B767 first officer reported deviating from cleared track departing clt on the andys 7 SID when they ...

Narrative:

During initial climb from runway 36C in clt; captain; [pilot] flying; encountered wake turbulence from previously departed airbus. Captain maintained wings-level; proper climb attitude. Normal call-outs and climb procedures were used in a timely manner. After engaging autopilot at 1000 feet; aircraft turned to an intercept heading of about 280 degrees (45 degree intercept angle) to join departure routing on andys seven towards ebawi. Instead of intercepting the departure course; the aircraft maintained heading and flew through the course. Captain intervened by disconnecting autopilot and turned northbound towards ebawi intersection. I have seen the navigation system on these B-767's do this before. It appeared the nav system had already determined we would track past ebawi intersection before intercepting the outbound course due to the 90 degree turn the aircraft would have to make towards ebawi and our close proximity to ebawi. Factors; I believe contributing to this happening: 1. Wake turbulence on initial climb and having to maintain wings level climb attitude till clear of wake turbulence. 2. Low level winds quickly increasing to 36 knots from the west at 1000 feet agl; pushing the aircraft further east. 3. Navigation system recalibrating aircraft position from ground-based navaids after lift-off. 4. Navigation system unable to anticipate early intercept turn to join course; while close to up-coming fix requiring turn back to the same direction as aircraft is currently heading. It appeared; but unsure; that the flight management system defaulted to heading mode. 5. Charted departure procedure depicting initial departure fix 40 degrees 'off' runway heading; instead of having the fix straight out from runway.

Original NASA ASRS Text

Title: B767 First Officer reported deviating from cleared track departing CLT on the ANDYS 7 SID when they encountered wake turbulence from preceding Airbus and the FMS failed to capture the course.

Narrative: During initial climb from Runway 36C in CLT; Captain; [pilot] flying; encountered wake turbulence from previously departed Airbus. Captain maintained wings-level; proper climb attitude. Normal call-outs and climb procedures were used in a timely manner. After engaging autopilot at 1000 feet; aircraft turned to an intercept heading of about 280 degrees (45 degree intercept angle) to join departure routing on ANDYS SEVEN towards EBAWI. Instead of intercepting the departure course; the aircraft maintained heading and flew through the course. Captain intervened by disconnecting autopilot and turned northbound towards EBAWI intersection. I have seen the navigation system on these B-767's do this before. It appeared the nav system had already determined we would track past EBAWI intersection before intercepting the outbound course due to the 90 degree turn the aircraft would have to make towards EBAWI and our close proximity to EBAWI. Factors; I believe contributing to this happening: 1. Wake turbulence on initial climb and having to maintain wings level climb attitude till clear of wake turbulence. 2. Low level winds quickly increasing to 36 knots from the west at 1000 feet agl; pushing the aircraft further east. 3. Navigation system recalibrating aircraft position from ground-based navaids after lift-off. 4. Navigation system unable to anticipate early intercept turn to join course; while close to up-coming fix requiring turn back to the same direction as aircraft is currently heading. It appeared; but unsure; that the Flight Management System defaulted to Heading mode. 5. Charted departure procedure depicting initial departure fix 40 degrees 'off' runway heading; instead of having the fix straight out from runway.

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.

Attributes
ACN	1227015
Time
Date	201412
Local Time Of Day	0601-1200
Place
Locale Reference	CLT.Airport
State Reference	NC
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Initial Climb
Route In Use	SID ANDYS SEVEN
Flight Plan	IFR
Aircraft 2
Make Model Name	Airbus Industrie Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Initial Climb
Component
Aircraft Component	FMS/FMC
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Engineer
Experience	Flight Crew Last 90 Days 270 Flight Crew Total 23000 Flight Crew Type 5000
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Clearance Deviation - Track / Heading All Types Inflight Event / Encounter Wake Vortex Encounter

B767 first officer reported deviating from cleared track departing clt on the andys 7 SID when they encountered wake turbulence from preceding airbus and the FMS failed to capture the course.