A course deviation on the skebr RNAV 2 arrival to las, nv.

Attributes
ACN	572588
Time
Date	200302
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	intersection : skebr
State Reference	NV
Altitude	msl single value : 1300
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : l30.tracon
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	descent : approach ground : parked
Route In Use	approach other arrival star : skebr rnav
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 12000 flight time type : 5000
ASRS Report	572588
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	non adherence : clearance non adherence : company policies non adherence : published procedure other anomaly other other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	controller : issued advisory flight crew : returned to intended or assigned course
Consequence	faa : reviewed incident with flight crew other
Supplementary
Problem Areas	Flight Crew Human Performance Aircraft
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

On arrival into las on the skebr 1, we missed the turn from skebr to kepec. The FMC had the aircraft go to shade on runway 25L from skebr. I caught this problem right away and manually turned the aircraft to kepec and then reselected the arrival and re-engaged the FMC. ATC asked if we missed the turn and wanted us to call them. I called ATC specialist first, then called them. After the calls, we rebuilt the flight plan in the FMC and found that if you select ILS runway 25L from departure/approach page, that the FMC dumps the arrival from skebr and gives a discontinuity to shand on runway 25L. I was at fault for not noticing this before skebr. We were both in navigation mode, but the legs page was not up at that time.

Original NASA ASRS Text

Title: A COURSE DEV ON THE SKEBR RNAV 2 ARR TO LAS, NV.

Narrative: ON ARR INTO LAS ON THE SKEBR 1, WE MISSED THE TURN FROM SKEBR TO KEPEC. THE FMC HAD THE ACFT GO TO SHADE ON RWY 25L FROM SKEBR. I CAUGHT THIS PROB RIGHT AWAY AND MANUALLY TURNED THE ACFT TO KEPEC AND THEN RESELECTED THE ARR AND RE-ENGAGED THE FMC. ATC ASKED IF WE MISSED THE TURN AND WANTED US TO CALL THEM. I CALLED ATC SPECIALIST FIRST, THEN CALLED THEM. AFTER THE CALLS, WE REBUILT THE FLT PLAN IN THE FMC AND FOUND THAT IF YOU SELECT ILS RWY 25L FROM DEP/APCH PAGE, THAT THE FMC DUMPS THE ARR FROM SKEBR AND GIVES A DISCONTINUITY TO SHAND ON RWY 25L. I WAS AT FAULT FOR NOT NOTICING THIS BEFORE SKEBR. WE WERE BOTH IN NAV MODE, BUT THE LEGS PAGE WAS NOT UP AT THAT TIME.

Data retrieved from NASA's ASRS site as of July 2007 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.