An air carrier medium large transport flight crew has their autoflt system intercept a different approach from the one that they were assigned. The FMS had defaulted to a stored approach and the flight crew were not monitoring the raw data.

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Attributes
ACN	387393
Time
Date	199712
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : sea
State Reference	WA
Altitude	msl bound lower : 8000 msl bound upper : 8000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sea
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent : approach descent 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 : 70 flight time total : 10000 flight time type : 600
ASRS Report	387393
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	non adherence : far non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	flight crew : returned to intended course or assigned course other
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Early in flight, installed glasr 3 arrival per flight plan route and checked FMS route against STAR before starting arrival. After passing glasr intersection, installed the runway 16R into FMS, briefed visual approach backing it up with ILS, and completed checklist for arrival. In a turn to right, approach asked if we were turning on arrival (informed yes). Approach at this point gave us heading and stated there has been a problem on this arrival with FMS equipped aircraft. After parked, examined situation and concluded that the aircraft FMS automatically inserts jacksn FMS without selecting it. The aircraft FMS should always install approachs or never install approachs -- not sometimes install them. Turn was made early and not caught by PF because of speed change request by ATC at jaksn and FMS only shows distance to point, and checked earlier in-flight and correct. Turn made approximately 2 mi early.

Original NASA ASRS Text

Title: AN ACR MLG FLC HAS THEIR AUTOFLT SYS INTERCEPT A DIFFERENT APCH FROM THE ONE THAT THEY WERE ASSIGNED. THE FMS HAD DEFAULTED TO A STORED APCH AND THE FLC WERE NOT MONITORING THE RAW DATA.

Narrative: EARLY IN FLT, INSTALLED GLASR 3 ARR PER FLT PLAN RTE AND CHKED FMS RTE AGAINST STAR BEFORE STARTING ARR. AFTER PASSING GLASR INTXN, INSTALLED THE RWY 16R INTO FMS, BRIEFED VISUAL APCH BACKING IT UP WITH ILS, AND COMPLETED CHKLIST FOR ARR. IN A TURN TO R, APCH ASKED IF WE WERE TURNING ON ARR (INFORMED YES). APCH AT THIS POINT GAVE US HDG AND STATED THERE HAS BEEN A PROB ON THIS ARR WITH FMS EQUIPPED ACFT. AFTER PARKED, EXAMINED SIT AND CONCLUDED THAT THE ACFT FMS AUTOMATICALLY INSERTS JACKSN FMS WITHOUT SELECTING IT. THE ACFT FMS SHOULD ALWAYS INSTALL APCHS OR NEVER INSTALL APCHS -- NOT SOMETIMES INSTALL THEM. TURN WAS MADE EARLY AND NOT CAUGHT BY PF BECAUSE OF SPD CHANGE REQUEST BY ATC AT JAKSN AND FMS ONLY SHOWS DISTANCE TO POINT, AND CHKED EARLIER INFLT AND CORRECT. TURN MADE APPROX 2 MI EARLY.

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.