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A B737-400 was dispatched with 1 engine cowl anti-ice valve deferred in open position per the MEL. Special procedures were accomplished improperly.
| Attributes | |
| ACN | 722555 |
| Time | |
| Date | 200612 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 722555 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : published procedure non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : cowl anti-ice position lights other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : weather contributing factor : manuals performance deficiency : testing performance deficiency : inspection performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Aircraft Chart Or Publication Maintenance Human Performance Weather |
| Primary Problem | Maintenance Human Performance |
Narrative:
Called out to MEL cowl anti-ice valve. I had in hand MEL procedures 30-3D for B-400 aircraft. Heavy rain made paperwork a mess. The whittaker valve was locked in the mid position but I did not see the pressure regulator on the valve. Graphics were not clear about location of set screw. I also removed the wrong electrical connector due to paperwork messed up from rain.
Original NASA ASRS Text
Title: A B737-400 WAS DISPATCHED WITH 1 ENG COWL ANTI-ICE VALVE DEFERRED IN OPEN POS PER THE MEL. SPECIAL PROCS WERE ACCOMPLISHED IMPROPERLY.
Narrative: CALLED OUT TO MEL COWL ANTI-ICE VALVE. I HAD IN HAND MEL PROCS 30-3D FOR B-400 ACFT. HVY RAIN MADE PAPERWORK A MESS. THE WHITTAKER VALVE WAS LOCKED IN THE MID POS BUT I DID NOT SEE THE PRESSURE REGULATOR ON THE VALVE. GRAPHICS WERE NOT CLR ABOUT LOCATION OF SET SCREW. I ALSO REMOVED THE WRONG ELECTRICAL CONNECTOR DUE TO PAPERWORK MESSED UP FROM RAIN.
Data retrieved from NASA's ASRS site as of January 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.