Air carrier has failure of #2 omega. #1 omega showed 3 NM error. Center reports air carrier off cour...

Attributes
ACN	131563
Time
Date	198912
Day	Mon
Place
Locale Reference	atc facility : oak
State Reference	CA
Altitude	msl bound lower : 36000 msl bound upper : 36000
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Controlling Facilities	artcc : zoa
Operator	common carrier : air carrier
Make Model Name	Widebody, Low Wing, 4 Turbojet Eng
Flight Phase	cruise other
Route In Use	enroute : other oceanic
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 8000 flight time type : 900
ASRS Report	131563
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : critical non adherence : clearance other spatial deviation
Independent Detector	other controllera other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

1/2-way between hnl and oak we lost #2 omega. We had lost the #2 omega on previous leg to hnl and #1 omega showed 3 NM error on landing. #2 was 'worked on' in hnl. We did not report loss of omega 2 on either leg, and believing #1 omega to be accurate, continued. Upon radar contact by san francisco radar, we were told we were 31 NM north of proper course. The crew erred in not reporting omega loss to alert ATC of possible errors--but condition of navigation equipment and airplanes in this company is below PAR.

Original NASA ASRS Text

Title: ACR HAS FAILURE OF #2 OMEGA. #1 OMEGA SHOWED 3 NM ERROR. CENTER REPORTS ACR OFF COURSE BY 31 NM NORTH.

Narrative: 1/2-WAY BTWN HNL AND OAK WE LOST #2 OMEGA. WE HAD LOST THE #2 OMEGA ON PREVIOUS LEG TO HNL AND #1 OMEGA SHOWED 3 NM ERROR ON LNDG. #2 WAS 'WORKED ON' IN HNL. WE DID NOT RPT LOSS OF OMEGA 2 ON EITHER LEG, AND BELIEVING #1 OMEGA TO BE ACCURATE, CONTINUED. UPON RADAR CONTACT BY SAN FRANCISCO RADAR, WE WERE TOLD WE WERE 31 NM N OF PROPER COURSE. THE CREW ERRED IN NOT RPTING OMEGA LOSS TO ALERT ATC OF POSSIBLE ERRORS--BUT CONDITION OF NAV EQUIP AND AIRPLANES IN THIS COMPANY IS BELOW PAR.

Data retrieved from NASA's ASRS site as of August 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.

Air carrier has failure of #2 omega. #1 omega showed 3 NM error. Center reports air carrier off course by 31 NM north.