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A B737 had a modified rudder power unit installed. The modified unit required new type rudder leading edge panels. Removed panels reinstalled causing interference with rudder control rod and rudder.
| Attributes | |
| ACN | 636461 |
| Time | |
| Date | 200411 |
| Day | Fri |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 636461 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : inspector |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : engineering procedure performance deficiency : installation performance deficiency : scheduled maintenance performance deficiency : inspection performance deficiency : logbook entry performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Chart Or Publication Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
| Situations | |
| Publication | Engineering Order |
Narrative:
Installed rudder wrap around panels, under the assumption that the panels were modified. This was after observing all steps on the engineering authority/authorized were accomplished prior to my signed steps. Note: wasn't aware that new panels were part of the engineering authority/authorized kit. (Reinstalled unmodified panel creating a interference with rudder control rod and rudder.)
Original NASA ASRS Text
Title: A B737 HAD A MODIFIED RUDDER PWR UNIT INSTALLED. THE MODIFIED UNIT REQUIRED NEW TYPE RUDDER LEADING EDGE PANELS. REMOVED PANELS REINSTALLED CAUSING INTERFERENCE WITH RUDDER CTL ROD AND RUDDER.
Narrative: INSTALLED RUDDER WRAP AROUND PANELS, UNDER THE ASSUMPTION THAT THE PANELS WERE MODIFIED. THIS WAS AFTER OBSERVING ALL STEPS ON THE ENGINEERING AUTH WERE ACCOMPLISHED PRIOR TO MY SIGNED STEPS. NOTE: WASN'T AWARE THAT NEW PANELS WERE PART OF THE ENGINEERING AUTH KIT. (REINSTALLED UNMODIFIED PANEL CREATING A INTERFERENCE WITH RUDDER CTL ROD AND RUDDER.)
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.