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Potential conflict ensues as air carrier light transport PIC does not accept ATC direction on vector due to WX avoidance considerations.
| Attributes | |
| ACN | 147792 |
| Time | |
| Date | 199005 |
| Day | Sun |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : mrb |
| State Reference | WV |
| Altitude | msl bound lower : 9000 msl bound upper : 9000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : iad |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | cruise other cruise other |
| Route In Use | arrival other enroute : on vectors enroute airway : iad |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | cruise other cruise other descent other |
| Route In Use | arrival other enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 225 flight time total : 2900 flight time type : 725 |
| ASRS Report | 147792 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe inflight encounter : weather non adherence : clearance non adherence : required legal separation other anomaly other other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : exited adverse environment flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 5000 vertical : 0 |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | Operational Error Pilot Deviation other |
Narrative:
Approximately 6-7 mi from robert intersection, ATC advised us to 'turn right heading 270 degree'. Reply was 'unable right turn due to WX'. Frequency was very busy and no reply was heard to our transmission. We were IMC in and out of clouds at 9000'. At this time, ATC cleared an air carrier widebody transport to descend to 8000'. Several mins later we saw the aircraft at 12 O'clock and about 1 mi descending ahead of us. Upon reaching robert intersection, I asked ATC for a heading. The controller became very excited and said our heading was supposed to be 270 degrees. I informed him again we were unable to turn right due to WX. At this time she issued a traffic alert for traffic 12 O'clock and less than 1 mi. Also indicated a right turn to 310 degrees was necessary. Due to controller obviously excited xmissions we turned right to new heading even though radar showed an active level 3 cell. After 1-2 mins in moderate turbulence and heavy rain, controller directed left turn to intercept the localizer. Once again we were unable to due to WX. After short discussion new instructions were to turn right approximately 300 degrees to a heading to intercept. Controller apologized for mishearing our initial reply.
Original NASA ASRS Text
Title: POTENTIAL CONFLICT ENSUES AS ACR LTT PIC DOES NOT ACCEPT ATC DIRECTION ON VECTOR DUE TO WX AVOIDANCE CONSIDERATIONS.
Narrative: APPROX 6-7 MI FROM ROBERT INTXN, ATC ADVISED US TO 'TURN R HDG 270 DEG'. REPLY WAS 'UNABLE R TURN DUE TO WX'. FREQ WAS VERY BUSY AND NO REPLY WAS HEARD TO OUR XMISSION. WE WERE IMC IN AND OUT OF CLOUDS AT 9000'. AT THIS TIME, ATC CLRED AN ACR WDB TO DSND TO 8000'. SEVERAL MINS LATER WE SAW THE ACFT AT 12 O'CLOCK AND ABOUT 1 MI DSNDING AHEAD OF US. UPON REACHING ROBERT INTXN, I ASKED ATC FOR A HDG. THE CTLR BECAME VERY EXCITED AND SAID OUR HDG WAS SUPPOSED TO BE 270 DEGS. I INFORMED HIM AGAIN WE WERE UNABLE TO TURN R DUE TO WX. AT THIS TIME SHE ISSUED A TFC ALERT FOR TFC 12 O'CLOCK AND LESS THAN 1 MI. ALSO INDICATED A R TURN TO 310 DEGS WAS NECESSARY. DUE TO CTLR OBVIOUSLY EXCITED XMISSIONS WE TURNED R TO NEW HDG EVEN THOUGH RADAR SHOWED AN ACTIVE LEVEL 3 CELL. AFTER 1-2 MINS IN MODERATE TURB AND HEAVY RAIN, CTLR DIRECTED L TURN TO INTERCEPT THE LOC. ONCE AGAIN WE WERE UNABLE TO DUE TO WX. AFTER SHORT DISCUSSION NEW INSTRUCTIONS WERE TO TURN R APPROX 300 DEGS TO A HDG TO INTERCEPT. CTLR APOLOGIZED FOR MISHEARING OUR INITIAL REPLY.
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.