Flight crew deviates off assigned heading causing traffic separation difficulties.

Attributes
ACN	550965
Time
Date	200206
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : cvg.airport
State Reference	KY
Altitude	agl bound lower : 1500 agl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : cvg.tower
Operator	common carrier : air carrier
Make Model Name	MD-88
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	climbout : initial
Route In Use	departure : on vectors
Flight Plan	IFR
Aircraft 2
Controlling Facilities	tower : cvg.tower
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Route In Use	departure : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 350 flight time total : 13000 flight time type : 6000
ASRS Report	550965
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : less severe non adherence : required legal separation non adherence : clearance other spatial deviation
Independent Detector	other controllerb
Resolutory Action	controller : provided flight assist flight crew : returned to intended or assigned course
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On takeoff we received a #2 ahrs failure (attitude and heading reference system). This caused the first officer's heading system and attitude indicator to fail. In the confusion of ascertaining our problem, we drifted left from the runway heading assigned us. Due to other traffic, tower immediately gave us a right turn to 245 degrees to help separation with another aircraft. No TCASII advisories or conflicts were received, but separation was compromised slightly.

Original NASA ASRS Text

Title: FLC DEVIATES OFF ASSIGNED HDG CAUSING TFC SEPARATION DIFFICULTIES.

Narrative: ON TKOF WE RECEIVED A #2 AHRS FAILURE (ATTITUDE AND HDG REF SYS). THIS CAUSED THE FO'S HDG SYS AND ATTITUDE INDICATOR TO FAIL. IN THE CONFUSION OF ASCERTAINING OUR PROB, WE DRIFTED L FROM THE RWY HDG ASSIGNED US. DUE TO OTHER TFC, TWR IMMEDIATELY GAVE US A R TURN TO 245 DEGS TO HELP SEPARATION WITH ANOTHER ACFT. NO TCASII ADVISORIES OR CONFLICTS WERE RECEIVED, BUT SEPARATION WAS COMPROMISED SLIGHTLY.

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.