An air carrier large transport reports wake turbulence following a B767.

Attributes
ACN	281798
Time
Date	199408
Day	Sat
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : yyz
State Reference	ON
Altitude	agl bound lower : 0 agl bound upper : 50
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tower : yyz
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach landing other
Route In Use	approach : visual arrival other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach landing other
Route In Use	approach : visual arrival other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 200 flight time total : 9000 flight time type : 5000
ASRS Report	281798
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	inflight encounter other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

We were cleared for a visual approach to runway 24L. Tower advised us we were following a B767. We spotted him on final, abeam our position. We were on downwind, offset approximately 3 mi from final approach course. We started our base turn when the 767 had passed by us at our 4 O'clock position. We slowed to approach speed and proceeded visually to the runway. The approach was completely smooth and stable until approximately 50 ft AGL. We encountered the wake turbulence wherein the aircraft began a roll to the right, approximately 10 degrees per second. The captain easily corrected for the roll with aileron but as we passed through the vortex, different amounts of correction were required, resulting in 3-4 rolls approximately 5 degrees either side of vertical. The aircraft passed the area of turbulence, touched down and rolled out uneventfully. During one of the rolls, the right main gear touched down briefly, with little force. Wings were leveled and both mains, then nose gear, touched down. During one of the rolls, I called for a go around, which the captain elected not to do. During our debrief, he stated that would have been an option. (He felt that the magnitude of the encounter did not warrant it.)

Original NASA ASRS Text

Title: AN ACR LGT RPTS WAKE TURB FOLLOWING A B767.

Narrative: WE WERE CLRED FOR A VISUAL APCH TO RWY 24L. TWR ADVISED US WE WERE FOLLOWING A B767. WE SPOTTED HIM ON FINAL, ABEAM OUR POS. WE WERE ON DOWNWIND, OFFSET APPROX 3 MI FROM FINAL APCH COURSE. WE STARTED OUR BASE TURN WHEN THE 767 HAD PASSED BY US AT OUR 4 O'CLOCK POS. WE SLOWED TO APCH SPD AND PROCEEDED VISUALLY TO THE RWY. THE APCH WAS COMPLETELY SMOOTH AND STABLE UNTIL APPROX 50 FT AGL. WE ENCOUNTERED THE WAKE TURB WHEREIN THE ACFT BEGAN A ROLL TO THE R, APPROX 10 DEGS PER SECOND. THE CAPT EASILY CORRECTED FOR THE ROLL WITH AILERON BUT AS WE PASSED THROUGH THE VORTEX, DIFFERENT AMOUNTS OF CORRECTION WERE REQUIRED, RESULTING IN 3-4 ROLLS APPROX 5 DEGS EITHER SIDE OF VERT. THE ACFT PASSED THE AREA OF TURB, TOUCHED DOWN AND ROLLED OUT UNEVENTFULLY. DURING ONE OF THE ROLLS, THE R MAIN GEAR TOUCHED DOWN BRIEFLY, WITH LITTLE FORCE. WINGS WERE LEVELED AND BOTH MAINS, THEN NOSE GEAR, TOUCHED DOWN. DURING ONE OF THE ROLLS, I CALLED FOR A GAR, WHICH THE CAPT ELECTED NOT TO DO. DURING OUR DEBRIEF, HE STATED THAT WOULD HAVE BEEN AN OPTION. (HE FELT THAT THE MAGNITUDE OF THE ENCOUNTER DID NOT WARRANT IT.)

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.