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An MD80 deferred pack flow control valve was reactivated and restored to normal per the MEL. Technician failed to connect pack valve sense line.
| Attributes | |
| ACN | 675733 |
| Time | |
| Date | 200510 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 675733 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : published procedure non adherence : far |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other |
| Factors | |
| Maintenance | contributing factor : manuals contributing factor : schedule pressure performance deficiency : non compliance with legal requirements performance deficiency : installation performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
Pilots wrote up 'normal condition.' the flight crew and maintenance agreed on the condition. I went to clear the placard for the flow control valve. I looked at the mpm to see if I needed to reconnect anything. I scanned the procedures for mpm; and missed seeing the pack sense line disconnect. I assumed nothing was removed or disconnected. The aircraft returned to the gate. I then realized I missed reconnecting the pack sense line. I will read the mpm slower. I allowed the pressure of a delay to cause me to scan the mpm. I do not normally clear placards on through trips; was not aware of pack sense line disconnected; the departure time caused me to rush.
Original NASA ASRS Text
Title: AN MD80 DEFERRED PACK FLOW CTL VALVE WAS REACTIVATED AND RESTORED TO NORMAL PER THE MEL. TECHNICIAN FAILED TO CONNECT PACK VALVE SENSE LINE.
Narrative: PLTS WROTE UP 'NORMAL CONDITION.' THE FLT CREW AND MAINT AGREED ON THE CONDITION. I WENT TO CLR THE PLACARD FOR THE FLOW CTL VALVE. I LOOKED AT THE MPM TO SEE IF I NEEDED TO RECONNECT ANYTHING. I SCANNED THE PROCS FOR MPM; AND MISSED SEEING THE PACK SENSE LINE DISCONNECT. I ASSUMED NOTHING WAS REMOVED OR DISCONNECTED. THE ACFT RETURNED TO THE GATE. I THEN REALIZED I MISSED RECONNECTING THE PACK SENSE LINE. I WILL READ THE MPM SLOWER. I ALLOWED THE PRESSURE OF A DELAY TO CAUSE ME TO SCAN THE MPM. I DO NOT NORMALLY CLR PLACARDS ON THROUGH TRIPS; WAS NOT AWARE OF PACK SENSE LINE DISCONNECTED; THE DEP TIME CAUSED ME TO RUSH.
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.