A line mechanic reports he forgot to re-connect the #2 engine hydraulic case drain line to the engin...

Attributes
ACN	870299
Time
Date	201001
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Night
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Parked
Component
Aircraft Component	Filter
Person 1
Function	Technician
Qualification	Maintenance Powerplant Maintenance Airframe
Experience	Maintenance Technician 26
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy

Narrative:

After completing job card for (case drain filter replacement) leak check and clean-up; the quick disconnect case drain line to the pylon was not re-connected. Unfortunately this resulted in an air return due to loss of hydraulic pressure and fluid causing the engine pump to fail. I requested that the job card have a separate mechanic and/or inspector buy back. By having this additional step will hopefully ensure that this area will not be over looked in the future.

Original NASA ASRS Text

Title: A Line Mechanic reports he forgot to re-connect the #2 engine hydraulic case drain line to the engine pylon of a B737-800. The loss of hydraulic pressure and fluid caused the #2 engine driven hydraulic pump to fail resulting in an air turnback by the flight crew.

Narrative: After completing job card for (case drain filter replacement) leak check and clean-up; the quick disconnect case drain line to the pylon was not re-connected. Unfortunately this resulted in an air return due to loss of hydraulic pressure and fluid causing the engine pump to fail. I requested that the job card have a separate Mechanic and/or Inspector buy back. By having this additional step will hopefully ensure that this area will not be over looked in the future.

Data retrieved from NASA's ASRS site as of April 2012 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.

A line mechanic reports he forgot to re-connect the #2 engine hydraulic case drain line to the engine pylon of a B737-800. The loss of hydraulic pressure and fluid caused the #2 engine driven hydraulic pump to fail resulting in an air turnback by the flight crew.