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E135 flight crew respond to a descent clearance they thought was theirs. ZDC controller working split frequencys and caught wrong aircraft descent shortly thereafter.
| Attributes | |
| ACN | 512982 |
| Time | |
| Date | 200105 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dca.airport |
| State Reference | DC |
| Altitude | msl bound lower : 16500 msl bound upper : 17000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc tower : jfk.tower |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 135 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : vacating altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 10500 flight time type : 100 |
| ASRS Report | 512982 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued advisory flight crew : returned to assigned airspace |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were level at 17000 ft when I thought I heard controller clear us down to 15000 ft. I didn't hear anyone else reply, so I stated 'air carrier xyz, down to 15000 ft.' there was no answer and I stared down. Out of 16500 ft, the controller informed us to climb back to 17000 ft. He was working an air carrier xya on a different frequency. That's why I didn't hear a reply. I'll get a definite confirmation next time. Controller was not upset and no conflict occurred.
Original NASA ASRS Text
Title: E135 FLC RESPOND TO A DSCNT CLRNC THEY THOUGHT WAS THEIRS. ZDC CTLR WORKING SPLIT FREQS AND CAUGHT WRONG ACFT DSCNT SHORTLY THEREAFTER.
Narrative: WE WERE LEVEL AT 17000 FT WHEN I THOUGHT I HEARD CTLR CLR US DOWN TO 15000 FT. I DIDN'T HEAR ANYONE ELSE REPLY, SO I STATED 'ACR XYZ, DOWN TO 15000 FT.' THERE WAS NO ANSWER AND I STARED DOWN. OUT OF 16500 FT, THE CTLR INFORMED US TO CLB BACK TO 17000 FT. HE WAS WORKING AN ACR XYA ON A DIFFERENT FREQ. THAT'S WHY I DIDN'T HEAR A REPLY. I'LL GET A DEFINITE CONFIRMATION NEXT TIME. CTLR WAS NOT UPSET AND NO CONFLICT OCCURRED.
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.