKINGS/STENCILING ON ACFT LNDG GEAR DOORS AND IN SVC TIRES. NON B737-900ER #4 MAIN LNDG GEAR WHEEL/TIRE ASSEMBLY HAS BEEN REMOVED AND REPLACED WITH A B737-900ER WHEEL/TIRE ASSEMBLY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED THERE ARE TWO EXTRA PLIES ON THE B737-900ER MAIN LANDING GEAR TIRES. ALSO; THE WHEEL HALVES ARE DIFFERENT TO CARRY THE EXTRA ACFT WEIGHT. HIS CARRIER INTENDS TO APPLY MARKINGS OR PLACARDS ON THE MAIN LANDING GEAR DOORS INDICATING THE -900ER TIRE REQUIREMENTS. THEY HAVE A MIX OF -900'S AND -900ER'S AND THIS HAS CREATED SOME CONFUSION AT TIMES. NEW B737-900ER'S FROM BOEING DO NOT HAVE ANY STENCILING ON THE TIRES INDICATING THE ACFT IS A -900ER. THEY HAD BEEN USING THE SERIAL NUMBER ON THE TIRE FOR IDENTIFICATION; NOT THE PART NUMBER ON THE WHEEL HALF.
Data retrieved from NASA's ASRS site as of May 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.