B767-300 flight crew reported deviating from charted departure procedure at rksi when they encounter...

Attributes
ACN	1069385
Time
Date	201302
Local Time Of Day	1801-2400
Place
Locale Reference	RKSI.Airport
State Reference	FO
Environment
Flight Conditions	Mixed
Light	Night
Aircraft 1
Make Model Name	B767-300 and 300 ER
Operating Under FAR Part	Part 125
Flight Phase	Initial Climb
Route In Use	SID ENKAS 1G
Flight Plan	IFR
Aircraft 2
Make Model Name	Airbus Industrie Undifferentiated or Other Model
Flight Phase	Initial Climb
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Engineer Flight Crew Instrument
Experience	Flight Crew Last 90 Days 189 Flight Crew Total 26000 Flight Crew Type 8200
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 200 Flight Crew Total 17000 Flight Crew Type 4500
Events
Anomaly	Deviation - Altitude Crossing Restriction Not Met Deviation - Altitude Overshoot Deviation - Procedural Clearance Inflight Event / Encounter Wake Vortex Encounter

Narrative:

[We were] operating out of rksi (seoul/incheon). ATC clearance received: 'enkas 1G departure; maintain FL290; squawk XXXX'. [We] departed runway 33L behind heavy airbus. At 400 ft AGL 'LNAV' was selected. At 1;000 ft AGL 'VNAV' selected and flaps retracted to 5; autopilot engaged. At approximately 1;800 ft MSL encountered heavy wake turbulence from preceding airbus; aircraft rolled quickly 20 degrees left. At this point I selected flight lever change to maintain present speed and increase climb rate to climb above the wake turbulence. Continued this climb rate until above 5;000 ft MSL where a more normal climb rate was established. At 6;500 MSL seoul departure advised level off at 7;000 MSL; we leveled at 7;000 MSL and reported level to ATC. I than realized we had climbed above the 5;500 MSL altitude restriction required by waypoint (S1752) that was still 4 miles in front of us. We maintained 7;000 MSL for several minutes and than were re-cleared to FL290. The problem was caused when I selected flight level change; this took us out of 'VNAV' and we lost the vertical protection the flight guidance system would have given us. To prevent this recurrence; the practice of setting the altitude restriction in the MCP instead of the 'cleared to' fl would have prevented this from happening when operating in either 'level change' or 'VNAV'. Factors human performance: operating at 0130 per body clock.

Original NASA ASRS Text

Title: B767-300 flight crew reported deviating from charted departure procedure at RKSI when they encountered wake turbulence in trail of heavy Airbus.

Narrative: [We were] operating out of RKSI (Seoul/Incheon). ATC clearance received: 'ENKAS 1G departure; maintain FL290; Squawk XXXX'. [We] departed Runway 33L behind heavy Airbus. At 400 FT AGL 'LNAV' was selected. At 1;000 FT AGL 'VNAV' selected and flaps retracted to 5; autopilot engaged. At approximately 1;800 FT MSL encountered heavy wake turbulence from preceding Airbus; aircraft rolled quickly 20 degrees left. At this point I selected Flight Lever Change to maintain present speed and increase climb rate to climb above the wake turbulence. Continued this climb rate until above 5;000 FT MSL where a more normal climb rate was established. At 6;500 MSL Seoul Departure advised level off at 7;000 MSL; we leveled at 7;000 MSL and reported level to ATC. I than realized we had climbed above the 5;500 MSL altitude restriction required by waypoint (S1752) that was still 4 miles in front of us. We maintained 7;000 MSL for several minutes and than were re-cleared to FL290. The problem was caused when I selected Flight Level Change; this took us out of 'VNAV' and we lost the vertical protection the flight guidance system would have given us. To prevent this recurrence; the practice of setting the altitude restriction in the MCP instead of the 'cleared to' FL would have prevented this from happening when operating in either 'Level Change' or 'VNAV'. Factors Human Performance: Operating at 0130 per body clock.

Data retrieved from NASA's ASRS site as of July 2013 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.

B767-300 flight crew reported deviating from charted departure procedure at rksi when they encountered wake turbulence in trail of heavy airbus.