B737NG maintenance crew reported that after they accomplished tasks on number one and two engines; t...

Attributes
ACN	1513281
Time
Date	201801
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	B737 Next Generation Undifferentiated
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Hydraulic System Pump
Person 1
Function	Technician
Person 2
Function	Technician
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Deviation - Procedural Maintenance

Narrative:

Task cards were performed on the number 1 and number 2 engines. I performed the task card on the number 2 engine and leak checked the number 1 engine. A different aircraft maintenance technician performed the task on the number 1 engine and I verified the leak check as instructed per the task card. No leaks were observed during the dry motor of the engines or during cowl close up. The following morning it was reported that there was an engine-driven hydraulic pump failure on the number 1 engine enroute. [I suggest having] the task card specify to have a different aircraft maintenance technician check security of quick disconnect fittings as well as leak check.

Original NASA ASRS Text

Title: B737NG Maintenance crew reported that after they accomplished tasks on number one and two engines; the next day; the aircraft had an inflight Engine Driven Hydraulic Pump failure.

Narrative: Task cards were performed on the number 1 and number 2 engines. I performed the task card on the number 2 engine and leak checked the number 1 engine. A different Aircraft Maintenance Technician performed the task on the number 1 engine and I verified the leak check as instructed per the task card. No leaks were observed during the dry motor of the engines or during cowl close up. The following morning it was reported that there was an engine-driven hydraulic pump failure on the number 1 engine enroute. [I suggest having] the task card specify to have a different Aircraft Maintenance Technician check security of quick disconnect fittings as well as leak check.

Data retrieved from NASA's ASRS site 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.

B737NG maintenance crew reported that after they accomplished tasks on number one and two engines; the next day; the aircraft had an inflight engine driven hydraulic pump failure.