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Air carrier X was descended to 11000' should have been assigned 13000'. Operational deviation.
| Attributes | |
| ACN | 142012 |
| Time | |
| Date | 199004 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : tys |
| State Reference | TN |
| Altitude | msl bound lower : 12700 msl bound upper : 13000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : ztl artcc : zau |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | descent other |
| Route In Use | arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 200 flight time total : 1800 flight time type : 200 |
| ASRS Report | 142012 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 4375 flight time type : 2800 |
| ASRS Report | 142244 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : reviewed incident with flight crew Other |
| Miss Distance | unspecified : 30000 vertical : 700 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Deviation |
Narrative:
Air carrier X cleared as filed (cha tys shine shine 1 clt at 15000'). We were approximately 30 NM east of tys on the tys transition to the shine 1 arrival into clt at 15000' MSL. We received a clearance from ZTL to cross 10 east of snowbird at 11000' (which is not on the arrival). The captain questioned the clearance of a snowbird fix--the descent to 11000' was not considered unusual. The controller explained about turboprop arrival gates into clt--'they want you off of snowbird at 13000'. Contact the shine sector on frequency...' we contacted the next sector. By now we had descended out of 15000' to cross 10 east of snowbird at 11000'. We were now passing through 13000 for 11000'. We contacted center and reported out of 13000 for 11000', 10 mi east of snowbird. Center asked us to say altitude again, and called air carrier Y at 12 O'clock at 12000'. We reported we were at 12700' and he ordered an immediate climb back up to 13000'. We climbed back to 13000' and nothing else was said. It was unusual to receive a clearance other than the shine arrival, and one sector had cleared us to an altitude the next sector had traffic in. Callback conversation with reporter revealed the following: reporter stated air carrier Y was an mdt. The flight crew reviewed the wrong altitude assignment with the receiving controller and they had been assigned 11000'. Reporter estimated they were 5 mi from air carrier Y when they were back at 13000'. Routing over snowbird at 13000' was a new procedure that had been started that day.
Original NASA ASRS Text
Title: ACR X WAS DESCENDED TO 11000' SHOULD HAVE BEEN ASSIGNED 13000'. OPERATIONAL DEVIATION.
Narrative: ACR X CLRED AS FILED (CHA TYS SHINE SHINE 1 CLT AT 15000'). WE WERE APPROX 30 NM E OF TYS ON THE TYS TRANSITION TO THE SHINE 1 ARR INTO CLT AT 15000' MSL. WE RECEIVED A CLRNC FROM ZTL TO CROSS 10 E OF SNOWBIRD AT 11000' (WHICH IS NOT ON THE ARR). THE CAPT QUESTIONED THE CLRNC OF A SNOWBIRD FIX--THE DSNT TO 11000' WAS NOT CONSIDERED UNUSUAL. THE CTLR EXPLAINED ABOUT TURBOPROP ARR GATES INTO CLT--'THEY WANT YOU OFF OF SNOWBIRD AT 13000'. CONTACT THE SHINE SECTOR ON FREQ...' WE CONTACTED THE NEXT SECTOR. BY NOW WE HAD DSNDED OUT OF 15000' TO CROSS 10 E OF SNOWBIRD AT 11000'. WE WERE NOW PASSING THROUGH 13000 FOR 11000'. WE CONTACTED CENTER AND RPTED OUT OF 13000 FOR 11000', 10 MI E OF SNOWBIRD. CENTER ASKED US TO SAY ALT AGAIN, AND CALLED ACR Y AT 12 O'CLOCK AT 12000'. WE RPTED WE WERE AT 12700' AND HE ORDERED AN IMMEDIATE CLB BACK UP TO 13000'. WE CLBED BACK TO 13000' AND NOTHING ELSE WAS SAID. IT WAS UNUSUAL TO RECEIVE A CLRNC OTHER THAN THE SHINE ARR, AND ONE SECTOR HAD CLRED US TO AN ALT THE NEXT SECTOR HAD TFC IN. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: RPTR STATED ACR Y WAS AN MDT. THE FLT CREW REVIEWED THE WRONG ALT ASSIGNMENT WITH THE RECEIVING CTLR AND THEY HAD BEEN ASSIGNED 11000'. RPTR ESTIMATED THEY WERE 5 MI FROM ACR Y WHEN THEY WERE BACK AT 13000'. ROUTING OVER SNOWBIRD AT 13000' WAS A NEW PROC THAT HAD BEEN STARTED THAT DAY.
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.