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A DC9-50 was dispatched in non compliance with the spoiler bypass valve in the off position for maintenance. Valve not opened after maintenance.
| Attributes | |
| ACN | 591876 |
| Time | |
| Date | 200308 |
| Day | Wed |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 50 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance lead technician : 13 maintenance technician : 19 |
| ASRS Report | 591876 |
| Person 2 | |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : non compliance with mel maintenance problem : improper documentation 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 : work cards contributing factor : manuals contributing factor : schedule pressure performance deficiency : logbook entry performance deficiency : installation performance deficiency : non compliance with legal requirements performance deficiency : testing |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
Electric hydraulic pump removed and replaced. Mechanic placed spoiler by-pass valve in off position. Mechanic did not tag by-pass valve and by-pass valve was not returned to 'on' position. Result was right hydraulic pressure light stayed illuminated. Maintenance control notified and aircraft was MEL'ed per MEL 29-10 and aircraft taken to gate for revenue flight. Aircraft went from ZZZ to ZZZ1. At ZZZ1 first officer noticed by-pass valve in wrong position on walkaround. ZZZ1 mechanic positioned valve in 'on' position and MEL placard was cleared.
Original NASA ASRS Text
Title: A DC9-50 WAS DISPATCHED IN NON COMPLIANCE WITH THE SPOILER BYPASS VALVE IN THE OFF POS FOR MAINT. VALVE NOT OPENED AFTER MAINT.
Narrative: ELECTRIC HYD PUMP REMOVED AND REPLACED. MECH PLACED SPOILER BY-PASS VALVE IN OFF POS. MECH DID NOT TAG BY-PASS VALVE AND BY-PASS VALVE WAS NOT RETURNED TO 'ON' POS. RESULT WAS R HYD PRESSURE LIGHT STAYED ILLUMINATED. MAINT CTL NOTIFIED AND ACFT WAS MEL'ED PER MEL 29-10 AND ACFT TAKEN TO GATE FOR REVENUE FLT. ACFT WENT FROM ZZZ TO ZZZ1. AT ZZZ1 FO NOTICED BY-PASS VALVE IN WRONG POS ON WALKAROUND. ZZZ1 MECH POSITIONED VALVE IN 'ON' POS AND MEL PLACARD WAS CLRED.
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.