EMB170 first officer arriving dfw on the BYP5 experiences the FMC reinitializing the arrival from th...

Narrative:

We were on the bonham arrival into dfw. As the flying pilot I had briefed ILS 17C; and inputted it into the FMS. We were descending through seven thousand when we were handed off to approach; who gave us ILS 17L. I changed the runway in the FMS but didn't follow verification procedures. I turned away to brief the approach without confirming my change with the captain; or noticing that the FMS has added all the fixes in the arrival instead of adding just the fixes that we hadn't crossed. Autopilot started making a right turn back to the beginning of the arrival and was about 90 degrees off course when I finished briefing the approach and I looked back up. The captain was also looking for his chart and did not notice the change in heading. I turned back to our course heading. ATC then gave us a heading for vectors to the approach.always follow verification procedures no matter how small the change in the flight plan. If time is a factor; have the pilot not flying brief the approach. Fix the software in the FMS in dfw and lga where it adds all fixes in the arrival with a change in runway instead of adding the fixes that haven't been crossed.

Original NASA ASRS Text

Title: EMB170 First Officer arriving DFW on the BYP5 experiences the FMC reinitializing the arrival from the beginning after a runway change. Error goes unnoticed until 90 degrees of heading change have occurred. Situation is reported to have occurred during arrival to LGA also.

Narrative: We were on the Bonham arrival into DFW. As the flying pilot I had briefed ILS 17C; and inputted it into the FMS. We were descending through seven thousand when we were handed off to approach; who gave us ILS 17L. I changed the runway in the FMS but didn't follow verification procedures. I turned away to brief the approach without confirming my change with the Captain; or noticing that the FMS has added all the fixes in the arrival instead of adding just the fixes that we hadn't crossed. Autopilot started making a right turn back to the beginning of the arrival and was about 90 degrees off course when I finished briefing the approach and I looked back up. The Captain was also looking for his chart and did not notice the change in heading. I turned back to our course heading. ATC then gave us a heading for vectors to the approach.Always follow verification procedures no matter how small the change in the flight plan. If time is a factor; have the pilot not flying brief the approach. Fix the software in the FMS in DFW and LGA where it adds all fixes in the arrival with a change in runway instead of adding the fixes that haven't been crossed.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	938825
Time
Date	201103
Local Time Of Day	0601-1200
Place
Locale Reference	D10.TRACON
State Reference	TX
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	EMB ERJ 170/175 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR BYP5
Flight Plan	IFR
Component
Aircraft Component	FMS/FMC
Person 1
Function	First Officer Pilot Flying
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Clearance Deviation - Track / Heading All Types

EMB170 first officer arriving dfw on the BYP5 experiences the FMC reinitializing the arrival from the beginning after a runway change. Error goes unnoticed until 90 degrees of heading change have occurred. Situation is reported to have occurred during arrival to lga also.