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Non adherence to ATC clearance instruction during a heading track deviation in proximity of thunderstorm activity.
| Attributes | |
| ACN | 315409 |
| Time | |
| Date | 199509 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : mdw |
| State Reference | IL |
| Altitude | msl bound lower : 3000 msl bound upper : 6000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 7000 flight time type : 400 |
| ASRS Report | 315409 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 11000 flight time type : 800 |
| ASRS Report | 315402 |
| Events | |
| Anomaly | inflight encounter : weather non adherence : clearance non adherence other other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : exited adverse environment flight crew : declared emergency none taken : anomaly accepted |
| Consequence | faa : reviewed incident with flight crew |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
Departed mdw on mdw 4 departure, assigned heading 220 degrees at 3000 ft by tower with thunderstorms approaching. Departure control was contacted while we were at 220 degree heading at 3000 ft. Advised ATC of necessary heading changes required to avoid thunderstorms. A heading of 180 degrees was assigned and a climb to 6000 ft. Advised ATC we could only hold 180 degree heading for 8 NM. Then requested a 140 degree heading to avoid thunderstorms on 2 occasions without response from ATC, then proceeded to turn to avoid thunderstorms. Upon clearing thunderstorms we flew 180 degree heading assigned by ATC. Clear of WX and at that time ATC advised us to contact ord TRACON when able.
Original NASA ASRS Text
Title: NON ADHERENCE TO ATC CLRNC INSTRUCTION DURING A HDG TRACK DEV IN PROX OF TSTM ACTIVITY.
Narrative: DEPARTED MDW ON MDW 4 DEP, ASSIGNED HDG 220 DEGS AT 3000 FT BY TWR WITH TSTMS APCHING. DEP CTL WAS CONTACTED WHILE WE WERE AT 220 DEG HDG AT 3000 FT. ADVISED ATC OF NECESSARY HDG CHANGES REQUIRED TO AVOID TSTMS. A HDG OF 180 DEGS WAS ASSIGNED AND A CLB TO 6000 FT. ADVISED ATC WE COULD ONLY HOLD 180 DEG HDG FOR 8 NM. THEN REQUESTED A 140 DEG HDG TO AVOID TSTMS ON 2 OCCASIONS WITHOUT RESPONSE FROM ATC, THEN PROCEEDED TO TURN TO AVOID TSTMS. UPON CLRING TSTMS WE FLEW 180 DEG HDG ASSIGNED BY ATC. CLR OF WX AND AT THAT TIME ATC ADVISED US TO CONTACT ORD TRACON WHEN ABLE.
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.