Narrative:

On jan/thu/04, I was called out to aircraft to inspect a leak from the wheelwell that the ramp had noticed. I found the 'a' system electric pump to be leaking. At this point the aircraft was taken OTS. Myself and another mechanic changed the pump, and the 'a' system case drain filter. I reattached the 'a' system quick disconnect. I checked for leaks while the other mechanic was in the cockpit running the pump verifying pressure output. Everything checked out. At this point we taxied the aircraft to the gate for a flight that operations needed the aircraft for by XA30. The crew took the aircraft some time later, they called back saying the aircraft lost the 'a' system electric pump. The aircraft returned to the gate, and upon inspection I found the indicator/lock pins on the 'a' system quick disconnect pins were not protruding, which was the reason for the pump to lose the fluid supply. In the heat of the moment trying to make sure the aircraft would make the XA30 departure that it was slotted for, I did not catch that the indicator/lock pins were not protruding from the quick disconnect when I connected it and had in the up position (fully connected).

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Original NASA ASRS Text

Title: A B737-300 WAS DISPATCHED IN NON COMPLIANCE WITH THE 'A' SYS ELECTRIC HYD PUMP QUICK DISCONNECT NOT LOCKED. RETURNED DUE TO LOSS OF 'A' SYS FLUID.

Narrative: ON JAN/THU/04, I WAS CALLED OUT TO ACFT TO INSPECT A LEAK FROM THE WHEELWELL THAT THE RAMP HAD NOTICED. I FOUND THE 'A' SYS ELECTRIC PUMP TO BE LEAKING. AT THIS POINT THE ACFT WAS TAKEN OTS. MYSELF AND ANOTHER MECH CHANGED THE PUMP, AND THE 'A' SYS CASE DRAIN FILTER. I REATTACHED THE 'A' SYS QUICK DISCONNECT. I CHKED FOR LEAKS WHILE THE OTHER MECH WAS IN THE COCKPIT RUNNING THE PUMP VERIFYING PRESSURE OUTPUT. EVERYTHING CHKED OUT. AT THIS POINT WE TAXIED THE ACFT TO THE GATE FOR A FLT THAT OPS NEEDED THE ACFT FOR BY XA30. THE CREW TOOK THE ACFT SOME TIME LATER, THEY CALLED BACK SAYING THE ACFT LOST THE 'A' SYS ELECTRIC PUMP. THE ACFT RETURNED TO THE GATE, AND UPON INSPECTION I FOUND THE INDICATOR/LOCK PINS ON THE 'A' SYS QUICK DISCONNECT PINS WERE NOT PROTRUDING, WHICH WAS THE REASON FOR THE PUMP TO LOSE THE FLUID SUPPLY. IN THE HEAT OF THE MOMENT TRYING TO MAKE SURE THE ACFT WOULD MAKE THE XA30 DEP THAT IT WAS SLOTTED FOR, I DID NOT CATCH THAT THE INDICATOR/LOCK PINS WERE NOT PROTRUDING FROM THE QUICK DISCONNECT WHEN I CONNECTED IT AND HAD IN THE UP POS (FULLY CONNECTED).

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.