An atx flight crew flying HS125-800 from dal fails to adhere to the published SID.

Attributes
ACN	435870
Time
Date	199905
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : dal.airport
State Reference	TX
Altitude	msl single value : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : d10.tracon
Operator	common carrier : air taxi
Make Model Name	HS 125 Series 700
Operating Under FAR Part	Part 135
Navigation In Use	other
Flight Phase	climbout : initial
Route In Use	departure sid : dale
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : atp pilot : cfi pilot : multi engine
Experience	flight time last 90 days : 80 flight time total : 6600 flight time type : 750
ASRS Report	435874
Person 2
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : multi engine
Events
Anomaly	non adherence : far non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera other flight crewa other flight crewb
Resolutory Action	controller : provided flight assist flight crew : became reoriented
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was preparing the aircraft for the flight. I received the clearance from ATC and I inserted it in the FMS's. The departure instructions were 'dallas 5 SID, txk transition.' I read the textual description of the SID and briefed for departure. When we started taxiing, I briefed him on the SID, telling him that we need to turn to a heading of 100 degrees after departure from runway 13L. Climbing to 2000 ft, I checked in with departure and I was asked what was our heading. When I replied 100 degrees, he asked why and told us to turn to runway heading.

Original NASA ASRS Text

Title: AN ATX FLC FLYING HS125-800 FROM DAL FAILS TO ADHERE TO THE PUBLISHED SID.

Narrative: I WAS PREPARING THE ACFT FOR THE FLT. I RECEIVED THE CLRNC FROM ATC AND I INSERTED IT IN THE FMS'S. THE DEP INSTRUCTIONS WERE 'DALLAS 5 SID, TXK TRANSITION.' I READ THE TEXTUAL DESCRIPTION OF THE SID AND BRIEFED FOR DEP. WHEN WE STARTED TAXIING, I BRIEFED HIM ON THE SID, TELLING HIM THAT WE NEED TO TURN TO A HDG OF 100 DEGS AFTER DEP FROM RWY 13L. CLBING TO 2000 FT, I CHKED IN WITH DEP AND I WAS ASKED WHAT WAS OUR HDG. WHEN I REPLIED 100 DEGS, HE ASKED WHY AND TOLD US TO TURN TO RWY HDG.

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.