Narrative:

During a phase 4A inspection at the hangar in the evening; while mechanic/crew chief was performing work card 27-700-05 (functional check of aileron actuator damping components and monitoring); the r-hand aileron positive control area (power control actuator) failed the continuity check. The positive control area was replaced by a serviceable unit and the remainder of the checks for the positive control area on work card xx and work card xy (functional check aileron damper for aileron damping force) were north/a'ed. The assumption by maintenance was that these checks would have been done by the vendor to certify the replacement positive control area as a serviceable unit; and the amm did not require these checks as part of the removal and replacement the unit. Subsequently; the phase 4A was turned in; reviewed by maintenance supervisor; reviewed by me; and released for revenue. Maintenance failed to notice the notation on work card xx that states if problems occur during this step; the positive control area is defective; so replace it with a new one and do the procedure again.

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Original NASA ASRS Text

Title: AN EMB140 WAS RELEASED FOR SVC WITH A CHK OF THE AILERON DAMPING COMPONENTS AND MONITORING NOT ACCOMPLISHED.

Narrative: DURING A PHASE 4A INSPECTION AT THE HANGAR IN THE EVENING; WHILE MECH/CREW CHIEF WAS PERFORMING WORK CARD 27-700-05 (FUNCTIONAL CHK OF AILERON ACTUATOR DAMPING COMPONENTS AND MONITORING); THE R-HAND AILERON PCA (PWR CTL ACTUATOR) FAILED THE CONTINUITY CHK. THE PCA WAS REPLACED BY A SERVICEABLE UNIT AND THE REMAINDER OF THE CHKS FOR THE PCA ON WORK CARD XX AND WORK CARD XY (FUNCTIONAL CHK AILERON DAMPER FOR AILERON DAMPING FORCE) WERE N/A'ED. THE ASSUMPTION BY MAINT WAS THAT THESE CHKS WOULD HAVE BEEN DONE BY THE VENDOR TO CERTIFY THE REPLACEMENT PCA AS A SERVICEABLE UNIT; AND THE AMM DID NOT REQUIRE THESE CHKS AS PART OF THE REMOVAL AND REPLACEMENT THE UNIT. SUBSEQUENTLY; THE PHASE 4A WAS TURNED IN; REVIEWED BY MAINT SUPVR; REVIEWED BY ME; AND RELEASED FOR REVENUE. MAINT FAILED TO NOTICE THE NOTATION ON WORK CARD XX THAT STATES IF PROBS OCCUR DURING THIS STEP; THE PCA IS DEFECTIVE; SO REPLACE IT WITH A NEW ONE AND DO THE PROC AGAIN.

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.