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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Adjacent foreign ATC facility hands off an air carrier in non radar environment at wrong altitude resulting in less than standard separation.
| Attributes | |
| ACN | 258048 |
| Time | |
| Date | 199311 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : mam |
| State Reference | FO |
| Altitude | msl bound lower : 29000 msl bound upper : 37000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : mmty |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : other oceanic enroute airway : zhu |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other |
| Route In Use | enroute : other oceanic |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : non radar |
| Qualification | controller : developmental |
| Experience | controller non radar : 1 |
| ASRS Report | 258048 |
| Person 2 | |
| Affiliation | government other |
| Function | controller : non radar |
| Qualification | controller : non radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 90000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Inter Facility Coordination Failure Operational Error |
Narrative:
I was working non radar oceanic control (non radar d-side). At approximately XX25 am, air carrier X and air carrier Y were verbally coordinated from monterey center to be nebound on A634 estimating argus intersection. Air carrier X was coordinated to be estimating argus at XX17Z at FL370. Air carrier Y was coordinated to be estimating argus at XX28 at FL290. At approximately XX25Z, air carrier Y came on frequency estimating argus at XX25Z level at FL370. Air carrier X and air carrier Y were 7 mins in trail at FL370 (standard separation is 15 mins in trail). Air carrier X was climbed immediately to FL390. When monterey was asked to verify altitude, they replied that he was now estimating argus 3 mins early at XX25Z level at FL290. They seemed unaware of the pilot's true altitude.
Original NASA ASRS Text
Title: ADJACENT FOREIGN ATC FACILITY HANDS OFF AN ACR IN NON RADAR ENVIRONMENT AT WRONG ALT RESULTING IN LTSS.
Narrative: I WAS WORKING NON RADAR OCEANIC CTL (NON RADAR D-SIDE). AT APPROX XX25 AM, ACR X AND ACR Y WERE VERBALLY COORDINATED FROM MONTEREY CTR TO BE NEBOUND ON A634 ESTIMATING ARGUS INTXN. ACR X WAS COORDINATED TO BE ESTIMATING ARGUS AT XX17Z AT FL370. ACR Y WAS COORDINATED TO BE ESTIMATING ARGUS AT XX28 AT FL290. AT APPROX XX25Z, ACR Y CAME ON FREQ ESTIMATING ARGUS AT XX25Z LEVEL AT FL370. ACR X AND ACR Y WERE 7 MINS IN TRAIL AT FL370 (STANDARD SEPARATION IS 15 MINS IN TRAIL). ACR X WAS CLBED IMMEDIATELY TO FL390. WHEN MONTEREY WAS ASKED TO VERIFY ALT, THEY REPLIED THAT HE WAS NOW ESTIMATING ARGUS 3 MINS EARLY AT XX25Z LEVEL AT FL290. THEY SEEMED UNAWARE OF THE PLT'S TRUE ALT.
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.