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Flight crew of MD11 hears another cleared on intersecting airway at same altitude. Flight crew also hears the second aircraft indicate a WX deviation in their direction and sight the lights. Monitoring, they note converging paths and descend to avoid the aircraft. TCASII indicates traffic.
| Attributes | |
| ACN | 397727 |
| Time | |
| Date | 199803 |
| Day | Sat |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : spra |
| State Reference | FO |
| Altitude | msl bound lower : 31000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : sacu |
| Operator | common carrier : air carrier |
| Make Model Name | MD-11 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Route In Use | enroute : atlantic |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute : atlantic |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 397727 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | non adherence : published procedure non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
ATC facility: argentina. Location: north of parana. Our flight and air carrier X were routed north from buenos aires on intersecting airways, both at FL310. We heard the other flight advise ATC that they were deviating west for WX and we saw their lights visually. A look at our charts showed the possible conflict ahead and we made a note of that and decided to keep them in sight. Aware that we were at the same altitude, we tried to contact them on 130.55 without luck. As our aircraft converged we decided to descend and cross under them. The subsequent TCASII message was simply traffic, probably since we were descending. Later, we did establish radio contact with them. Comment -- radio communication with cordova control is often spotty. You must be alert when flying down south.
Original NASA ASRS Text
Title: FLC OF MD11 HEARS ANOTHER CLRED ON INTERSECTING AIRWAY AT SAME ALT. FLC ALSO HEARS THE SECOND ACFT INDICATE A WX DEV IN THEIR DIRECTION AND SIGHT THE LIGHTS. MONITORING, THEY NOTE CONVERGING PATHS AND DSND TO AVOID THE ACFT. TCASII INDICATES TFC.
Narrative: ATC FACILITY: ARGENTINA. LOCATION: N OF PARANA. OUR FLT AND ACR X WERE ROUTED N FROM BUENOS AIRES ON INTERSECTING AIRWAYS, BOTH AT FL310. WE HEARD THE OTHER FLT ADVISE ATC THAT THEY WERE DEVIATING W FOR WX AND WE SAW THEIR LIGHTS VISUALLY. A LOOK AT OUR CHARTS SHOWED THE POSSIBLE CONFLICT AHEAD AND WE MADE A NOTE OF THAT AND DECIDED TO KEEP THEM IN SIGHT. AWARE THAT WE WERE AT THE SAME ALT, WE TRIED TO CONTACT THEM ON 130.55 WITHOUT LUCK. AS OUR ACFT CONVERGED WE DECIDED TO DSND AND CROSS UNDER THEM. THE SUBSEQUENT TCASII MESSAGE WAS SIMPLY TFC, PROBABLY SINCE WE WERE DSNDING. LATER, WE DID ESTABLISH RADIO CONTACT WITH THEM. COMMENT -- RADIO COM WITH CORDOVA CTL IS OFTEN SPOTTY. YOU MUST BE ALERT WHEN FLYING DOWN SOUTH.
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.