Flight crew of medium large transport leaves ZOA airspace and travels through ZLA into ZAB airspace with no communication. Believe they missed a frequency change due to blocked transmission. ZAB controller was trying to contact them.

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Attributes
ACN	381767
Time
Date	199709
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : las
State Reference	NV
Altitude	msl bound lower : 37000 msl bound upper : 37000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zab artcc : zla tower : ric
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : atp
Experience	flight time last 90 days : 200 flight time total : 21000 flight time type : 17000
ASRS Report	381767
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	non adherence : published procedure other anomaly other other anomaly other
Independent Detector	other controllera other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Supplementary
Air Traffic Incident	Operational Deviation other

Narrative:

The last contact received by ZOA was just after bty VOR. We could hear oak transmit but never received a frequency change to ZLA. We did not realize that we should have been on ZAB until 90 mi north of phx. We found a frequency on our charts and finally transmitted to ZAB, where abouts they informed us that they had been trying to contact us. We suspect that we missed the frequency change because of a blocked transmission. We never acknowledged any change.

Original NASA ASRS Text

Title: FLC OF MLG LEAVES ZOA AIRSPACE AND TRAVELS THROUGH ZLA INTO ZAB AIRSPACE WITH NO COM. BELIEVE THEY MISSED A FREQ CHANGE DUE TO BLOCKED XMISSION. ZAB CTLR WAS TRYING TO CONTACT THEM.

Narrative: THE LAST CONTACT RECEIVED BY ZOA WAS JUST AFTER BTY VOR. WE COULD HEAR OAK XMIT BUT NEVER RECEIVED A FREQ CHANGE TO ZLA. WE DID NOT REALIZE THAT WE SHOULD HAVE BEEN ON ZAB UNTIL 90 MI N OF PHX. WE FOUND A FREQ ON OUR CHARTS AND FINALLY XMITTED TO ZAB, WHERE ABOUTS THEY INFORMED US THAT THEY HAD BEEN TRYING TO CONTACT US. WE SUSPECT THAT WE MISSED THE FREQ CHANGE BECAUSE OF A BLOCKED XMISSION. WE NEVER ACKNOWLEDGED ANY CHANGE.

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.