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A possible track deviation when a cargo DC10 VOR locks out on the gtk VOR on airway BR1L 205 NM northeast of gtk, first officer.
| Attributes | |
| ACN | 541332 |
| Time | |
| Date | 200203 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : gtk.vor |
| State Reference | FO |
| Altitude | msl single value : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Weather Elements | Thunderstorm |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma.artcc tower : msp.tower |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 25000 flight time type : 18000 |
| ASRS Report | 541332 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical inflight encounter : weather non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : unable other |
| Supplementary | |
| Problem Areas | Weather Navigational Facility Flight Crew Human Performance Aircraft Airspace Structure Company |
| Primary Problem | Navigational Facility |
Narrative:
We were filed on a flight plan on BR1L out of grand turk (gtk) VOR going to memphis (mem). At cruise altitude at 205 NM north of gtk on BR1L both vors broke lock at 205 NM. Had to dead reckoned to next navigation point (burgo) 57 mi away, which was a turn point on BR1L to an ADF. The aircraft was a non INS aircraft. The ADF defining burgo was islands (bhf). This ADF was svcable but unusable. There were numerous thunderstorms in the area and the ADF was fluctuating almost constantly between 280 degrees and 330 degrees.
Original NASA ASRS Text
Title: A POSSIBLE TRACK DEV WHEN A CARGO DC10 VOR LOCKS OUT ON THE GTK VOR ON AIRWAY BR1L 205 NM NE OF GTK, FO.
Narrative: WE WERE FILED ON A FLT PLAN ON BR1L OUT OF GRAND TURK (GTK) VOR GOING TO MEMPHIS (MEM). AT CRUISE ALT AT 205 NM N OF GTK ON BR1L BOTH VORS BROKE LOCK AT 205 NM. HAD TO DEAD RECKONED TO NEXT NAV POINT (BURGO) 57 MI AWAY, WHICH WAS A TURN POINT ON BR1L TO AN ADF. THE ACFT WAS A NON INS ACFT. THE ADF DEFINING BURGO WAS ISLANDS (BHF). THIS ADF WAS SVCABLE BUT UNUSABLE. THERE WERE NUMEROUS TSTMS IN THE AREA AND THE ADF WAS FLUCTUATING ALMOST CONSTANTLY BTWN 280 DEGS AND 330 DEGS.
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.