Narrative:

During departure from pdx, in compliance with company runway 20 noise abatement procedure, a right turn was commenced to 290 degrees. Pdx tower advised our flight to turn left back ot a heading of 200 degrees, and requested confirmation that we had been given the pdx 4 departure in our clearance. A heading of 200 degrees was then regained, and the flight continued routinely. Clearance: cleared to los angeles as filed via pdx 4 departure. Climb and maintain 9000'.' note: pdx 4 departure heading and company special page procedure for runway 20 required different headings after takeoff. I should have confirmed proper heading to fly, with the tower controller or clearance delivery. Company special procedures should be incorporated on the particular departure page, to eliminate any conflict such as this happening in the future.

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Original NASA ASRS Text

Title: FLT CREW OF MLG FOLLOWED COMPANY NOISE ABATEMENT PROC AFTER TKOF PDX. DEP CTLR CORRECTED FLT BACK TO PDX 4 DEP.

Narrative: DURING DEP FROM PDX, IN COMPLIANCE WITH COMPANY RWY 20 NOISE ABATEMENT PROC, A RIGHT TURN WAS COMMENCED TO 290 DEGS. PDX TWR ADVISED OUR FLT TO TURN LEFT BACK OT A HDG OF 200 DEGS, AND REQUESTED CONFIRMATION THAT WE HAD BEEN GIVEN THE PDX 4 DEP IN OUR CLRNC. A HDG OF 200 DEGS WAS THEN REGAINED, AND THE FLT CONTINUED ROUTINELY. CLRNC: CLRED TO LOS ANGELES AS FILED VIA PDX 4 DEP. CLB AND MAINTAIN 9000'.' NOTE: PDX 4 DEP HDG AND COMPANY SPECIAL PAGE PROC FOR RWY 20 REQUIRED DIFFERENT HDGS AFTER TKOF. I SHOULD HAVE CONFIRMED PROPER HDG TO FLY, WITH THE TWR CTLR OR CLRNC DELIVERY. COMPANY SPECIAL PROCS SHOULD BE INCORPORATED ON THE PARTICULAR DEP PAGE, TO ELIMINATE ANY CONFLICT SUCH AS THIS HAPPENING IN THE FUTURE.

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.