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A B737-400 right pack turbo fan was improperly deferred inoperative per the MEL. Special procedure to deactivate the control valve was not accomplished.
| Attributes | |
| ACN | 683179 |
| Time | |
| Date | 200512 |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 683179 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : far non adherence : published procedure |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : manuals contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : testing performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Environmental Factor Aircraft Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
Found out on tuesday that the maintenance procedure for the MEL dealing with the right pack turbo fan (can't recall the MEL number) on aircraft was improperly done -- in that maintenance had not manually deactivated the valve. I believe this was supposed to be accomplished by air carrier maintenance.
Original NASA ASRS Text
Title: A B737-400 R PACK TURBO FAN WAS IMPROPERLY DEFERRED INOP PER THE MEL. SPECIAL PROC TO DEACTIVATE THE CTL VALVE WAS NOT ACCOMPLISHED.
Narrative: FOUND OUT ON TUESDAY THAT THE MAINT PROC FOR THE MEL DEALING WITH THE R PACK TURBO FAN (CAN'T RECALL THE MEL NUMBER) ON ACFT WAS IMPROPERLY DONE -- IN THAT MAINT HAD NOT MANUALLY DEACTIVATED THE VALVE. I BELIEVE THIS WAS SUPPOSED TO BE ACCOMPLISHED BY ACR MAINT.
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.