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A crj-200 flight crew reports right spoileron indicating an 'up' arrow on the flight synoptic page with the surface stowed on taxi. Spoileron was previously replaced; but required bushings were not installed.
| Attributes | |
| ACN | 799434 |
| Time | |
| Date | 200808 |
| Local Time Of Day | 0601 To 1200 |
| 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 200 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Function | maintenance : inspector |
| ASRS Report | 799434 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | other other : 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | performance deficiency : repair performance deficiency : testing performance deficiency : non compliance with legal requirements performance deficiency : logbook entry performance deficiency : installation |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft X called in to ZZZ with a report of the right spoileron indicating an up arrow on the flight synoptic page with the surface stowed on taxi. Mr X responded to the call. I later responded to assist in the troubleshooting of the problem. After some troubleshooting and investigating of the maintenance logbook; we realized the right spoileron inbound PCU had been replaced 1 flight leg prior to ZZZ1. We concentrated our efforts on that PCU and realized that the PCU piston rod end to surface attach point did not have the required bushings installed. We installed the 2 bushings and performed the rigging of the PCU per the maintenance manual. This rectified the discrepancy. Mr X signed the mechanic block and I performed the delegated inspector. Callback conversation with reporter revealed the following information: reporter stated the left and right spoilerons have two PCU's at each spoileron. The missing bushings on the right spoileron at the inboard PCU was enough to cause the linear variable differential transducer (lvdt) to notice a surface displacement of the spoileron and give an 'up' indication arrow on the pilot's flight synoptic page.
Original NASA ASRS Text
Title: A CRJ-200 FLIGHT CREW REPORTS RIGHT SPOILERON INDICATING AN 'UP' ARROW ON THE FLIGHT SYNOPTIC PAGE WITH THE SURFACE STOWED ON TAXI. SPOILERON WAS PREVIOUSLY REPLACED; BUT REQUIRED BUSHINGS WERE NOT INSTALLED.
Narrative: ACFT X CALLED IN TO ZZZ WITH A RPT OF THE R SPOILERON INDICATING AN UP ARROW ON THE FLT SYNOPTIC PAGE WITH THE SURFACE STOWED ON TAXI. MR X RESPONDED TO THE CALL. I LATER RESPONDED TO ASSIST IN THE TROUBLESHOOTING OF THE PROB. AFTER SOME TROUBLESHOOTING AND INVESTIGATING OF THE MAINT LOGBOOK; WE REALIZED THE R SPOILERON INBOUND PCU HAD BEEN REPLACED 1 FLT LEG PRIOR TO ZZZ1. WE CONCENTRATED OUR EFFORTS ON THAT PCU AND REALIZED THAT THE PCU PISTON ROD END TO SURFACE ATTACH POINT DID NOT HAVE THE REQUIRED BUSHINGS INSTALLED. WE INSTALLED THE 2 BUSHINGS AND PERFORMED THE RIGGING OF THE PCU PER THE MAINT MANUAL. THIS RECTIFIED THE DISCREPANCY. MR X SIGNED THE MECH BLOCK AND I PERFORMED THE DELEGATED INSPECTOR. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: REPORTER STATED THE LEFT AND RIGHT SPOILERONS HAVE TWO PCU'S AT EACH SPOILERON. THE MISSING BUSHINGS ON THE RIGHT SPOILERON AT THE INBOARD PCU WAS ENOUGH TO CAUSE THE LINEAR VARIABLE DIFFERENTIAL TRANSDUCER (LVDT) TO NOTICE A SURFACE DISPLACEMENT OF THE SPOILERON AND GIVE AN 'UP' INDICATION ARROW ON THE PILOT'S FLIGHT SYNOPTIC PAGE.
Data retrieved from NASA's ASRS site as of May 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.