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A DC10-30 aircraft in cruise was questioned by foreign controller if the flight crew saw close traffic 1000 ft below them. Not only did the reporter flight crew not see any traffic, they also didn't see any on TCASII. Apparently a military P3 flight crew reported a 200 ft near miss and inferred reporter aircraft was off altitude.
| Attributes | |
| ACN | 387027 |
| Time | |
| Date | 199711 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : eggx |
| State Reference | FO |
| Altitude | msl bound lower : 28000 msl bound upper : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-10 30 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : other oceanic enroute : atlantic enroute airway : eggx |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Orion (P3) |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 250 flight time total : 25000 flight time type : 12000 |
| ASRS Report | 387027 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : nmac |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
Narrative:
Received a SELCAL from shanwick asking if we had seen another aircraft at FL280. We never saw another aircraft nor did we ever have a TCASII indication of another aircraft. We were level at FL280 all the way from france. The autoplt was fully functional. A military P3 estimates we passed 200 ft above his level of FL270. Either his altitude was off or his estimate was off because we had another aircraft showing above us at 33 degrees even on our TCASII.
Original NASA ASRS Text
Title: A DC10-30 ACFT IN CRUISE WAS QUESTIONED BY FOREIGN CTLR IF THE FLC SAW CLOSE TFC 1000 FT BELOW THEM. NOT ONLY DID THE RPTR FLC NOT SEE ANY TFC, THEY ALSO DIDN'T SEE ANY ON TCASII. APPARENTLY A MIL P3 FLC RPTED A 200 FT NEAR MISS AND INFERRED RPTR ACFT WAS OFF ALT.
Narrative: RECEIVED A SELCAL FROM SHANWICK ASKING IF WE HAD SEEN ANOTHER ACFT AT FL280. WE NEVER SAW ANOTHER ACFT NOR DID WE EVER HAVE A TCASII INDICATION OF ANOTHER ACFT. WE WERE LEVEL AT FL280 ALL THE WAY FROM FRANCE. THE AUTOPLT WAS FULLY FUNCTIONAL. A MIL P3 ESTIMATES WE PASSED 200 FT ABOVE HIS LEVEL OF FL270. EITHER HIS ALT WAS OFF OR HIS ESTIMATE WAS OFF BECAUSE WE HAD ANOTHER ACFT SHOWING ABOVE US AT 33 DEGS EVEN ON OUR TCASII.
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.