Navigation error. Did not notice a clearance amendment on the pre departure clearance.

Attributes
ACN	244001
Time
Date	199306
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : scy
State Reference	TX
Altitude	msl bound lower : 35000 msl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zfw tower : roa
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 75 flight time total : 8500 flight time type : 75
ASRS Report	244001
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Our pre departure clearance showed an amendment to our route but I didn't realize it until I turned to intercept the planned route. ATC asked where we were going, which was my first clue I was off course. The amendment procedure on pdcs is terrible. It is a built-in trap!

Original NASA ASRS Text

Title: NAV ERROR. DID NOT NOTICE A CLRNC AMENDMENT ON THE PDC.

Narrative: OUR PDC SHOWED AN AMENDMENT TO OUR RTE BUT I DIDN'T REALIZE IT UNTIL I TURNED TO INTERCEPT THE PLANNED RTE. ATC ASKED WHERE WE WERE GOING, WHICH WAS MY FIRST CLUE I WAS OFF COURSE. THE AMENDMENT PROC ON PDCS IS TERRIBLE. IT IS A BUILT-IN TRAP!

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.