Heading track position deviation in a night operation by air carrier frtr using omega.

Attributes
ACN	252032
Time
Date	199309
Day	Thu
Local Time Of Day	0001 To 0600
Place
Locale Reference	atc facility : pmd
State Reference	CA
Altitude	msl bound lower : 35000 msl bound upper : 35000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zla
Operator	common carrier : air carrier
Make Model Name	Large Transport
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : direct enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 10500 flight time type : 6000
ASRS Report	252032
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe non adherence : clearance other spatial deviation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance controller : provided flight assist other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation

Narrative:

Cleared direct sdf to ont via omega. Final course correction 30 degrees left at 30 DME via radar vector (ATC). Omega on landing had 18 mi error even though adequate signal strength. Aircraft with single omega installed. Written up after landing in logbook.

Original NASA ASRS Text

Title: HDG TRACK POS DEV IN A NIGHT OP BY ACR FRTR USING OMEGA.

Narrative: CLRED DIRECT SDF TO ONT VIA OMEGA. FINAL COURSE CORRECTION 30 DEGS L AT 30 DME VIA RADAR VECTOR (ATC). OMEGA ON LNDG HAD 18 MI ERROR EVEN THOUGH ADEQUATE SIGNAL STRENGTH. ACFT WITH SINGLE OMEGA INSTALLED. WRITTEN UP AFTER LNDG IN LOGBOOK.

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.