Narrative:

Aircraft rolled to right on liftoff. First officer applied a lot of left aileron to keep wings level. Once aircraft was cleaned up and accelerated to 250 KTS, aircraft flew ok. On landing at phx the aircraft exhibited the same handling problems. The slower you got, the more left aileron was required. Aircraft was removed from service and the #7 carriage thrust bearing was replaced. Aircraft OTS 3 days. The problem I have with this is, our pilots are so used to crappy maintenance at my air carrier, they are accepting and flying aircraft that should be grounded. Callback conversation with reporter revealed the following information: the captain stated that the corrective action after the postflt inspection was to replace the #7 spindle carriage thrust bearing on the left trailing edge flap casting. The bearing was noted as 'having movement in-flight.' the flap was moving 1 inch further to the extended position than the right flap set. The captain had a similar experience about 7 months ago but blames this incident on 'poor' maintenance. The last 2 weeks were better but the aircraft were being repaired only because the airline has canceled a lot of flts in order to perform this needed maintenance.

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Original NASA ASRS Text

Title: A B737 FLC EXPERIENCES A ROLLING TENDENCY OF THEIR ACFT DURING TKOF AND INITIAL CLB UNTIL THE FLAPS ARE RETRACTED. THE SAME EVENT, IN REVERSE, OCCURS ON APCH AND LNDG AT DEST.

Narrative: ACFT ROLLED TO R ON LIFTOFF. FO APPLIED A LOT OF L AILERON TO KEEP WINGS LEVEL. ONCE ACFT WAS CLEANED UP AND ACCELERATED TO 250 KTS, ACFT FLEW OK. ON LNDG AT PHX THE ACFT EXHIBITED THE SAME HANDLING PROBS. THE SLOWER YOU GOT, THE MORE L AILERON WAS REQUIRED. ACFT WAS REMOVED FROM SVC AND THE #7 CARRIAGE THRUST BEARING WAS REPLACED. ACFT OTS 3 DAYS. THE PROB I HAVE WITH THIS IS, OUR PLTS ARE SO USED TO CRAPPY MAINT AT MY ACR, THEY ARE ACCEPTING AND FLYING ACFT THAT SHOULD BE GNDED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE CAPT STATED THAT THE CORRECTIVE ACTION AFTER THE POSTFLT INSPECTION WAS TO REPLACE THE #7 SPINDLE CARRIAGE THRUST BEARING ON THE L TRAILING EDGE FLAP CASTING. THE BEARING WAS NOTED AS 'HAVING MOVEMENT INFLT.' THE FLAP WAS MOVING 1 INCH FURTHER TO THE EXTENDED POS THAN THE R FLAP SET. THE CAPT HAD A SIMILAR EXPERIENCE ABOUT 7 MONTHS AGO BUT BLAMES THIS INCIDENT ON 'POOR' MAINT. THE LAST 2 WKS WERE BETTER BUT THE ACFT WERE BEING REPAIRED ONLY BECAUSE THE AIRLINE HAS CANCELED A LOT OF FLTS IN ORDER TO PERFORM THIS NEEDED MAINT.

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.