Large transport makes a precautionary landing in bda when their omega navigation proves unreliable.

Attributes
ACN	240831
Time
Date	199305
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : bda
State Reference	FO
Altitude	msl bound lower : 33000 msl bound upper : 33000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : txkf
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 3 Turbojet Eng
Navigation In Use	Other
Flight Phase	cruise other
Route In Use	enroute : atlantic enroute other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 120 flight time total : 21600 flight time type : 120
ASRS Report	240831
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	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Off course deviation due to omega error. Suspect omega error possibly due to portable television set in operation by a passenger. Discovered off course error by inconsistent waypoint estimate and larger than usual heading deviation for wind correction. An unscheduled landing was made at bermuda for omega evaluation. Callback conversation with reporter revealed the following: the flight was from ewr to sxm. 2 mechanics being ferried to repair another aircraft. Flight crew found they were missing their estimates and a check of their latitude/longitude showed far east of where they should have been. After only 1 1/2 hours in flight they could not have been that far off course. Decided to land bda. Advised cabin attendants and they informed that a passenger was watching his television. Took it away from him. Omega realigned itself on touchdown and problem could not be duplicated. Reporter cannot prove the television was the cause of the problem.

Original NASA ASRS Text

Title: LGT MAKES A PRECAUTIONARY LNDG IN BDA WHEN THEIR OMEGA NAV PROVES UNRELIABLE.

Narrative: OFF COURSE DEV DUE TO OMEGA ERROR. SUSPECT OMEGA ERROR POSSIBLY DUE TO PORTABLE TELEVISION SET IN OP BY A PAX. DISCOVERED OFF COURSE ERROR BY INCONSISTENT WAYPOINT ESTIMATE AND LARGER THAN USUAL HDG DEV FOR WIND CORRECTION. AN UNSCHEDULED LNDG WAS MADE AT BERMUDA FOR OMEGA EVALUATION. CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING: THE FLT WAS FROM EWR TO SXM. 2 MECHS BEING FERRIED TO REPAIR ANOTHER ACFT. FLC FOUND THEY WERE MISSING THEIR ESTIMATES AND A CHK OF THEIR LATITUDE/LONGITUDE SHOWED FAR E OF WHERE THEY SHOULD HAVE BEEN. AFTER ONLY 1 1/2 HRS IN FLT THEY COULD NOT HAVE BEEN THAT FAR OFF COURSE. DECIDED TO LAND BDA. ADVISED CABIN ATTENDANTS AND THEY INFORMED THAT A PAX WAS WATCHING HIS TELEVISION. TOOK IT AWAY FROM HIM. OMEGA REALIGNED ITSELF ON TOUCHDOWN AND PROB COULD NOT BE DUPLICATED. RPTR CANNOT PROVE THE TELEVISION WAS THE CAUSE OF THE PROB.

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.