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ARTCC radar controller report on loss of separation between 2 B757's. A mix of inadequate aircraft performance and an extended holding pattern northeast of ewc, PA.
| Attributes | |
| ACN | 485088 |
| Time | |
| Date | 200009 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : ewc.vortac |
| State Reference | PA |
| Altitude | msl single value : 35000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Turbulence Thunderstorm |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | cruise : holding |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zob.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : vacating altitude |
| Route In Use | enroute : on vectors enroute airway : j60.airway |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 13 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : traffic management |
| Qualification | controller : radar |
| Experience | controller limited radar : 1 controller military : 4 controller radar : 13 |
| ASRS Report | 485090 |
| Events | |
| Anomaly | airspace violation : exit conflict : airborne less severe inflight encounter : weather inflight encounter : turbulence non adherence : required legal separation non adherence : clearance non adherence : published procedure other anomaly other other spatial deviation |
| Independent Detector | atc equipment : conflict alert other controllera other controllerb |
| Resolutory Action | controller : issued alert controller : issued new clearance controller : separated traffic |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 25800 vertical : 0 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Airspace Structure Aircraft ATC Human Performance Weather |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Operational Deviation Operational Error Pilot Deviation |
Narrative:
Flight X was holding at FL350 at ewc east on J64 with 15 mi legs. Flight Y was sebound to miss the hpas (holding pattern area). Flight X went too far north and east of the ewc VORTAC, and got together with flight Y. Flight X then did not read back a turn to 180 degrees (a 90 degree turn). Had to reissue the clearance. Flight Y was turned 30 degrees left only after missing wbound traffic on J60 at FL330. FL330 and FL370 were occupied and unavailable. Flight X was well beyond a 15 mi holding leg. Supplemental information from acn 485090: holding aircraft, and aircraft Y climb rate not good, need to have published holding pattern at ewc, or someplace close by. Doing d-side functions, posting strips, strip marking, etc, heard r-side give evasive vectors to aircraft and looked at radar scope, conflict alert was going off. R-side did give corrective vectors.
Original NASA ASRS Text
Title: ARTCC RADAR CTLR RPT ON LOSS OF SEPARATION BTWN 2 B757'S. A MIX OF INADEQUATE ACFT PERFORMANCE AND AN EXTENDED HOLDING PATTERN NE OF EWC, PA.
Narrative: FLT X WAS HOLDING AT FL350 AT EWC E ON J64 WITH 15 MI LEGS. FLT Y WAS SEBOUND TO MISS THE HPAS (HOLDING PATTERN AREA). FLT X WENT TOO FAR N AND E OF THE EWC VORTAC, AND GOT TOGETHER WITH FLT Y. FLT X THEN DID NOT READ BACK A TURN TO 180 DEGS (A 90 DEG TURN). HAD TO REISSUE THE CLRNC. FLT Y WAS TURNED 30 DEGS L ONLY AFTER MISSING WBOUND TFC ON J60 AT FL330. FL330 AND FL370 WERE OCCUPIED AND UNAVAILABLE. FLT X WAS WELL BEYOND A 15 MI HOLDING LEG. SUPPLEMENTAL INFO FROM ACN 485090: HOLDING ACFT, AND ACFT Y CLB RATE NOT GOOD, NEED TO HAVE PUBLISHED HOLDING PATTERN AT EWC, OR SOMEPLACE CLOSE BY. DOING D-SIDE FUNCTIONS, POSTING STRIPS, STRIP MARKING, ETC, HEARD R-SIDE GIVE EVASIVE VECTORS TO ACFT AND LOOKED AT RADAR SCOPE, CONFLICT ALERT WAS GOING OFF. R-SIDE DID GIVE CORRECTIVE VECTORS.
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.