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Air carrier turbojet acknowledges climb clearance intended for another aircraft on the bwi swann SID, requiring controller descent clearance and vector to both aircraft to ensure separation.
| Attributes | |
| ACN | 506880 |
| Time | |
| Date | 200104 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : bwi.airport |
| State Reference | MD |
| Altitude | msl bound lower : 10000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mcc.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure sid : swann 3 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 85 flight time total : 16000 flight time type : 72 |
| ASRS Report | 506880 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance |
| Resolutory Action | controller : separated traffic controller : issued new clearance controller : issued advisory flight crew : returned to assigned airspace |
| Miss Distance | horizontal : 24000 vertical : 0 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On the climb out of bwi, we heard and read back a climb clearance to 15000 ft. As we passed through 11000 ft, departure called and questioned our altitude saying we had been cleared to 10000 ft. Traffic was called at 2 O'clock and at 5 mi. Turns were issued to both aircraft, and we descended to 10000 ft. After separation was achieved, course was resumed. No TCASII alerts during event. If we misheard the clearance, ATC misheard or did not listen to the readback and therefore, we assumed our understanding of the clearance was correct. We all need to listen carefully to what is said to insure understanding.
Original NASA ASRS Text
Title: ACR TURBOJET ACKNOWLEDGES CLB CLRNC INTENDED FOR ANOTHER ACFT ON THE BWI SWANN SID, REQUIRING CTLR DSCNT CLRNC AND VECTOR TO BOTH ACFT TO ENSURE SEPARATION.
Narrative: ON THE CLB OUT OF BWI, WE HEARD AND READ BACK A CLB CLRNC TO 15000 FT. AS WE PASSED THROUGH 11000 FT, DEP CALLED AND QUESTIONED OUR ALT SAYING WE HAD BEEN CLRED TO 10000 FT. TFC WAS CALLED AT 2 O'CLOCK AND AT 5 MI. TURNS WERE ISSUED TO BOTH ACFT, AND WE DSNDED TO 10000 FT. AFTER SEPARATION WAS ACHIEVED, COURSE WAS RESUMED. NO TCASII ALERTS DURING EVENT. IF WE MISHEARD THE CLRNC, ATC MISHEARD OR DID NOT LISTEN TO THE READBACK AND THEREFORE, WE ASSUMED OUR UNDERSTANDING OF THE CLRNC WAS CORRECT. WE ALL NEED TO LISTEN CAREFULLY TO WHAT IS SAID TO INSURE UNDERSTANDING.
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.