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After maintenance; a CRJ700 pilot reported autoplt ailerons moved to the left but required several attempts to move to the right. Found incorrect safety on autoplt servo during an engineering order accomplishment.
| Attributes | |
| ACN | 694808 |
| Time | |
| Date | 200604 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 700 ER&LR |
| 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 | 694808 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : lead technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : r aileron interference other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : engineering procedure contributing factor : work cards performance deficiency : inspection performance deficiency : installation performance deficiency : non compliance with legal requirements performance deficiency : scheduled maintenance performance deficiency : testing |
| Supplementary | |
| Problem Areas | Aircraft Chart Or Publication Maintenance Human Performance |
| Primary Problem | Chart Or Publication |
| Situations | |
| Publication | Engineering Order |
Narrative:
A work package was issued to aircraft X. Engineering order was performed. During the accomplishment of the task; a safety was broken on the autoplt servo. The safety was incorrectly replaced when the task was completed. The result was the pilot report that the ailerons moved to the left but took several attempts to move right.callback conversation with reporter revealed the following information: the reporter stated the engineering order did not call attention to the possibility of the safety wire installation on the autoplt aileron servo causing aileron interference. The engineering order did not require a functional test of the autoplt aileron servo system which would have prevented this safety of flight incident. The reporter stated the engineering order and the maintenance manual are now being revised to prevent another maintenance discrepancy.
Original NASA ASRS Text
Title: AFTER MAINT; A CRJ700 PLT RPTED AUTOPLT AILERONS MOVED TO THE L BUT REQUIRED SEVERAL ATTEMPTS TO MOVE TO THE R. FOUND INCORRECT SAFETY ON AUTOPLT SERVO DURING AN ENGINEERING ORDER ACCOMPLISHMENT.
Narrative: A WORK PACKAGE WAS ISSUED TO ACFT X. ENGINEERING ORDER WAS PERFORMED. DURING THE ACCOMPLISHMENT OF THE TASK; A SAFETY WAS BROKEN ON THE AUTOPLT SERVO. THE SAFETY WAS INCORRECTLY REPLACED WHEN THE TASK WAS COMPLETED. THE RESULT WAS THE PLT RPT THAT THE AILERONS MOVED TO THE L BUT TOOK SEVERAL ATTEMPTS TO MOVE R.CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE ENGINEERING ORDER DID NOT CALL ATTENTION TO THE POSSIBILITY OF THE SAFETY WIRE INSTALLATION ON THE AUTOPLT AILERON SERVO CAUSING AILERON INTERFERENCE. THE ENGINEERING ORDER DID NOT REQUIRE A FUNCTIONAL TEST OF THE AUTOPLT AILERON SERVO SYSTEM WHICH WOULD HAVE PREVENTED THIS SAFETY OF FLT INCIDENT. THE RPTR STATED THE ENGINEERING ORDER AND THE MAINT MANUAL ARE NOW BEING REVISED TO PREVENT ANOTHER MAINT DISCREPANCY.
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.