A maintenance technician reported that following the deferral of an engine driven hydraulic; the air...

Narrative:

We were called out to aircraft for a #1 hydraulic system quantity low. Serviced the #1 system in accordance with aircraft maintenance manual (amm). We noticed skydrol leaking out of the #1 engine drain port. Opened the #1 engine cowl and found the #1 engine driven pump (edp) to be leaking when the engine was motored over. Proceeded to remove and perform deactivation procedures of the #1 edp in accordance with amm. After completion of the deactivation ran the #1 engine for leaks and no leaks were noted. Aircraft was then dispatched with a #1 edp deferred.aircraft was dispatched with a #1 edp [deactivated] and was diverted due to #1 engine loss of engine oil resulting in engine shut down.it would be better if the amm would be more detailed in the leak check procedure.

Original NASA ASRS Text

Title: A Maintenance Technician reported that following the deferral of an engine driven hydraulic; the aircraft experienced an inflight engine shutdown due to the loss of engine oil.

Narrative: We were called out to aircraft for a #1 hydraulic system quantity low. Serviced the #1 system in accordance with Aircraft Maintenance Manual (AMM). We noticed Skydrol leaking out of the #1 engine drain port. Opened the #1 engine cowl and found the #1 Engine Driven Pump (EDP) to be leaking when the engine was motored over. Proceeded to remove and perform deactivation procedures of the #1 EDP in accordance with AMM. After completion of the deactivation ran the #1 engine for leaks and no leaks were noted. Aircraft was then dispatched with a #1 EDP deferred.Aircraft was dispatched with a #1 EDP [deactivated] and was diverted due to #1 engine loss of engine oil resulting in engine shut down.It would be better if the AMM would be more detailed in the leak check procedure.

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.

Attributes
ACN	1305894
Time
Date	201509
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Regional Jet 700 ER/LR (CRJ700)
Operating Under FAR Part	Part 121
Flight Phase	Parked
Flight Plan	IFR
Component
Aircraft Component	Powerplant Lubrication System
Person 1
Function	Technician
Qualification	Maintenance Airframe Maintenance Powerplant
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Deviation - Procedural Maintenance

A maintenance technician reported that following the deferral of an engine driven hydraulic; the aircraft experienced an inflight engine shutdown due to the loss of engine oil.