B737NG captain reported two flight attendants suffered minor injuries as a result of a wake turbulen...

Attributes
ACN	1561736
Time
Date	201807
Local Time Of Day	1201-1800
Place
Locale Reference	ZAU.ARTCC
State Reference	IL
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737 Next Generation Undifferentiated
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Type 2548
Events
Anomaly	Inflight Event / Encounter Wake Vortex Encounter

Narrative:

In the clear. Reports from ATC were occasional light chop. Not near any convective activity. Suspect large brief jolt which was completely unexpected may have been crossing aircraft wake turbulence. I did not notice the aircraft but copilot did after the fact on TCAS. Aircraft was 2000' above and at about 8 [o'clock] position and 30 miles when copilot pointed it out to me. [One of our] flight attendant's complained of back pain after incident. Also [another] flight attendant complained of neck pain after incident. They were up in the aisle with the drink cart when jolt happened.

Original NASA ASRS Text

Title: B737NG Captain reported two Flight Attendants suffered minor injuries as a result of a wake turbulence encounter at FL340 apparently from another aircraft crossing their path at FL360.

Narrative: In the clear. Reports from ATC were occasional light chop. Not near any convective activity. Suspect large brief jolt which was completely unexpected may have been crossing aircraft wake turbulence. I did not notice the aircraft but copilot did after the fact on TCAS. Aircraft was 2000' above and at about 8 [o'clock] position and 30 miles when copilot pointed it out to me. [One of our] FA's complained of back pain after incident. Also [another] FA complained of neck pain after incident. They were up in the aisle with the drink cart when jolt happened.

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.

B737NG captain reported two flight attendants suffered minor injuries as a result of a wake turbulence encounter at FL340 apparently from another aircraft crossing their path at FL360.