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An MD80 rudder trim report was improperly cleared when an aileron trim report was worked and cleared. Rudder not adjusted for actual out of trim report.
| Attributes | |
| ACN | 586300 |
| Time | |
| Date | 200306 |
| Day | Sun |
| 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 | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : lead technician |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 586300 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure non adherence : company policies |
| Independent Detector | aircraft equipment other aircraft equipment : rudder trim indication |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure contributing factor : manuals contributing factor : briefing performance deficiency : repair performance deficiency : non compliance with legal requirements performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
I worked on aircraft X aileron and rudder trim problem. I performed a flight control check per the maintenance manual for the aileron trim problem which had to be trimmed 2 degrees left for level flight. Afterward I was told by mechanic that the aircraft had the same problem on the rudder trim. The flight control check I performed for the aileron problem included checking the rudder system. Therefore I signed off the logbook using the same wording I used for the aileron system. The problem was then fixed in tulsa after an air interrupt. On jun/thu/03, I looked in decs and found the problem I signed off for on the rudder was not the same problem as the problem on the aileron. The rudder I signed for was 4 degrees out of trim to the right. Therefore it required a different maintenance procedure than the one I performed. I failed to see in the PIREP that the rudder was 4 degrees instead of 2 degrees in which I thought initially.
Original NASA ASRS Text
Title: AN MD80 RUDDER TRIM RPT WAS IMPROPERLY CLRED WHEN AN AILERON TRIM RPT WAS WORKED AND CLRED. RUDDER NOT ADJUSTED FOR ACTUAL OUT OF TRIM RPT.
Narrative: I WORKED ON ACFT X AILERON AND RUDDER TRIM PROB. I PERFORMED A FLT CTL CHK PER THE MAINT MANUAL FOR THE AILERON TRIM PROB WHICH HAD TO BE TRIMMED 2 DEGS L FOR LEVEL FLT. AFTERWARD I WAS TOLD BY MECH THAT THE ACFT HAD THE SAME PROB ON THE RUDDER TRIM. THE FLT CTL CHK I PERFORMED FOR THE AILERON PROB INCLUDED CHKING THE RUDDER SYS. THEREFORE I SIGNED OFF THE LOGBOOK USING THE SAME WORDING I USED FOR THE AILERON SYS. THE PROB WAS THEN FIXED IN TULSA AFTER AN AIR INTERRUPT. ON JUN/THU/03, I LOOKED IN DECS AND FOUND THE PROB I SIGNED OFF FOR ON THE RUDDER WAS NOT THE SAME PROB AS THE PROB ON THE AILERON. THE RUDDER I SIGNED FOR WAS 4 DEGS OUT OF TRIM TO THE R. THEREFORE IT REQUIRED A DIFFERENT MAINT PROC THAN THE ONE I PERFORMED. I FAILED TO SEE IN THE PIREP THAT THE RUDDER WAS 4 DEGS INSTEAD OF 2 DEGS IN WHICH I THOUGHT INITIALLY.
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.