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ZDC controller misses descent clearance readback from an JS41, which conflicts with an SH33.
| Attributes | |
| ACN | 510395 |
| Time | |
| Date | 200105 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : esl.vortac |
| State Reference | WV |
| Altitude | msl bound lower : 12000 msl bound upper : 13000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Jetstream 41 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | other |
| Make Model Name | Shorts SD-330-200/Utt/Sherpa |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller military : 3 controller non radar : 3 controller radar : 10 |
| ASRS Report | 510395 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : clearance non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert other other : conflict alert |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 24126 vertical : 0 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance ATC Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Aircraft #1 was issued a descent clearance from 17000 ft MSL to 11000 ft. Aircraft #2, level at 11000 ft, requested climb to 12000 ft. Aircraft #1 was issued an amended altitude assignment of 13000 ft and aircraft #2 was granted climb to 12000 ft MSL. While aircraft were approximately 8 NM apart (on opposite courses) traffic was issued. Aircraft #1 continued through assigned altitude resulting in a loss of standard separation. I feel that this oversight by the pilot may have been caught if I had reiterated the altitude assignment to the descending aircraft as part of the traffic call. While this is not procedure, it would be a good safety back-up to intervene in overshoots of altitude assignment.
Original NASA ASRS Text
Title: ZDC CTLR MISSES DSCNT CLRNC READBACK FROM AN JS41, WHICH CONFLICTS WITH AN SH33.
Narrative: ACFT #1 WAS ISSUED A DSCNT CLRNC FROM 17000 FT MSL TO 11000 FT. ACFT #2, LEVEL AT 11000 FT, REQUESTED CLB TO 12000 FT. ACFT #1 WAS ISSUED AN AMENDED ALT ASSIGNMENT OF 13000 FT AND ACFT #2 WAS GRANTED CLB TO 12000 FT MSL. WHILE ACFT WERE APPROX 8 NM APART (ON OPPOSITE COURSES) TFC WAS ISSUED. ACFT #1 CONTINUED THROUGH ASSIGNED ALT RESULTING IN A LOSS OF STANDARD SEPARATION. I FEEL THAT THIS OVERSIGHT BY THE PLT MAY HAVE BEEN CAUGHT IF I HAD REITERATED THE ALT ASSIGNMENT TO THE DSNDING ACFT AS PART OF THE TFC CALL. WHILE THIS IS NOT PROC, IT WOULD BE A GOOD SAFETY BACK-UP TO INTERVENE IN OVERSHOOTS OF ALT ASSIGNMENT.
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.