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Foreign military Y non compliance with ATC clearance had less than standard separation from MTR X TCASII RA evasive action taken.
| Attributes | |
| ACN | 253092 |
| Time | |
| Date | 199310 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : zin |
| State Reference | FO |
| Altitude | msl bound lower : 24000 msl bound upper : 24000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zma |
| Operator | other |
| Make Model Name | Medium Large Transport |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Military Transport |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller military : 4 controller non radar : 4 controller radar : 3 |
| ASRS Report | 253092 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : flight data |
| Qualification | controller : developmental controller : non radar |
| ASRS Report | 253006 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation non adherence : far non adherence : clearance other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 6000 vertical : 0 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Mlt X reported an near midair collision with another mlt at FL240. The other mlt turned out to be a foreign mlt Y who was off course and early. Due to limited radar coverage in that area, I was unable to provide advance warning to the mlt X. I did not see the foreign mlt Y until after the incident and he was on the beacon code. The transponder was intermittent and not giving mode C information. In that airspace radar coverage provides only secondary targets. No primaries are available. Callback conversation with reporter revealed the following: reporter stated the aircraft missed by less than 1 mi. Military X saw military Y on TCASII. Evasive action taken turn. Foreign military Y flight crew did not contact the center at center boundary as required by international NOTAM for area. Supplemental information from acn 253006: an aircraft reported he came 'real close' to a similar type aircraft. It turns out that the other aircraft's non-radar estimate was at a much earlier time and therefore the two should not have been in conflict.
Original NASA ASRS Text
Title: FOREIGN MIL Y NON COMPLIANCE WITH ATC CLRNC HAD LTSS FROM MTR X TCASII RA EVASIVE ACTION TAKEN.
Narrative: MLT X RPTED AN NMAC WITH ANOTHER MLT AT FL240. THE OTHER MLT TURNED OUT TO BE A FOREIGN MLT Y WHO WAS OFF COURSE AND EARLY. DUE TO LIMITED RADAR COVERAGE IN THAT AREA, I WAS UNABLE TO PROVIDE ADVANCE WARNING TO THE MLT X. I DID NOT SEE THE FOREIGN MLT Y UNTIL AFTER THE INCIDENT AND HE WAS ON THE BEACON CODE. THE XPONDER WAS INTERMITTENT AND NOT GIVING MODE C INFO. IN THAT AIRSPACE RADAR COVERAGE PROVIDES ONLY SECONDARY TARGETS. NO PRIMARIES ARE AVAILABLE. CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING: RPTR STATED THE ACFT MISSED BY LESS THAN 1 MI. MIL X SAW MIL Y ON TCASII. EVASIVE ACTION TAKEN TURN. FOREIGN MIL Y FLC DID NOT CONTACT THE CTR AT CTR BOUNDARY AS REQUIRED BY INTL NOTAM FOR AREA. SUPPLEMENTAL INFORMATION FROM ACN 253006: AN ACFT RPTED HE CAME 'REAL CLOSE' TO A SIMILAR TYPE ACFT. IT TURNS OUT THAT THE OTHER ACFT'S NON-RADAR ESTIMATE WAS AT A MUCH EARLIER TIME AND THEREFORE THE TWO SHOULD NOT HAVE BEEN IN CONFLICT.
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.