Air carrier large transport deviated from clearance route sea anc.

Attributes
ACN	124682
Time
Date	198910
Day	Wed
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : sea
State Reference	WA
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute airway : j501 enroute airway : j133
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 5000
ASRS Report	124682
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Supplementary
Primary Problem	Airport
Air Traffic Incident	Pilot Deviation

Narrative:

My company uses 2 different routes between sea and anc. The outside route (sea-J523 tou J501 yzp.fired.eeden. Snout J111 anc) for large transport type B. The inside route (sea-J523 tou J501 bka J133 anc) for large transport type a. Our error, was assuming the company dispatcher had filed us the same routing as depicted on our computer flight plan. We were flight xx sea-anc. Normally this flight is an large transport type B but instead, the company swapped airplanes to a large transport type a (without life rafts/RNAV etc). We needed to be filed on the inside route and our computer flight plan depicted us on the inside route. Everything seemed to be ok. I copied our clearance as filed (caf) and the flight proceeded normally, till about 15 northwest of yzp when vancouver center asked us 'where 'ya going' and I told him bka J133 anc. He responded, ok, I have you filed over FIR4D and eeden (outside route), you're not cleared to anc as you stated. Don't trust dispatch to refile your clearance for irregularities. Ask for and receive a full route clearance. Don't assume!

Original NASA ASRS Text

Title: ACR LGT DEVIATED FROM CLRNC ROUTE SEA ANC.

Narrative: MY COMPANY USES 2 DIFFERENT ROUTES BETWEEN SEA AND ANC. THE OUTSIDE ROUTE (SEA-J523 TOU J501 YZP.FIRED.EEDEN. SNOUT J111 ANC) FOR LGT TYPE B. THE INSIDE ROUTE (SEA-J523 TOU J501 BKA J133 ANC) FOR LGT TYPE A. OUR ERROR, WAS ASSUMING THE COMPANY DISPATCHER HAD FILED US THE SAME ROUTING AS DEPICTED ON OUR COMPUTER FLT PLAN. WE WERE FLT XX SEA-ANC. NORMALLY THIS FLT IS AN LGT TYPE B BUT INSTEAD, THE COMPANY SWAPPED AIRPLANES TO A LGT TYPE A (WITHOUT LIFE RAFTS/RNAV ETC). WE NEEDED TO BE FILED ON THE INSIDE ROUTE AND OUR COMPUTER FLT PLAN DEPICTED US ON THE INSIDE ROUTE. EVERYTHING SEEMED TO BE OK. I COPIED OUR CLRNC AS FILED (CAF) AND THE FLT PROCEEDED NORMALLY, TILL ABOUT 15 NW OF YZP WHEN VANCOUVER CENTER ASKED US 'WHERE 'YA GOING' AND I TOLD HIM BKA J133 ANC. HE RESPONDED, OK, I HAVE YOU FILED OVER FIR4D AND EEDEN (OUTSIDE ROUTE), YOU'RE NOT CLRED TO ANC AS YOU STATED. DON'T TRUST DISPATCH TO REFILE YOUR CLRNC FOR IRREGULARITIES. ASK FOR AND RECEIVE A FULL ROUTE CLRNC. DON'T ASSUME!

Data retrieved from NASA's ASRS site as of August 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.