Flight crew of a B767 failed to follow a change in a SID departure clearance due to frequency congestion and the lateness with which ATC provided the clearance.

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Attributes
ACN	382010
Time
Date	199710
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : las
State Reference	NV
Altitude	msl bound lower : 15000 msl bound upper : 15000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zla tracon : las
Operator	common carrier : air carrier
Make Model Name	B767 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : intermediate altitude
Route In Use	departure other departure sid : sid enroute airway : zla
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : atp
Experience	flight time last 90 days : 180 flight time total : 19000 flight time type : 5000
ASRS Report	382010
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	non adherence : clearance other anomaly other other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

First officer was flying departure. Departing las runway 25R we were cleared via the oveto departure. After takeoff we were told to maintain runway heading for vectors. Eventually we were vectored to an easterly heading with clearance to 15000 ft. Expecting to intercept the oveto departure route on a very busy and congested frequency, we were told to 'fly present heading, intercept the las 039 degree radial to oveto and fly the oveto departure, contact departure on another frequency.' as I switched frequencys, the first officer tuned in the las 039 degree radial and saw we were past it. I asked the new controller for verification of clearance and he said he didn't know what our clearance was, to do what the last controller told us to do, and that he didn't have authority/authorized to give us any turns or to clear us directly to oveto. We maintained heading and intercepted the oveto departure since we could not receive clarification on our clearance.

Original NASA ASRS Text

Title: FLC OF A B767 FAILED TO FOLLOW A CHANGE IN A SID DEP CLRNC DUE TO FREQ CONGESTION AND THE LATENESS WITH WHICH ATC PROVIDED THE CLRNC.

Narrative: FO WAS FLYING DEP. DEPARTING LAS RWY 25R WE WERE CLRED VIA THE OVETO DEP. AFTER TKOF WE WERE TOLD TO MAINTAIN RWY HDG FOR VECTORS. EVENTUALLY WE WERE VECTORED TO AN EASTERLY HDG WITH CLRNC TO 15000 FT. EXPECTING TO INTERCEPT THE OVETO DEP RTE ON A VERY BUSY AND CONGESTED FREQ, WE WERE TOLD TO 'FLY PRESENT HDG, INTERCEPT THE LAS 039 DEG RADIAL TO OVETO AND FLY THE OVETO DEP, CONTACT DEP ON ANOTHER FREQ.' AS I SWITCHED FREQS, THE FO TUNED IN THE LAS 039 DEG RADIAL AND SAW WE WERE PAST IT. I ASKED THE NEW CTLR FOR VERIFICATION OF CLRNC AND HE SAID HE DIDN'T KNOW WHAT OUR CLRNC WAS, TO DO WHAT THE LAST CTLR TOLD US TO DO, AND THAT HE DIDN'T HAVE AUTH TO GIVE US ANY TURNS OR TO CLR US DIRECTLY TO OVETO. WE MAINTAINED HDG AND INTERCEPTED THE OVETO DEP SINCE WE COULD NOT RECEIVE CLARIFICATION ON OUR CLRNC.

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.