Narrative:

This report is being submitted to report a low altitude wake turbulence encounter and provide feedback for assistance with tracking the performance of the new upset recovery training program. On arrival to rjaa [we] encountered wake turbulence at approximately 3000 ft MSL and 200 KTS with autopilot B engaged and flaps 1 set. The flight had just broken into VMC conditions with light rain; solid cloud layers above and some sct cloud layers below. Rjaa radar was vectoring the flight on a left base leg (heading west) to join final for rjaa ILS-Y 16L with the first officer performing PF duties while the ca was pm. As the controller issued a speed reduction the aircraft began to rapidly but lightly bounce; pitch and roll around its axis for a few seconds before rolling abruptly to the left. The 'bank angle - bank angle' aural alert sounded and the PF immediately executed the upset recovery procedure as the aircraft was approximately 45 degrees angle of bank left wing down.scanning the pilot direction indicator for recovery; the ca thought the lateral flight mode annunciator switched to control wheel steering just before the autopilot was disconnected. After the autopilot and auto throttle were disconnected; the first officer/PF pushed the nose down slightly and rolled wings level rapidly; checked airspeed and recovered to level flight; airspeed did not vary by more than 5-10 knots during the event. The ca/pm reset the mode control panel and the autopilot and auto throttle were reengaged afterward. Following this upset recovery event the crew made sure everything was okay; evaluated the situation; and the flight then joined the ILS final and safely landed on runway 16L.

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Original NASA ASRS Text

Title: Air carrier Captain reported encountering wake turbulence on arrival into RJAA.

Narrative: This report is being submitted to report a low altitude wake turbulence encounter and provide feedback for assistance with tracking the performance of the new Upset Recovery Training program. On arrival to RJAA [we] encountered wake turbulence at approximately 3000 ft MSL and 200 KTS with autopilot B engaged and flaps 1 set. The flight had just broken into VMC conditions with light rain; solid cloud layers above and some SCT cloud layers below. RJAA Radar was vectoring the flight on a left base leg (heading west) to join final for RJAA ILS-Y 16L with the FO performing PF duties while the CA was PM. As the Controller issued a speed reduction the aircraft began to rapidly but lightly bounce; pitch and roll around its axis for a few seconds before rolling abruptly to the left. The 'BANK ANGLE - BANK ANGLE' aural alert sounded and the PF immediately executed the upset recovery procedure as the aircraft was approximately 45 degrees angle of bank left wing down.Scanning the Pilot Direction Indicator for recovery; the CA thought the lateral Flight Mode Annunciator switched to Control Wheel Steering just before the autopilot was disconnected. After the autopilot and auto throttle were disconnected; the FO/PF pushed the nose down slightly and rolled wings level rapidly; checked airspeed and recovered to level flight; airspeed did not vary by more than 5-10 knots during the event. The CA/PM reset the Mode Control Panel and the autopilot and auto throttle were reengaged afterward. Following this upset recovery event the crew made sure everything was okay; evaluated the situation; and the flight then joined the ILS final and safely landed on RWY 16L.

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.