Narrative:

At approximately 30 mi south of kraft on amber 300 from sju to jfk, while using omega navigation the aircraft made a 20 degree bank and left turn on a direct course to draft. We received a warning light, an ambiguity light and dead reckoning light. We checked the malfunction code and consulted the book, and warnings indicated an internal system failure. The system was unusable, so we used the computer flight plan for heading information and flew with the ADF head on 176 degrees, informed ny radio on high frequency that we had lost our omega and we were dead reckoning on A-300 to jfk and reminded them of that at every position report. We had bermuda on one navigation and stations off the east coast on the other radio. Our TCASII on the 40 mi scale to watch for other aircraft. We began to receive orf and attempted to call ny center to inform them we were west of course. When we made contact, they informed us that the military radar had us in contact and they knew where we were. They gave us a heading for jfk and we landed. I think one of the new hand-held GNS system would be a handy machine to keep in your bag just in case it happens again.

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Original NASA ASRS Text

Title: HDG TRACK AND POS DEV AFTER ACFT EQUIP PROBLEM DEVELOPS IN NAV EQUIP.

Narrative: AT APPROX 30 MI S OF KRAFT ON AMBER 300 FROM SJU TO JFK, WHILE USING OMEGA NAV THE ACFT MADE A 20 DEG BANK AND L TURN ON A DIRECT COURSE TO DRAFT. WE RECEIVED A WARNING LIGHT, AN AMBIGUITY LIGHT AND DEAD RECKONING LIGHT. WE CHKED THE MALFUNCTION CODE AND CONSULTED THE BOOK, AND WARNINGS INDICATED AN INTERNAL SYS FAILURE. THE SYS WAS UNUSABLE, SO WE USED THE COMPUTER FLT PLAN FOR HDG INFO AND FLEW WITH THE ADF HEAD ON 176 DEGS, INFORMED NY RADIO ON HIGH FREQ THAT WE HAD LOST OUR OMEGA AND WE WERE DEAD RECKONING ON A-300 TO JFK AND REMINDED THEM OF THAT AT EVERY POS RPT. WE HAD BERMUDA ON ONE NAV AND STATIONS OFF THE E COAST ON THE OTHER RADIO. OUR TCASII ON THE 40 MI SCALE TO WATCH FOR OTHER ACFT. WE BEGAN TO RECEIVE ORF AND ATTEMPTED TO CALL NY CTR TO INFORM THEM WE WERE W OF COURSE. WHEN WE MADE CONTACT, THEY INFORMED US THAT THE MIL RADAR HAD US IN CONTACT AND THEY KNEW WHERE WE WERE. THEY GAVE US A HDG FOR JFK AND WE LANDED. I THINK ONE OF THE NEW HAND-HELD GNS SYS WOULD BE A HANDY MACHINE TO KEEP IN YOUR BAG JUST IN CASE IT HAPPENS AGAIN.

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.