MD80 flight crew has a track heading deviation during the nobly 2 RNAV departure from dfw.

Attributes
ACN	709839
Time
Date	200607
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dfw.airport
State Reference	TX
Altitude	msl single value : 23000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zfw.artcc
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Route In Use	departure sid : nobly.two
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	709839
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	709850
Events
Anomaly	non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Aircraft Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

After takeoff on the nobly 2 SID; selected navigation at 400 ft and given normal speed. Autoplt was engaged at 10000 ft or so. Prior to cuzen we were given direct nobly. At FL230 we were contacted by ZFW and asked what fix we were proceeding to. I replied lit. He then said for us to fly direct ortro intersection and that they have been experiencing dropouts of cobug and ortro from many aircraft. He said that there was no conflict. We continued without further incident.

Original NASA ASRS Text

Title: MD80 FLT CREW HAS A TRACK HDG DEV DURING THE NOBLY 2 RNAV DEP FROM DFW.

Narrative: AFTER TKOF ON THE NOBLY 2 SID; SELECTED NAV AT 400 FT AND GIVEN NORMAL SPD. AUTOPLT WAS ENGAGED AT 10000 FT OR SO. PRIOR TO CUZEN WE WERE GIVEN DIRECT NOBLY. AT FL230 WE WERE CONTACTED BY ZFW AND ASKED WHAT FIX WE WERE PROCEEDING TO. I REPLIED LIT. HE THEN SAID FOR US TO FLY DIRECT ORTRO INTXN AND THAT THEY HAVE BEEN EXPERIENCING DROPOUTS OF COBUG AND ORTRO FROM MANY ACFT. HE SAID THAT THERE WAS NO CONFLICT. WE CONTINUED WITHOUT FURTHER INCIDENT.

Data retrieved from NASA's ASRS site as of January 2009 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.