Narrative:

After lifting off of runway 26L phoenix sky harbor the aircraft encountered a dual IRS failure. All primary attitude and directional indications were lost. The departure required a turn of 20 degrees left or left to the heading of 240 degrees. Dealing with the loss of instrumentation and departure duties on the aircraft, we were unable to immediately comply with ATC's request to fly directly to the bxy VOR. After repositioning the magnetic compass (our only directional source) and stabilizing the attitude of the aircraft we began our turn towards bxy VOR. ATC then requested that we level off at an intermediate altitude so there would not be a conflict of traffic. Once we were heading toward bxy, phoenix departure handed us to ZAB where we asked for a safe altitude and heading to familiarize ourselves with this situation. The solution to the ATC problem could easily have been prevented if we would have informed the controller right away of our situation. The loss of all directional information on takeoff drew all of our available resources to controling the aircraft and analyze the unfamiliar situation.

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Original NASA ASRS Text

Title: AN ACR FLC EXPERIENCED A DELAY IN BEING ABLE TO COMPLY WITH ATC CLRNC DUE TO A LOSS OF THE IRS SYS ON THE DEP PROC. NIGHT OP.

Narrative: AFTER LIFTING OFF OF RWY 26L PHOENIX SKY HARBOR THE ACFT ENCOUNTERED A DUAL IRS FAILURE. ALL PRIMARY ATTITUDE AND DIRECTIONAL INDICATIONS WERE LOST. THE DEP REQUIRED A TURN OF 20 DEGS L OR L TO THE HDG OF 240 DEGS. DEALING WITH THE LOSS OF INSTRUMENTATION AND DEP DUTIES ON THE ACFT, WE WERE UNABLE TO IMMEDIATELY COMPLY WITH ATC'S REQUEST TO FLY DIRECTLY TO THE BXY VOR. AFTER REPOSITIONING THE MAGNETIC COMPASS (OUR ONLY DIRECTIONAL SOURCE) AND STABILIZING THE ATTITUDE OF THE ACFT WE BEGAN OUR TURN TOWARDS BXY VOR. ATC THEN REQUESTED THAT WE LEVEL OFF AT AN INTERMEDIATE ALT SO THERE WOULD NOT BE A CONFLICT OF TFC. ONCE WE WERE HDG TOWARD BXY, PHOENIX DEP HANDED US TO ZAB WHERE WE ASKED FOR A SAFE ALT AND HDG TO FAMILIARIZE OURSELVES WITH THIS SIT. THE SOLUTION TO THE ATC PROB COULD EASILY HAVE BEEN PREVENTED IF WE WOULD HAVE INFORMED THE CTLR RIGHT AWAY OF OUR SIT. THE LOSS OF ALL DIRECTIONAL INFO ON TKOF DREW ALL OF OUR AVAILABLE RESOURCES TO CTLING THE ACFT AND ANALYZE THE UNFAMILIAR SIT.

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.