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CL60 experiences wake turbulence on kayoh STAR to sna. Possibly from B767 descending for lgb 12 mi ahead.
| Attributes | |
| ACN | 716142 |
| Time | |
| Date | 200611 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sct.tracon |
| State Reference | CA |
| Altitude | msl single value : 8000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | general aviation : corporate |
| Make Model Name | Challenger CL601 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : vacating altitude descent : approach |
| Route In Use | arrival star : kayoh 4 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : sct.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : multi engine pilot : cfi pilot : instrument |
| Experience | flight time last 90 days : 60 flight time total : 6500 flight time type : 2400 |
| ASRS Report | 716142 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Events | |
| Anomaly | inflight encounter : wake turbulence |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : anomaly accepted |
| Supplementary | |
| Problem Areas | Airspace Structure Aircraft Environmental Factor |
| Primary Problem | Environmental Factor |
Narrative:
We were 1 mi from kayoh on the KAYOH4 arrival into sna; and approximately 12 mi before had been given a 260 degree heading after crossing kayoh. The first officer was flying. Just passing kayoh and we were given a descent to 6000 ft and were getting ready for our turn to 260 degree heading and immediately started to experience a light to moderate chop followed by a slight roll to the right and left. The first officer who was flying disconnected the autoplt and tried to initiate the turn to the heading of 260 degrees; but was unable to initiate the turn due to the wake turbulence as he was trying to get the right turn started; but we were fighting against a roll to the left. The bank angle varied once to approximately 30 degrees. We leveled out at approximately 7600 ft; thinking we would stay above the wake turbulence; as we thought it was from another airplane we were following into sna. The winds at the altitude we were at were out of the nnw at 3 KTS. After approximately 10 seconds we were out of the wake turbulence; and queried socal approach as to what plane we were following and how close he was; as we did not see another plane on our TCAS at the 10 mi scale. Socal responded that there was a B767 on the arrival to lgb that we had been following; but he was 12 mi in front of us. We advised him that we just experienced wake turbulence from the aircraft. Socal proceeded to just give us our descent clearance again; and we responded that we would wait a few seconds to ensure we would not experience any further wake.
Original NASA ASRS Text
Title: CL60 EXPERIENCES WAKE TURB ON KAYOH STAR TO SNA. POSSIBLY FROM B767 DSNDING FOR LGB 12 MI AHEAD.
Narrative: WE WERE 1 MI FROM KAYOH ON THE KAYOH4 ARR INTO SNA; AND APPROX 12 MI BEFORE HAD BEEN GIVEN A 260 DEG HDG AFTER XING KAYOH. THE FO WAS FLYING. JUST PASSING KAYOH AND WE WERE GIVEN A DSCNT TO 6000 FT AND WERE GETTING READY FOR OUR TURN TO 260 DEG HDG AND IMMEDIATELY STARTED TO EXPERIENCE A LIGHT TO MODERATE CHOP FOLLOWED BY A SLIGHT ROLL TO THE R AND L. THE FO WHO WAS FLYING DISCONNECTED THE AUTOPLT AND TRIED TO INITIATE THE TURN TO THE HDG OF 260 DEGS; BUT WAS UNABLE TO INITIATE THE TURN DUE TO THE WAKE TURB AS HE WAS TRYING TO GET THE R TURN STARTED; BUT WE WERE FIGHTING AGAINST A ROLL TO THE L. THE BANK ANGLE VARIED ONCE TO APPROX 30 DEGS. WE LEVELED OUT AT APPROX 7600 FT; THINKING WE WOULD STAY ABOVE THE WAKE TURB; AS WE THOUGHT IT WAS FROM ANOTHER AIRPLANE WE WERE FOLLOWING INTO SNA. THE WINDS AT THE ALT WE WERE AT WERE OUT OF THE NNW AT 3 KTS. AFTER APPROX 10 SECONDS WE WERE OUT OF THE WAKE TURB; AND QUERIED SOCAL APCH AS TO WHAT PLANE WE WERE FOLLOWING AND HOW CLOSE HE WAS; AS WE DID NOT SEE ANOTHER PLANE ON OUR TCAS AT THE 10 MI SCALE. SOCAL RESPONDED THAT THERE WAS A B767 ON THE ARR TO LGB THAT WE HAD BEEN FOLLOWING; BUT HE WAS 12 MI IN FRONT OF US. WE ADVISED HIM THAT WE JUST EXPERIENCED WAKE TURB FROM THE ACFT. SOCAL PROCEEDED TO JUST GIVE US OUR DSCNT CLRNC AGAIN; AND WE RESPONDED THAT WE WOULD WAIT A FEW SECONDS TO ENSURE WE WOULD NOT EXPERIENCE ANY FURTHER WAKE.
Data retrieved from NASA's ASRS site as of January 2009 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.