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A B757-200 was dispatched in non compliance with the right flight director signed off as ok for service after incomplete fault testing at the maintenance computer panel.
| Attributes | |
| ACN | 468227 |
| Time | |
| Date | 200004 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tower : hif.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance technician : 33 |
| ASRS Report | 468227 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : published procedure |
| Independent Detector | other other : 1 |
| Resolutory Action | none taken : unable |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : unqualified personnel performance deficiency : fault isolation performance deficiency : repair performance deficiency : testing |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft arrived at gate with 2 logbook entries -- right flight director inoperative and no autoplt will engage. Aircraft had history of left autoplt trouble. I ran test using the fault information manual and the maintenance computer panel remote test box. I was getting a lot of fail test messages on three tests. I believe a majority of the fail messages were caused by not being able to engage the 3 autoplts. I put the 3 autoplts on defferral according to MEL and got dispatch approval. Also pulled and secured the circuit breaker called for in the MEL. I ran test xx for the right flight director inoperative problem, and it passed the test. I am not positive that some of the messages that showed on the three tests (about 10 messages) did not refer to the flight director and would lead me to a different test. When I ran test xx and it passed, I signed off the right flight director.
Original NASA ASRS Text
Title: A B757-200 WAS DISPATCHED IN NON COMPLIANCE WITH THE R FLT DIRECTOR SIGNED OFF AS OK FOR SVC AFTER INCOMPLETE FAULT TESTING AT THE MAINT COMPUTER PANEL.
Narrative: ACFT ARRIVED AT GATE WITH 2 LOGBOOK ENTRIES -- R FLT DIRECTOR INOP AND NO AUTOPLT WILL ENGAGE. ACFT HAD HISTORY OF L AUTOPLT TROUBLE. I RAN TEST USING THE FAULT INFO MANUAL AND THE MAINT COMPUTER PANEL REMOTE TEST BOX. I WAS GETTING A LOT OF FAIL TEST MESSAGES ON THREE TESTS. I BELIEVE A MAJORITY OF THE FAIL MESSAGES WERE CAUSED BY NOT BEING ABLE TO ENGAGE THE 3 AUTOPLTS. I PUT THE 3 AUTOPLTS ON DEFFERRAL ACCORDING TO MEL AND GOT DISPATCH APPROVAL. ALSO PULLED AND SECURED THE CIRCUIT BREAKER CALLED FOR IN THE MEL. I RAN TEST XX FOR THE R FLT DIRECTOR INOP PROB, AND IT PASSED THE TEST. I AM NOT POSITIVE THAT SOME OF THE MESSAGES THAT SHOWED ON THE THREE TESTS (ABOUT 10 MESSAGES) DID NOT REFER TO THE FLT DIRECTOR AND WOULD LEAD ME TO A DIFFERENT TEST. WHEN I RAN TEST XX AND IT PASSED, I SIGNED OFF THE R FLT DIRECTOR.
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.