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A B757-200 technician reports making only the bite tests called out by maintenance control on a hot engine and omitting remainder of manual procedure.
| Attributes | |
| ACN | 555292 |
| Time | |
| Date | 200207 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757 Undifferentiated or Other Model |
| 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 | 555292 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : exhaust gas indication |
| Resolutory Action | other |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : fault isolation performance deficiency : repair |
| Supplementary | |
| Problem Areas | Chart Or Publication Company Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
On 07/sun/02, I was assigned aircraft X. After consulting logbook, called technical services about this egt excursion problem. Pilots also called technical earlier about this problem. Since the pilots called earlier, I decided to call technical because I thought they would have guidance and knowledge of this problem. I asked technical service personnel 'what should I do?' he said because of the history he will put a technical foreman note on this item to get the left engine within 5 flts. He said I could do the bite for the bleed valve control unit and transient pressure unit and I asked if I had to do this per the paperwork (fim 75-05-00 figure 116) and he said no. He also said that doing the bite would only help the engineers, so I don't have to do the bite. He said per the history it did not have 5 excursions into zone a. Nevertheless, the item was signed and the aircraft departed. Then, after it left ZZZ, I looked up the chart that he was referring to while I was talking to him. I noticed I had to do more than he told me. I should have 'find the cause and correct it' per tsm 71-05-00 figure 116 and figure 121. I contacted mr X after the flight left and he told me he would contact ZZZ maintenance and make sure the problem was looked into. He also was contacting an engineer about this problem.
Original NASA ASRS Text
Title: A B757-200 TECHNICIAN RPTS MAKING ONLY THE BITE TESTS CALLED OUT BY MAINT CTL ON A HOT ENG AND OMITTING REMAINDER OF MANUAL PROC.
Narrative: ON 07/SUN/02, I WAS ASSIGNED ACFT X. AFTER CONSULTING LOGBOOK, CALLED TECHNICAL SVCS ABOUT THIS EGT EXCURSION PROB. PLTS ALSO CALLED TECHNICAL EARLIER ABOUT THIS PROB. SINCE THE PLTS CALLED EARLIER, I DECIDED TO CALL TECHNICAL BECAUSE I THOUGHT THEY WOULD HAVE GUIDANCE AND KNOWLEDGE OF THIS PROB. I ASKED TECHNICAL SVC PERSONNEL 'WHAT SHOULD I DO?' HE SAID BECAUSE OF THE HISTORY HE WILL PUT A TECHNICAL FOREMAN NOTE ON THIS ITEM TO GET THE L ENG WITHIN 5 FLTS. HE SAID I COULD DO THE BITE FOR THE BLEED VALVE CTL UNIT AND TRANSIENT PRESSURE UNIT AND I ASKED IF I HAD TO DO THIS PER THE PAPERWORK (FIM 75-05-00 FIGURE 116) AND HE SAID NO. HE ALSO SAID THAT DOING THE BITE WOULD ONLY HELP THE ENGINEERS, SO I DON'T HAVE TO DO THE BITE. HE SAID PER THE HISTORY IT DID NOT HAVE 5 EXCURSIONS INTO ZONE A. NEVERTHELESS, THE ITEM WAS SIGNED AND THE ACFT DEPARTED. THEN, AFTER IT LEFT ZZZ, I LOOKED UP THE CHART THAT HE WAS REFERRING TO WHILE I WAS TALKING TO HIM. I NOTICED I HAD TO DO MORE THAN HE TOLD ME. I SHOULD HAVE 'FIND THE CAUSE AND CORRECT IT' PER TSM 71-05-00 FIGURE 116 AND FIGURE 121. I CONTACTED MR X AFTER THE FLT LEFT AND HE TOLD ME HE WOULD CONTACT ZZZ MAINT AND MAKE SURE THE PROB WAS LOOKED INTO. HE ALSO WAS CONTACTING AN ENGINEER ABOUT THIS PROB.
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.