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ZDC controller misjudges flight actions of military aircraft in block altitude refueling and conflicting en route air carrier. Air carrier initiates evasive maneuver to avoid conflict. Controller expected separation and had not confirmed when refueler would turn.
| Attributes | |
| ACN | 428703 |
| Time | |
| Date | 199902 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : ilm.vortac |
| State Reference | NC |
| Altitude | msl bound lower : 25000 msl bound upper : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc.artcc |
| Operator | other |
| Make Model Name | Military |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level cruise other |
| 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 |
| Navigation In Use | other vortac |
| Flight Phase | cruise : level |
| Route In Use | enroute : atlantic enroute airway : ar1.airway |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 16 |
| ASRS Report | 428703 |
| Person 2 | |
| Affiliation | government : military |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : military pilot : instrument |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : took precautionary avoidance action |
| Miss Distance | horizontal : 18000 vertical : 0 |
| Supplementary | |
| Problem Areas | ATC Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Aircraft refueling were to turn right at ilm VORTAC and return to panal intersection. Air carrier Y was going diw.AR1.metta intersection. I believed this aircraft Y would be out in front of the refuelers. I noticed the data block north of ilm and figured the refuelers hadn't started their turn yet.
Original NASA ASRS Text
Title: ZDC CTLR MISJUDGES FLT ACTIONS OF MIL ACFT IN BLOCK ALT REFUELING AND CONFLICTING ENRTE ACR. ACR INITIATES EVASIVE MANEUVER TO AVOID CONFLICT. CTLR EXPECTED SEPARATION AND HAD NOT CONFIRMED WHEN REFUELER WOULD TURN.
Narrative: ACFT REFUELING WERE TO TURN R AT ILM VORTAC AND RETURN TO PANAL INTXN. ACR Y WAS GOING DIW.AR1.METTA INTXN. I BELIEVED THIS ACFT Y WOULD BE OUT IN FRONT OF THE REFUELERS. I NOTICED THE DATA BLOCK N OF ILM AND FIGURED THE REFUELERS HADN'T STARTED THEIR TURN YET.
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.