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An MD80 was dispatched in non compliance with the forward drain valve wiring disconnected for troubleshooting but not reconnected.
| Attributes | |
| ACN | 583860 |
| Time | |
| Date | 200306 |
| 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 |
| Qualification | technician : airframe technician : powerplant |
| ASRS Report | 583860 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | oversight : supervisor |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : company policies non adherence : far non adherence : published procedure |
| Independent Detector | other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure contributing factor : work cards performance deficiency : repair performance deficiency : scheduled maintenance performance deficiency : testing performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
I was troubleshooting the drain valve power circuit breaker (B1-842) popping when 'system pressurized.' I found the circuit breaker was popping when the selector switch was positioned to drain. My troubleshooting led me to wire M637022 between P1-652 and 53-292-2. My shift ended before I completed the repair. P1-652 and 53-292 were not reconnected. I gave a turnover believing work would continue on problem. When I returned to work the following week, I inquired about the fix on the drain valve. No one knew about the fix. Tuesday I learned the write-up had been lost and that a supervisor signed off the duplicate. When I asked him how he fixed the problem he said they pressurized the system and found no problem. He was unsure if anyone had reconnected P1-652 and 53-292-2, or if any repairs had been done. He believed the system was working properly at the time he signed the card.
Original NASA ASRS Text
Title: AN MD80 WAS DISPATCHED IN NON COMPLIANCE WITH THE FORWARD DRAIN VALVE WIRING DISCONNECTED FOR TROUBLESHOOTING BUT NOT RECONNECTED.
Narrative: I WAS TROUBLESHOOTING THE DRAIN VALVE PWR CIRCUIT BREAKER (B1-842) POPPING WHEN 'SYS PRESSURIZED.' I FOUND THE CIRCUIT BREAKER WAS POPPING WHEN THE SELECTOR SWITCH WAS POSITIONED TO DRAIN. MY TROUBLESHOOTING LED ME TO WIRE M637022 BTWN P1-652 AND 53-292-2. MY SHIFT ENDED BEFORE I COMPLETED THE REPAIR. P1-652 AND 53-292 WERE NOT RECONNECTED. I GAVE A TURNOVER BELIEVING WORK WOULD CONTINUE ON PROB. WHEN I RETURNED TO WORK THE FOLLOWING WEEK, I INQUIRED ABOUT THE FIX ON THE DRAIN VALVE. NO ONE KNEW ABOUT THE FIX. TUESDAY I LEARNED THE WRITE-UP HAD BEEN LOST AND THAT A SUPVR SIGNED OFF THE DUPLICATE. WHEN I ASKED HIM HOW HE FIXED THE PROB HE SAID THEY PRESSURIZED THE SYS AND FOUND NO PROB. HE WAS UNSURE IF ANYONE HAD RECONNECTED P1-652 AND 53-292-2, OR IF ANY REPAIRS HAD BEEN DONE. HE BELIEVED THE SYS WAS WORKING PROPERLY AT THE TIME HE SIGNED THE CARD.
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.