MD80 on RNAV SID from dfw experiences loss of transition waypoints in FMS route.

Attributes
ACN	679100
Time
Date	200511
Local Time Of Day	0601 To 1200
Place
Locale Reference	intersection : tekbe
State Reference	TX
Altitude	msl bound lower : 30000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zfw.artcc
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) 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 : clare
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	679100
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued advisory flight crew : returned to intended or assigned course
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Ambiguous

Narrative:

Climbing out of FL300 for FL330 on clare 2 RNAV departure when controller asked if we were proceeding to tekbe intersection. Since there are no radial/DME nor VOR frequencies on the SID; I had to extend the navigation map display from 40 NM range to 80 NM where the next waypoint would appear. It was swb not tekbe. We re-entered tekbe and resumed the clare 2 departure. The FMS had deleted the tekbe probably when we experienced a marked power interruption just prior to taking the runway for departure. Both the right engine gen coming on line after the single engine taxi and the first officer checking the auxiliary hydraulic pump caused a power demand spike that flashed my displays off momentarily. We had verified all navigation points vs FMS during preflight.

Original NASA ASRS Text

Title: MD80 ON RNAV SID FROM DFW EXPERIENCES LOSS OF TRANSITION WAYPOINTS IN FMS RTE.

Narrative: CLBING OUT OF FL300 FOR FL330 ON CLARE 2 RNAV DEP WHEN CTLR ASKED IF WE WERE PROCEEDING TO TEKBE INTXN. SINCE THERE ARE NO RADIAL/DME NOR VOR FREQUENCIES ON THE SID; I HAD TO EXTEND THE NAV MAP DISPLAY FROM 40 NM RANGE TO 80 NM WHERE THE NEXT WAYPOINT WOULD APPEAR. IT WAS SWB NOT TEKBE. WE RE-ENTERED TEKBE AND RESUMED THE CLARE 2 DEP. THE FMS HAD DELETED THE TEKBE PROBABLY WHEN WE EXPERIENCED A MARKED POWER INTERRUPTION JUST PRIOR TO TAKING THE RWY FOR DEP. BOTH THE R ENG GEN COMING ON LINE AFTER THE SINGLE ENG TAXI AND THE FO CHKING THE AUX HYD PUMP CAUSED A POWER DEMAND SPIKE THAT FLASHED MY DISPLAYS OFF MOMENTARILY. WE HAD VERIFIED ALL NAV POINTS VS FMS DURING PREFLT.

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.