Narrative:

During servicing of an FK10 series aircraft on nov/xa/95, I noticed that the left hand nosewheel assembly needed changed for wear. Because I was assigned to the aircraft alone, another mechanic offered to bring me the replacement wheel assembly and equipment to change the tire. Due to an error by the stockroom department, the FK10 nosewheels and the FA28-4000 nosewheels were switched in their respective holding bins in the stockroom. The nosewheels are almost identical and in fact have the same rubber outer tire, only on different rims. Due to this error in the stockroom, the mechanic who was helping me brought me the wrong wheel assembly. I then mistakenly installed the wrong assembly on the aircraft and finished my servicing of the aircraft. Because of the minor differences in the nosewheel assemblies there were no occurrences with the aircraft in its normal operations. Someone in the parts tracking department caught the difference in part numbers and notified my foreman who then caught the aircraft in another city during a through flight and had the assembly changed with only minor delay. Basically this is what happened with this incident. If there are further questions or more detailed information needed, please call. I am a line maintenance mechanic. Callback conversation with reporter revealed the following information: the reporter stated there is a potential problem if the FA28- 1000/4000 wheel is substituted for the FK10 nosewheel although they both fit. Among the differences are: the FA28-1000 nosewheel assembly weighs about 6 pounds more, the tire pressure is 100 psi instead of 75 psi, and there is a blow out plug. The pilots did not notice the difference apparently during the 3 legs the wheel was on the airplane. There must not have been a noticeable shimmy. The tag on the wheel assembly from the stock room says FA28-1000/4000 so if there is a bend or tear in the tag it could be misread to read FK100 (FK10).

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Original NASA ASRS Text

Title: RPTR MECH INADVERTENTLY PUTS FA28-4000 NOSEWHEEL ON FK10.

Narrative: DURING SVCING OF AN FK10 SERIES ACFT ON NOV/XA/95, I NOTICED THAT THE L HAND NOSEWHEEL ASSEMBLY NEEDED CHANGED FOR WEAR. BECAUSE I WAS ASSIGNED TO THE ACFT ALONE, ANOTHER MECH OFFERED TO BRING ME THE REPLACEMENT WHEEL ASSEMBLY AND EQUIP TO CHANGE THE TIRE. DUE TO AN ERROR BY THE STOCKROOM DEPT, THE FK10 NOSEWHEELS AND THE FA28-4000 NOSEWHEELS WERE SWITCHED IN THEIR RESPECTIVE HOLDING BINS IN THE STOCKROOM. THE NOSEWHEELS ARE ALMOST IDENTICAL AND IN FACT HAVE THE SAME RUBBER OUTER TIRE, ONLY ON DIFFERENT RIMS. DUE TO THIS ERROR IN THE STOCKROOM, THE MECH WHO WAS HELPING ME BROUGHT ME THE WRONG WHEEL ASSEMBLY. I THEN MISTAKENLY INSTALLED THE WRONG ASSEMBLY ON THE ACFT AND FINISHED MY SVCING OF THE ACFT. BECAUSE OF THE MINOR DIFFERENCES IN THE NOSEWHEEL ASSEMBLIES THERE WERE NO OCCURRENCES WITH THE ACFT IN ITS NORMAL OPS. SOMEONE IN THE PARTS TRACKING DEPT CAUGHT THE DIFFERENCE IN PART NUMBERS AND NOTIFIED MY FOREMAN WHO THEN CAUGHT THE ACFT IN ANOTHER CITY DURING A THROUGH FLT AND HAD THE ASSEMBLY CHANGED WITH ONLY MINOR DELAY. BASICALLY THIS IS WHAT HAPPENED WITH THIS INCIDENT. IF THERE ARE FURTHER QUESTIONS OR MORE DETAILED INFO NEEDED, PLEASE CALL. I AM A LINE MAINT MECH. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THERE IS A POTENTIAL PROB IF THE FA28- 1000/4000 WHEEL IS SUBSTITUTED FOR THE FK10 NOSEWHEEL ALTHOUGH THEY BOTH FIT. AMONG THE DIFFERENCES ARE: THE FA28-1000 NOSEWHEEL ASSEMBLY WEIGHS ABOUT 6 LBS MORE, THE TIRE PRESSURE IS 100 PSI INSTEAD OF 75 PSI, AND THERE IS A BLOW OUT PLUG. THE PLTS DID NOT NOTICE THE DIFFERENCE APPARENTLY DURING THE 3 LEGS THE WHEEL WAS ON THE AIRPLANE. THERE MUST NOT HAVE BEEN A NOTICEABLE SHIMMY. THE TAG ON THE WHEEL ASSEMBLY FROM THE STOCK ROOM SAYS FA28-1000/4000 SO IF THERE IS A BEND OR TEAR IN THE TAG IT COULD BE MISREAD TO READ FK100 (FK10).

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.