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A B757-200 returned to the field due to EICAS elevator feel warning. Feel computer was replaced prior to flight per maintenance manual procedure. Found static pressure leak at feel computer. Procedure required pressure check of pitot but not static pressure.
| Attributes | |
| ACN | 598478 |
| Time | |
| Date | 200310 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : initial climbout : takeoff climbout other ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Qualification | technician : fcc technician : airframe technician : powerplant |
| Experience | maintenance avionics : 8 maintenance technician : 13 |
| ASRS Report | 598478 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical non adherence : far other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : eicas warning other flight crewa |
| Resolutory Action | flight crew : diverted to another airport flight crew : overcame equipment problem |
| Consequence | other Other |
| Factors | |
| Maintenance | contributing factor : manuals |
| Supplementary | |
| Problem Areas | Chart Or Publication Aircraft Maintenance Human Performance |
| Primary Problem | Chart Or Publication |
| Situations | |
| Publication | Maint Manual |
Narrative:
At approximately XA00 on oct/fri, I picked up from 2 mechanics on second shift. They had just changed an elevator feel computer on a B757. They had changed the computer and short signed for the installation and part of the chkout. Then they made a separate log entry for remaining portions of the chkout, which were steps F, G, and H. I completed steps F, G, and H per the maintenance manual. Everything checked ok and the aircraft was returned to service. The next day the aircraft had an air turn-back due to an elevator feel EICAS message. The mechanics found a leaking static line to the computer. The portions of the chkout I performed required visual inspection of the connections for the static lines to the computer, but not a vacuum or pressure test. It required a pressure test of the pitot side, but not the static.
Original NASA ASRS Text
Title: A B757-200 RETURNED TO THE FIELD DUE TO EICAS ELEVATOR FEEL WARNING. FEEL COMPUTER WAS REPLACED PRIOR TO FLT PER MAINT MANUAL PROC. FOUND STATIC PRESSURE LEAK AT FEEL COMPUTER. PROC REQUIRED PRESSURE CHK OF PITOT BUT NOT STATIC PRESSURE.
Narrative: AT APPROX XA00 ON OCT/FRI, I PICKED UP FROM 2 MECHS ON SECOND SHIFT. THEY HAD JUST CHANGED AN ELEVATOR FEEL COMPUTER ON A B757. THEY HAD CHANGED THE COMPUTER AND SHORT SIGNED FOR THE INSTALLATION AND PART OF THE CHKOUT. THEN THEY MADE A SEPARATE LOG ENTRY FOR REMAINING PORTIONS OF THE CHKOUT, WHICH WERE STEPS F, G, AND H. I COMPLETED STEPS F, G, AND H PER THE MAINT MANUAL. EVERYTHING CHKED OK AND THE ACFT WAS RETURNED TO SVC. THE NEXT DAY THE ACFT HAD AN AIR TURN-BACK DUE TO AN ELEVATOR FEEL EICAS MESSAGE. THE MECHS FOUND A LEAKING STATIC LINE TO THE COMPUTER. THE PORTIONS OF THE CHKOUT I PERFORMED REQUIRED VISUAL INSPECTION OF THE CONNECTIONS FOR THE STATIC LINES TO THE COMPUTER, BUT NOT A VACUUM OR PRESSURE TEST. IT REQUIRED A PRESSURE TEST OF THE PITOT SIDE, BUT NOT THE STATIC.
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.