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Reporter requested controller #2 to stop aircraft X at an altitude below overflt aircraft Y. This was not done, loss of separation resulted in operational error.
| Attributes | |
| ACN | 441179 |
| Time | |
| Date | 199906 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : ldn.vortac |
| State Reference | VA |
| Altitude | msl single value : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Make Model Name | Commercial Fixed Wing |
| Flight Phase | cruise : enroute altitude change |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zdc.artcc |
| Make Model Name | Commercial Fixed Wing |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 441179 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Events | |
| Anomaly | non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : took evasive action |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 24000 vertical : 1500 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Intra Facility Coordination Failure |
Narrative:
I issued a control instruction to another controller to stop aircraft X at FL330 for traffic at FL350. I received the handoff on aircraft X and the data block reflected FL330. I was distraction when aircraft X checked on my frequency by the supervisor talking to me about in trail spacing and did not hear aircraft X say that his assigned altitude was FL350. The xferring controller had never issued aircraft X FL330 and standard separation was lost.
Original NASA ASRS Text
Title: RPTR REQUESTED CTLR #2 TO STOP ACFT X AT AN ALT BELOW OVERFLT ACFT Y. THIS WAS NOT DONE, LOSS OF SEPARATION RESULTED IN OPERROR.
Narrative: I ISSUED A CTL INSTRUCTION TO ANOTHER CTLR TO STOP ACFT X AT FL330 FOR TFC AT FL350. I RECEIVED THE HDOF ON ACFT X AND THE DATA BLOCK REFLECTED FL330. I WAS DISTR WHEN ACFT X CHKED ON MY FREQ BY THE SUPVR TALKING TO ME ABOUT IN TRAIL SPACING AND DID NOT HEAR ACFT X SAY THAT HIS ASSIGNED ALT WAS FL350. THE XFERRING CTLR HAD NEVER ISSUED ACFT X FL330 AND STANDARD SEPARATION WAS LOST.
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.