MD80 encounters triss RNAV SID transition anomaly.

Attributes
ACN	700701
Time
Date	200606
Local Time Of Day	0601 To 1200
Place
Locale Reference	intersection : shero
State Reference	TX
Altitude	msl single value : 33000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : d10.tracon
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Route In Use	departure sid : triss
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	700701
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
ASRS Report	700700
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
Supplementary
Problem Areas	Chart Or Publication Flight Crew Human Performance Aircraft
Primary Problem	Ambiguous

Narrative:

Just prior to shero intersection on the triss 2 RNAV departure; my first officer and I noticed that 'shero' intersection had dropped from my departure page. The box had somehow (and I'm not sure how) dropped shero and was going direct to txk from triss. While correcting back to shero to proceed outbound on course; departure control noticed our deviation and inquired if we had been cleared direct to txk. We said no; and we requested direct to txk which the controller approved. I was very humiliated that I did not catch this sooner. It won't happen again; that's for sure.

Original NASA ASRS Text

Title: MD80 ENCOUNTERS TRISS RNAV SID TRANSITION ANOMALY.

Narrative: JUST PRIOR TO SHERO INTXN ON THE TRISS 2 RNAV DEP; MY FO AND I NOTICED THAT 'SHERO' INTXN HAD DROPPED FROM MY DEP PAGE. THE BOX HAD SOMEHOW (AND I'M NOT SURE HOW) DROPPED SHERO AND WAS GOING DIRECT TO TXK FROM TRISS. WHILE CORRECTING BACK TO SHERO TO PROCEED OUTBOUND ON COURSE; DEP CTL NOTICED OUR DEV AND INQUIRED IF WE HAD BEEN CLRED DIRECT TO TXK. WE SAID NO; AND WE REQUESTED DIRECT TO TXK WHICH THE CTLR APPROVED. I WAS VERY HUMILIATED THAT I DID NOT CATCH THIS SOONER. IT WON'T HAPPEN AGAIN; THAT'S FOR SURE.

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.