B737 on RNAV SID from dfw experiences loss of transition waypoint in FMS route.

Attributes
ACN	674560
Time
Date	200510
Local Time Of Day	1801 To 2400
Place
Locale Reference	intersection : soldo
State Reference	TX
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zfw.artcc
Operator	common carrier : air carrier
Make Model Name	B737 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 : soldo
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial
Experience	flight time last 90 days : 160 flight time total : 8500 flight time type : 1250
ASRS Report	674560
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
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 flight crew : returned to intended or assigned course
Supplementary
Problem Areas	ATC Human Performance Chart Or Publication Flight Crew Human Performance Aircraft
Primary Problem	Ambiguous
Air Traffic Incident	Pilot Deviation

Narrative:

Just east of soldo intersection center asked us to turn 20 degrees left and asked what our next fix was. The computer showed mei. We turned 20 degrees left for eld. The soldo departure includes the points uim and eld prior to mei and after soldo. These points somehow dropped out of our computer. I checked the captain's flight plan in the computer prior to departure and these points were definitely there.

Original NASA ASRS Text

Title: B737 ON RNAV SID FROM DFW EXPERIENCES LOSS OF TRANSITION WAYPOINT IN FMS RTE.

Narrative: JUST E OF SOLDO INTERSECTION CTR ASKED US TO TURN 20 DEGS L AND ASKED WHAT OUR NEXT FIX WAS. THE COMPUTER SHOWED MEI. WE TURNED 20 DEGS L FOR ELD. THE SOLDO DEP INCLUDES THE POINTS UIM AND ELD PRIOR TO MEI AND AFTER SOLDO. THESE POINTS SOMEHOW DROPPED OUT OF OUR COMPUTER. I CHKED THE CAPT'S FLT PLAN IN THE COMPUTER PRIOR TO DEP AND THESE POINTS WERE DEFINITELY THERE.

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.