B733 flight crew misinterped a departure SID and failed to make a required turn.

Attributes
ACN	493990
Time
Date	200012
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : pxr.vortac
State Reference	AZ
Altitude	msl single value : 7000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	tracon : p50.tracon
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other vortac
Flight Phase	climbout : vacating altitude
Route In Use	departure sid : dryht 2. dryht
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 15000 flight time type : 6000
ASRS Report	493990
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : multi engine pilot : instrument
Experience	flight time last 90 days : 210 flight time total : 7200 flight time type : 4350
ASRS Report	494229
Events
Anomaly	non adherence : company policies non adherence : clearance non adherence : published procedure other spatial deviation
Independent Detector	other controllera
Resolutory Action	flight crew : returned to original clearance
Supplementary
Problem Areas	Chart Or Publication Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Departed phx at approximately XA20 on runway 7O. Climbed out via dryheat 2 SID, passed over the VOR and tracked outbound via the pxr 070N degree radial. At approximately 8-10 DME, the controller directed us to change course to a 100 degree heading in accordance with the SID. We realized that we should have made the turn at 4 DME to a heading of 100 degrees. Since I had flown the old departure many times, I failed to notice the change in the new SID.

Original NASA ASRS Text

Title: B733 FLC MISINTERPED A DEP SID AND FAILED TO MAKE A REQUIRED TURN.

Narrative: DEPARTED PHX AT APPROX XA20 ON RWY 7O. CLBED OUT VIA DRYHEAT 2 SID, PASSED OVER THE VOR AND TRACKED OUTBOUND VIA THE PXR 070N DEG RADIAL. AT APPROX 8-10 DME, THE CTLR DIRECTED US TO CHANGE COURSE TO A 100 DEG HDG IN ACCORDANCE WITH THE SID. WE REALIZED THAT WE SHOULD HAVE MADE THE TURN AT 4 DME TO A HDG OF 100 DEGS. SINCE I HAD FLOWN THE OLD DEP MANY TIMES, I FAILED TO NOTICE THE CHANGE IN THE NEW SID.

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.