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While conducting interphone coordination, ZJX controller does not hear or respond to WX deviation by an air carrier which conflicts with another air carrier at the same altitude.
| Attributes | |
| ACN | 516893 |
| Time | |
| Date | 200106 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | intersection : ozena |
| State Reference | FL |
| Altitude | msl single value : 33000 |
| Environment | |
| Flight Conditions | Mixed |
| Weather Elements | Thunderstorm |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zjx.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A300 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zjx.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 10 |
| ASRS Report | 516893 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe inflight encounter : weather non adherence : required legal separation non adherence : published procedure other spatial deviation |
| Independent Detector | atc equipment : conflict alert |
| Resolutory Action | controller : issued new clearance |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 19560 vertical : 1000 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance Weather |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft #1 and #2 checked on proceeding northbound. Aircraft #2 was on the left. Aircraft #1 was approximately 60 mi east of aircraft #2. WX was impacting the area and some planes were deviating. Aircraft #1 requested a left deviation for WX of approximately 35 mi. I approved the deviation and proceeded to call ZMA with some coordination. While on the landline, aircraft #1 said he actually needed to deviation about 60 mi east of course. I did not acknowledge because I did not hear the transmission. For a while, aircraft #1 was tracking about 20 degrees left of course. Aircraft #1 then proceeded to turn further northwest. Upon recognizing the tighter convergence, I issued a turn clearance to aircraft #2 and a descent clearance to aircraft #1 and requested an expeditious descent. I then proceeded to turn aircraft #1 20 degrees to the right for further separation. Separation was lost. Upon regaining separation, both aircraft were cleared on course. I was then told by my immediate supervisor as well as the area manager to advise aircraft #1 of a possible pilot deviation, not knowing that he had said he was going to deviation up to 60 mi as opposed to the 35 mi that I had heard and acknowledged.
Original NASA ASRS Text
Title: WHILE CONDUCTING INTERPHONE COORD, ZJX CTLR DOES NOT HEAR OR RESPOND TO WX DEV BY AN ACR WHICH CONFLICTS WITH ANOTHER ACR AT THE SAME ALT.
Narrative: ACFT #1 AND #2 CHKED ON PROCEEDING NBOUND. ACFT #2 WAS ON THE L. ACFT #1 WAS APPROX 60 MI E OF ACFT #2. WX WAS IMPACTING THE AREA AND SOME PLANES WERE DEVIATING. ACFT #1 REQUESTED A L DEV FOR WX OF APPROX 35 MI. I APPROVED THE DEV AND PROCEEDED TO CALL ZMA WITH SOME COORD. WHILE ON THE LANDLINE, ACFT #1 SAID HE ACTUALLY NEEDED TO DEV ABOUT 60 MI E OF COURSE. I DID NOT ACKNOWLEDGE BECAUSE I DID NOT HEAR THE XMISSION. FOR A WHILE, ACFT #1 WAS TRACKING ABOUT 20 DEGS L OF COURSE. ACFT #1 THEN PROCEEDED TO TURN FURTHER NW. UPON RECOGNIZING THE TIGHTER CONVERGENCE, I ISSUED A TURN CLRNC TO ACFT #2 AND A DSCNT CLRNC TO ACFT #1 AND REQUESTED AN EXPEDITIOUS DSCNT. I THEN PROCEEDED TO TURN ACFT #1 20 DEGS TO THE R FOR FURTHER SEPARATION. SEPARATION WAS LOST. UPON REGAINING SEPARATION, BOTH ACFT WERE CLRED ON COURSE. I WAS THEN TOLD BY MY IMMEDIATE SUPVR AS WELL AS THE AREA MGR TO ADVISE ACFT #1 OF A POSSIBLE PLTDEV, NOT KNOWING THAT HE HAD SAID HE WAS GOING TO DEV UP TO 60 MI AS OPPOSED TO THE 35 MI THAT I HAD HEARD AND ACKNOWLEDGED.
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.