Narrative:

Flying as a regional carrier, we descend and fly below the jets on most of our arrs, powder.2 in this case. We descended to 16000 ft. Air carrier DC10 was cleared to FL190. We could hear his communication with approach control. As we got in closer to den, we descended/leveled at 10000 ft, DC10 at 11000 ft. The controller turned us in a zigzag fashion with vectors to pass behind and underneath the DC10 twice. Both times we experienced moderate jolts of turbulence. The DC10 made approach and landing to runway 7. We followed on a vector that appeared it might take us again into his turbulence and queried the controller this time. We did not find his wake closer to the ground. Callback conversation with reporter revealed the following information: this dash 8-200 flight crew had several encounters with a DC10-10's wake while being vectored for an approach to a runway 7 approach at den. The initial wake encounter occurred at the dvv 222/50 then at least 3 more incidents, according to the reporter. He said that each was like hitting a speed bump. There was no rolling moment only an up and down movement that was of very short duration. The DC10 was about 3000 ft above the dash when the flight crew first saw it and remained above them until turning to final for runway 7. The reporter said that they never got closer than 8 NM in trail of the DC10. The flight crew reported their initial jolt to the controller and she then gave them a standard wake advisory of aircraft type and range. However, the reporter said that this same controller later became irritated when the flight crew attempted to avoid yet another vector through the dc 10's wake. The flight crew followed the DC10 to runway 7, but stayed high on final approach and had no encounters during that part of the flight.

Related reports:

Google
 

Original NASA ASRS Text

Title: A DASH 8-200 ACR FLC HAS SEVERAL WAKE ENCOUNTERS BEHIND A DC10-10 WHILE BEING VECTORED FOR AN APCH TO RWY 7 AT DEN. THE DC10 WAS AHEAD AND ABOVE THE DASH 8 DURING THE PORTION OF THE APCH UP TO THE FAF WHERE THE FLC FINALLY WAS ABLE TO STAY HIGHER THAN THE DC 10 AND AVOID ITS WAKE.

Narrative: FLYING AS A REGIONAL CARRIER, WE DSND AND FLY BELOW THE JETS ON MOST OF OUR ARRS, POWDER.2 IN THIS CASE. WE DSNDED TO 16000 FT. ACR DC10 WAS CLRED TO FL190. WE COULD HEAR HIS COM WITH APCH CTL. AS WE GOT IN CLOSER TO DEN, WE DSNDED/LEVELED AT 10000 FT, DC10 AT 11000 FT. THE CTLR TURNED US IN A ZIGZAG FASHION WITH VECTORS TO PASS BEHIND AND UNDERNEATH THE DC10 TWICE. BOTH TIMES WE EXPERIENCED MODERATE JOLTS OF TURB. THE DC10 MADE APCH AND LNDG TO RWY 7. WE FOLLOWED ON A VECTOR THAT APPEARED IT MIGHT TAKE US AGAIN INTO HIS TURB AND QUERIED THE CTLR THIS TIME. WE DID NOT FIND HIS WAKE CLOSER TO THE GND. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THIS DASH 8-200 FLC HAD SEVERAL ENCOUNTERS WITH A DC10-10'S WAKE WHILE BEING VECTORED FOR AN APCH TO A RWY 7 APCH AT DEN. THE INITIAL WAKE ENCOUNTER OCCURRED AT THE DVV 222/50 THEN AT LEAST 3 MORE INCIDENTS, ACCORDING TO THE RPTR. HE SAID THAT EACH WAS LIKE HITTING A SPD BUMP. THERE WAS NO ROLLING MOMENT ONLY AN UP AND DOWN MOVEMENT THAT WAS OF VERY SHORT DURATION. THE DC10 WAS ABOUT 3000 FT ABOVE THE DASH WHEN THE FLC FIRST SAW IT AND REMAINED ABOVE THEM UNTIL TURNING TO FINAL FOR RWY 7. THE RPTR SAID THAT THEY NEVER GOT CLOSER THAN 8 NM IN TRAIL OF THE DC10. THE FLC RPTED THEIR INITIAL JOLT TO THE CTLR AND SHE THEN GAVE THEM A STANDARD WAKE ADVISORY OF ACFT TYPE AND RANGE. HOWEVER, THE RPTR SAID THAT THIS SAME CTLR LATER BECAME IRRITATED WHEN THE FLC ATTEMPTED TO AVOID YET ANOTHER VECTOR THROUGH THE DC 10'S WAKE. THE FLC FOLLOWED THE DC10 TO RWY 7, BUT STAYED HIGH ON FINAL APCH AND HAD NO ENCOUNTERS DURING THAT PART OF THE FLT.

Data retrieved from NASA's ASRS site as of July 2007 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.