B777 loses RNAV SID transition waypoints when the runway is changed prior to takeoff.

Attributes
ACN	674871
Time
Date	200510
Local Time Of Day	0601 To 1200
Place
Locale Reference	intersection : ferra
State Reference	TX
Altitude	msl single value : 26000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zfw.artcc
Operator	common carrier : air carrier
Make Model Name	B777 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure sid : ferra
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	674871
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	674867
Events
Anomaly	aircraft equipment problem : critical non adherence : clearance non adherence : published procedure other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued advisory controller : issued new clearance
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance Chart Or Publication Airport Aircraft
Primary Problem	Ambiguous
Air Traffic Incident	Pilot Deviation

Narrative:

On taxi out we received a runway change from runway 18L to runway 17R. First officer changed runway on route 1 page and captain selected runway 17R and ferra for the departure then we checked waypoints to ferra. On climb out first officer noticed a discontinuity between ferra and ALS. For some reason the CDU dropped scabi and pnh out of the legs page. First officer checked the flight plan and plugged pnh in between ferra and ALS and executed. The captain was not aware of this. After passing ferra the aircraft continued direct to pnh instead of the cleared route to scabi then pnh. While first officer was in the bathroom center called and asked if we were on a heading. I answered that we were direct to pnh as I thought this was the correct routing. Center gave us a heading then direct to scabi to pnh as filed. Miscom and failure to check routing after ferra contributed to this error.

Original NASA ASRS Text

Title: B777 LOSES RNAV SID TRANSITION WAYPOINTS WHEN THE RWY IS CHANGED PRIOR TO TKOF.

Narrative: ON TAXI OUT WE RECEIVED A RWY CHANGE FROM RWY 18L TO RWY 17R. FO CHANGED RWY ON RTE 1 PAGE AND CAPT SELECTED RWY 17R AND FERRA FOR THE DEP THEN WE CHKED WAYPOINTS TO FERRA. ON CLBOUT FO NOTICED A DISCONTINUITY BETWEEN FERRA AND ALS. FOR SOME REASON THE CDU DROPPED SCABI AND PNH OUT OF THE LEGS PAGE. FO CHKED THE FLT PLAN AND PLUGGED PNH IN BETWEEN FERRA AND ALS AND EXECUTED. THE CAPT WAS NOT AWARE OF THIS. AFTER PASSING FERRA THE ACFT CONTINUED DIRECT TO PNH INSTEAD OF THE CLRED RTE TO SCABI THEN PNH. WHILE FO WAS IN THE BATHROOM CTR CALLED AND ASKED IF WE WERE ON A HEADING. I ANSWERED THAT WE WERE DIRECT TO PNH AS I THOUGHT THIS WAS THE CORRECT ROUTING. CTR GAVE US A HEADING THEN DIRECT TO SCABI TO PNH AS FILED. MISCOM AND FAILURE TO CHK ROUTING AFTER FERRA CONTRIBUTED TO THIS ERROR.

Data retrieved from NASA's ASRS site as of January 2009 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.