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Due to thunderstorm activity, ATC inadvertently assigned the wrong altitude and then intervened to correct the error.
| Attributes | |
| ACN | 316047 |
| Time | |
| Date | 199509 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : abi |
| State Reference | TX |
| Altitude | msl bound lower : 12000 msl bound upper : 13000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw |
| Operator | common carrier : air carrier |
| Make Model Name | Brasilia EMB-120 All Series |
| Operating Under FAR Part | Part 135 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Military Transport |
| Operating Under FAR Part | other : other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 9500 flight time type : 2500 |
| ASRS Report | 316047 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 5000 vertical : 1000 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Upon leaving abi en route to dfw, we were cleared to 12000 ft. Shortly after check-in with ZFW we were given clearance to 13000 ft (which is correct for direction). A few mins later, the controller asked us to verify we were level at 12000 ft. We explained that he gave us a clearance to 13000 ft. He gave us an immediate 50 degree right turn and descent to 12000 ft. He also gave the oncoming traffic a 50 degree turn to the right for separation. We saw the C130 make its turn about 6-8 mi away. Once we were clear of the C130, we were given a climb back to 13000 ft and a turn on course. All the aircraft in the area were deviating around several large thunderstorms and the controller was extremely busy. There was never any danger of collision but evidently some confusion as to who was supposed to be at which altitude.
Original NASA ASRS Text
Title: DUE TO TSTM ACTIVITY, ATC INADVERTENTLY ASSIGNED THE WRONG ALT AND THEN INTERVENED TO CORRECT THE ERROR.
Narrative: UPON LEAVING ABI ENRTE TO DFW, WE WERE CLRED TO 12000 FT. SHORTLY AFTER CHK-IN WITH ZFW WE WERE GIVEN CLRNC TO 13000 FT (WHICH IS CORRECT FOR DIRECTION). A FEW MINS LATER, THE CTLR ASKED US TO VERIFY WE WERE LEVEL AT 12000 FT. WE EXPLAINED THAT HE GAVE US A CLRNC TO 13000 FT. HE GAVE US AN IMMEDIATE 50 DEG R TURN AND DSCNT TO 12000 FT. HE ALSO GAVE THE ONCOMING TFC A 50 DEG TURN TO THE R FOR SEPARATION. WE SAW THE C130 MAKE ITS TURN ABOUT 6-8 MI AWAY. ONCE WE WERE CLR OF THE C130, WE WERE GIVEN A CLB BACK TO 13000 FT AND A TURN ON COURSE. ALL THE ACFT IN THE AREA WERE DEVIATING AROUND SEVERAL LARGE TSTMS AND THE CTLR WAS EXTREMELY BUSY. THERE WAS NEVER ANY DANGER OF COLLISION BUT EVIDENTLY SOME CONFUSION AS TO WHO WAS SUPPOSED TO BE AT WHICH 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.