Two line mechanics were informed about a B737-700 aircraft that had lost 'a' system electric hydraul...

Attributes
ACN	1025116
Time
Date	201207
Local Time Of Day	0601-1200
Environment
Light	Daylight
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Hydraulic System Pump
Person 1
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Person 2
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy

Narrative:

'A' system electric hydraulic pump removed and replaced on a B737-700 aircraft; job completed working with aircraft maintenance technician (amt) 'Y'. Amt Y performed the pump replacement and cleanup of the work area after job completion. I assisted with tools; parts support and signing-off the logbook after job completion. Approximately four flight legs later; the crew reported having an 'a' system electric low pressure light and a circuit breaker (C/B) popped. Contract maintenance was called and re-secured the supply line from the reservoir to the pump and reset the C/B. Pump operated normal and aircraft continued. Possible [lack of] attention to detail. We were not under pressure or in a hurry; were given plenty of time. [Recommend] triple/quadruple check all connections.

Original NASA ASRS Text

Title: Two Line Mechanics were informed about a B737-700 aircraft that had lost 'A' System Electric Hydraulic pressure at a gate. Aircraft had flown only five flights since they had replaced the 'A' System Electric Hydraulic Pump.

Narrative: 'A' System Electric Hydraulic Pump removed and replaced on a B737-700 aircraft; job completed working with Aircraft Maintenance Technician (AMT) 'Y'. AMT Y performed the pump replacement and cleanup of the work area after job completion. I assisted with tools; parts support and signing-off the logbook after job completion. Approximately four flight legs later; the crew reported having an 'A' System Electric low pressure light and a Circuit Breaker (C/B) popped. Contract Maintenance was called and re-secured the supply line from the reservoir to the pump and reset the C/B. Pump operated normal and aircraft continued. Possible [lack of] attention to detail. We were not under pressure or in a hurry; were given plenty of time. [Recommend] triple/quadruple check all connections.

Data retrieved from NASA's ASRS site as of July 2013 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.

Two line mechanics were informed about a B737-700 aircraft that had lost 'a' system electric hydraulic pressure at a gate. Aircraft had flown only five flights since they had replaced the 'a' system electric hydraulic pump.