The flight crew of a B737 experienced a loss of oil quantity indication during takeoff. While prepar...

Attributes
ACN	1287648
Time
Date	201508
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Route In Use	Vectors
Flight Plan	IFR
Component
Aircraft Component	Oil Contents Indication
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 156 Flight Crew Total 8000 Flight Crew Type 5000
Person 2
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 35 Flight Crew Total 20000 Flight Crew Type 6000
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Track / Heading All Types

Narrative:

During takeoff; just at rotate; I noticed the number 1 engine oil quantity rapidly decreasing towards zero. At gear retraction oil quantity read zero. We requested vectors with tower for a return to the field. We climbed to approximately 4;000 feet and at level off the quantity fluctuated between 0 and 30 percent. Oil pressure was normal during climb out and at level off. The oil quantity eventually stabilized at 30% and all other engine readings were normal. We elected to [advised ATC] and leave the engine running for the return. After clearing the runway we shut down the no. 1 engine for the taxi back to the gate. After takeoff we climbed to the assigned heading and leveled off to assess the situation with the engine. The heading initially pointed us towards a tfr. ATC directed us to turn towards the north to avoid the area. While assessing the situation we missed the call for a turn. I don't think we penetrated the tfr but we perhaps could have turned a bit sooner. We were a little task saturated trying to assess the malfunction.

Original NASA ASRS Text

Title: The flight crew of a B737 experienced a loss of oil quantity indication during takeoff. While preparing for a return to the field; they received a turn away from a TFR that may have been delayed due to their running of the checklist.

Narrative: During takeoff; just at rotate; I noticed the number 1 engine oil quantity rapidly decreasing towards zero. At gear retraction oil quantity read zero. We requested vectors with tower for a return to the field. We climbed to approximately 4;000 feet and at level off the quantity fluctuated between 0 and 30 percent. Oil pressure was normal during climb out and at level off. The oil quantity eventually stabilized at 30% and all other engine readings were normal. We elected to [advised ATC] and leave the engine running for the return. After clearing the runway we shut down the No. 1 engine for the taxi back to the gate. After takeoff we climbed to the assigned heading and leveled off to assess the situation with the engine. The heading initially pointed us towards a TFR. ATC directed us to turn towards the north to avoid the area. While assessing the situation we missed the call for a turn. I don't think we penetrated the TFR but we perhaps could have turned a bit sooner. We were a little task saturated trying to assess the malfunction.

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.

The flight crew of a B737 experienced a loss of oil quantity indication during takeoff. While preparing for a return to the field; they received a turn away from a tfr that may have been delayed due to their running of the checklist.