Air carrier medium large transport deviated from clearance route.

Attributes
ACN	86568
Time
Date	198804
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : okc
State Reference	OK
Altitude	msl bound lower : 5000 msl bound upper : 15000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : okc
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : 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 : 250 flight time total : 10000 flight time type : 3500
ASRS Report	86568
Person 2
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : less severe other spatial deviation
Independent Detector	other controllera other flight crewa
Resolutory Action	aircraft : equipment problem dissipated flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Made normal takeoff at okc. Clearance was left turn to 100 degrees to intercept 121 degree right okc. Aircraft was light and climbing fast. Handed off to ZFW center and requested direct buv when available. Noticed CDI's were indicating opp (captain full left, first officer full right displacement). Checked RMI and showed we were in the vicinity of arwy. Switched navigation receivers and still got same indication. RMI indicated we were paralleling arwy north of course. Center asked if we were north of course and we concurred and correcting back. He remarked that departure control had called and stated we appeared to be north of course. I said, 'roger,' and asked if there was a problem. He said no problem and cleared us direct buv. I called departure control back to confirm our clearance and asked him if there was a problem and he said negative. Flight was routinely completed. Navigation receivers were checked in normal on buv VOR and found to be operating ok.

Original NASA ASRS Text

Title: ACR MLG DEVIATED FROM CLRNC ROUTE.

Narrative: MADE NORMAL TKOF AT OKC. CLRNC WAS LEFT TURN TO 100 DEGS TO INTERCEPT 121 DEG R OKC. ACFT WAS LIGHT AND CLBING FAST. HANDED OFF TO ZFW CENTER AND REQUESTED DIRECT BUV WHEN AVAILABLE. NOTICED CDI'S WERE INDICATING OPP (CAPT FULL LEFT, F/O FULL RIGHT DISPLACEMENT). CHKED RMI AND SHOWED WE WERE IN THE VICINITY OF ARWY. SWITCHED NAV RECEIVERS AND STILL GOT SAME INDICATION. RMI INDICATED WE WERE PARALLELING ARWY N OF COURSE. CENTER ASKED IF WE WERE N OF COURSE AND WE CONCURRED AND CORRECTING BACK. HE REMARKED THAT DEP CTL HAD CALLED AND STATED WE APPEARED TO BE N OF COURSE. I SAID, 'ROGER,' AND ASKED IF THERE WAS A PROB. HE SAID NO PROB AND CLRED US DIRECT BUV. I CALLED DEP CTL BACK TO CONFIRM OUR CLRNC AND ASKED HIM IF THERE WAS A PROB AND HE SAID NEGATIVE. FLT WAS ROUTINELY COMPLETED. NAV RECEIVERS WERE CHKED IN NORMAL ON BUV VOR AND FOUND TO BE OPERATING OK.

Data retrieved from NASA's ASRS site as of August 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.