Flight crew experienced dual omega failure.

Attributes
ACN	297272
Time
Date	199502
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mia
State Reference	FL
Aircraft 1
Controlling Facilities	artcc : muha artcc : zma tower : spi
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	297272
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
ASRS Report	297273
Events
Anomaly	aircraft equipment problem : critical non adherence : clearance other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem flight crew : became reoriented
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Shortly after takeoff we received clearance from mia #1 omega ambiguity light illuminated. #2 omega appeared normal. We started navigating to tadpo using #2 omega. #1 omega was updated using non precision method. Both omegas appeared to be functioning normally. Mia ATC gave us clearance and confirmation heading direct cayo largo NDB. It became apparent the #2 omega was now showing erroneous indications. Both 1 and 2 omega ambiguity lights came on. We notified first mia then havana of our problem then requested and received clearance to varder using raw data. Over varder performed unsuccessful precision updated to both omegas. After consulting with dispatch determined we could continue the flight using raw data only. All preflight -- runway and after takeoff position checks were performed as per operations procedure. All check normal.

Original NASA ASRS Text

Title: FLC EXPERIENCED DUAL OMEGA FAILURE.

Narrative: SHORTLY AFTER TKOF WE RECEIVED CLRNC FROM MIA #1 OMEGA AMB LIGHT ILLUMINATED. #2 OMEGA APPEARED NORMAL. WE STARTED NAVIGATING TO TADPO USING #2 OMEGA. #1 OMEGA WAS UPDATED USING NON PRECISION METHOD. BOTH OMEGAS APPEARED TO BE FUNCTIONING NORMALLY. MIA ATC GAVE US CLRNC AND CONFIRMATION HDG DIRECT CAYO LARGO NDB. IT BECAME APPARENT THE #2 OMEGA WAS NOW SHOWING ERRONEOUS INDICATIONS. BOTH 1 AND 2 OMEGA AMB LIGHTS CAME ON. WE NOTIFIED FIRST MIA THEN HAVANA OF OUR PROB THEN REQUESTED AND RECEIVED CLRNC TO VARDER USING RAW DATA. OVER VARDER PERFORMED UNSUCCESSFUL PRECISION UPDATED TO BOTH OMEGAS. AFTER CONSULTING WITH DISPATCH DETERMINED WE COULD CONTINUE THE FLT USING RAW DATA ONLY. ALL PREFLT -- RWY AND AFTER TKOF POS CHKS WERE PERFORMED AS PER OPS PROC. ALL CHK NORMAL.

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.