 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Reporter flight acknowledged descent clearance and began descent. ATC advised clearance was for another aircraft with similar call sign but ATC had not acknowledged readback.
| Attributes | |
| ACN | 121368 |
| Time | |
| Date | 198908 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : dfw |
| State Reference | TX |
| Altitude | msl bound lower : 3000 msl bound upper : 4000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : dfw tower : hou |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | descent : approach descent other |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | descent : approach |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 6350 flight time type : 3300 |
| ASRS Report | 121368 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 240 flight time total : 5000 flight time type : 2000 |
| ASRS Report | 120681 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | other |
Narrative:
We were air carrier flight xx from sjt to dfw. The approach controller was also talking to air carrier B xy. We were at 4000'. He told us to descend to 3000' and reduce speed to 170 KTS. We started down and then he said that the clearance was for xy which I think was about 4 mi west of us at about 8000'. I don't think there was a conflict. He accused us of taking the xy clearance, but we read the clearance back. I believe the controller got the two call signs air carrier xx and air carrier B xy mixed up. Supplemental information from acn 120681: at approximately 3300' approach called and said we were assigned 4000' but to remain at 3000'. We told the controller that we had read back 3000' and 190 KTS flight xx. This received no response.
Original NASA ASRS Text
Title: REPORTER FLT ACKNOWLEDGED DESCENT CLRNC AND BEGAN DESCENT. ATC ADVISED CLRNC WAS FOR ANOTHER ACFT WITH SIMILAR CALL SIGN BUT ATC HAD NOT ACKNOWLEDGED READBACK.
Narrative: WE WERE ACR FLT XX FROM SJT TO DFW. THE APCH CTLR WAS ALSO TALKING TO ACR B XY. WE WERE AT 4000'. HE TOLD US TO DSND TO 3000' AND REDUCE SPEED TO 170 KTS. WE STARTED DOWN AND THEN HE SAID THAT THE CLRNC WAS FOR XY WHICH I THINK WAS ABOUT 4 MI W OF US AT ABOUT 8000'. I DON'T THINK THERE WAS A CONFLICT. HE ACCUSED US OF TAKING THE XY CLRNC, BUT WE READ THE CLRNC BACK. I BELIEVE THE CTLR GOT THE TWO CALL SIGNS ACR XX AND ACR B XY MIXED UP. SUPPLEMENTAL INFORMATION FROM ACN 120681: AT APPROX 3300' APCH CALLED AND SAID WE WERE ASSIGNED 4000' BUT TO REMAIN AT 3000'. WE TOLD THE CTLR THAT WE HAD READ BACK 3000' AND 190 KTS FLT XX. THIS RECEIVED NO RESPONSE.
Data retrieved from NASA's ASRS site as of August 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.