B737-700 flight attendant reported strong 'burning oil' fumes immediately after takeoff in passenger...

Narrative:

Immediately after takeoff out of ZZZ the entire cabin was engulfed with strong fumes smelling like burning oil. The smell was verified with the cockpit (they started using oxygen) and the flight attendant [flight attendant] tried finding the source. All five crew members felt a strong headache; burning in the chest; nose and throat. I felt light headed as well. The fumes never dissipated; so we returned back to ZZZ with fire trucks waiting for us at the end of the runway (no fire). Once we got back to the gate; the operations agent whisked the passengers away to another gate; the mechanics took the plane and all five crew members went to the emergency room. We were told the aircraft had just come back from the hanger and they washed the engines overnight. I have been on planes that just had this done and this was a completely different smell. Since this has happened to me twice within 30 days; I think it would be important to double check the procedure in how the mechanics are washing the engines and making sure the solvent they are using is completely washed out.

Original NASA ASRS Text

Title: B737-700 Flight Attendant reported strong 'burning oil' fumes immediately after takeoff in passenger cabin. Flight executed an uneventful return do departure airport. All crew members received medical treatment for health issues.

Narrative: Immediately after takeoff out of ZZZ the entire cabin was engulfed with strong fumes smelling like burning oil. The smell was verified with the cockpit (they started using oxygen) and the FA [Flight Attendant] tried finding the source. All five crew members felt a strong headache; burning in the chest; nose and throat. I felt light headed as well. The fumes never dissipated; so we returned back to ZZZ with fire trucks waiting for us at the end of the runway (no fire). Once we got back to the gate; the OPS agent whisked the passengers away to another gate; the mechanics took the plane and all five crew members went to the emergency room. We were told the aircraft had just come back from the hanger and they washed the engines overnight. I have been on planes that just had this done and this was a completely different smell. Since this has happened to me twice within 30 days; I think it would be important to double check the procedure in how the mechanics are washing the engines and making sure the solvent they are using is completely washed out.

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	1689183
Time
Date	201906
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Person 1
Function	Flight Attendant In Charge
Qualification	Flight Attendant Current
Events
Anomaly	Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

B737-700 flight attendant reported strong 'burning oil' fumes immediately after takeoff in passenger cabin. Flight executed an uneventful return do departure airport. All crew members received medical treatment for health issues.