Flight crew fails to notice change to filed route and commits navigation error.

Attributes
ACN	433880
Time
Date	199904
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : fmn.vortac
State Reference	NM
Altitude	msl single value : 29000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdv.artcc
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Route In Use	enroute airway : j64.airway
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : instrument pilot : atp pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 10400 flight time type : 920
ASRS Report	433880
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
Events
Anomaly	non adherence : far non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Part of our original release lax to ord (release 01) read: fmn J64 hlc sjc irk. During cockpit setup, release 02, printed on ACARS, required more fuel, which we had already added while at operations. However, we didn't notice a route change fmn J44 ALS J102 sln J96 irk. We received our ATC clearance by voice, no pre departure clearance available, with 'cleared as filed' covering the changed portion. After passing fmn about 80 NM east on J64, ZDV said we were showing north of course. We said we were on our flight planned routing. ZDV then cleared us direct to sln flight plan route. Accepting the new clearance and loading in the new clearance ended the incident. In the future, I will carefully scrutinize any dispatch release update to determine precisely the reason for it.

Original NASA ASRS Text

Title: FLC FAILS TO NOTICE CHANGE TO FILED RTE AND COMMITS NAV ERROR.

Narrative: PART OF OUR ORIGINAL RELEASE LAX TO ORD (RELEASE 01) READ: FMN J64 HLC SJC IRK. DURING COCKPIT SETUP, RELEASE 02, PRINTED ON ACARS, REQUIRED MORE FUEL, WHICH WE HAD ALREADY ADDED WHILE AT OPS. HOWEVER, WE DIDN'T NOTICE A RTE CHANGE FMN J44 ALS J102 SLN J96 IRK. WE RECEIVED OUR ATC CLRNC BY VOICE, NO PDC AVAILABLE, WITH 'CLRED AS FILED' COVERING THE CHANGED PORTION. AFTER PASSING FMN ABOUT 80 NM E ON J64, ZDV SAID WE WERE SHOWING N OF COURSE. WE SAID WE WERE ON OUR FLT PLANNED ROUTING. ZDV THEN CLRED US DIRECT TO SLN FLT PLAN RTE. ACCEPTING THE NEW CLRNC AND LOADING IN THE NEW CLRNC ENDED THE INCIDENT. IN THE FUTURE, I WILL CAREFULLY SCRUTINIZE ANY DISPATCH RELEASE UPDATE TO DETERMINE PRECISELY THE REASON FOR IT.

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.