<< >> NASA ASRS Report 1678927, August 2019

B787 first officer reported loss of left engine oil quantity; resulting in a return to departure airport.

Attributes
ACN	1678927
Time
Date	201908
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B787-800
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Oil Distribution
Person 1
Function	First Officer
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

At cruise; pilots noticed oil quantity declining in left engine. When it got to 8 quarts; they pulled left throttle to idle; turned around; descended and headed back to ZZZ. [Left] engine remained at idle and oil quantity remained at 8 quarts for the remainder of the flight. [The cause was a] high pressure oil component leaked.

Related reports:

• B757 first officer reported a fuel leak from the left engine...
• B737 first officer reported experiencing an engine failure d...
• First officer reported left engine failure on climb out; res...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: B787 First Officer reported loss of left engine oil quantity; resulting in a return to departure airport.

Narrative: At cruise; pilots noticed oil quantity declining in left engine. When it got to 8 quarts; they pulled left throttle to idle; turned around; descended and headed back to ZZZ. [Left] engine remained at idle and oil quantity remained at 8 quarts for the remainder of the flight. [The cause was a] high pressure oil component leaked.

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.