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Medium large transport aircraft on STAR was cleared to turn at the end of the arrival procedure, but due to WX, a large cumulo nimbus, flight crew deviated 2 mi around WX.
| Attributes | |
| ACN | 375240 |
| Time | |
| Date | 199707 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sat |
| State Reference | TX |
| Altitude | msl bound lower : 12000 msl bound upper : 12000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | descent other |
| Route In Use | arrival other arrival star : star enroute airway : sat |
| Flight Plan | IFR |
| Person 1 | |
| 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 : 5000 flight time type : 600 |
| ASRS Report | 375240 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | inflight encounter : weather non adherence : published procedure non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | other |
Narrative:
Prior to marcs we were told to fly heading 290 degrees at end of arrival procedure. At marcs we did not make the left turn exactly as depicted because there was a large cloud on centerline. We deviated slightly west of course (perhaps 2 mi). We were unable to tell controller because of radio chatter. He gave us a heading and thought we had mistakenly already turned 290 degrees. By that time we could and did turn to his heading of 210 degrees for traffic. We were around the build-up and starting our turn when he called. I do not think any loss of separation occurred.
Original NASA ASRS Text
Title: MLG ACFT ON STAR WAS CLRED TO TURN AT THE END OF THE ARR PROC, BUT DUE TO WX, A LARGE CUMULO NIMBUS, FLC DEVIATED 2 MI AROUND WX.
Narrative: PRIOR TO MARCS WE WERE TOLD TO FLY HDG 290 DEGS AT END OF ARR PROC. AT MARCS WE DID NOT MAKE THE L TURN EXACTLY AS DEPICTED BECAUSE THERE WAS A LARGE CLOUD ON CTRLINE. WE DEVIATED SLIGHTLY W OF COURSE (PERHAPS 2 MI). WE WERE UNABLE TO TELL CTLR BECAUSE OF RADIO CHATTER. HE GAVE US A HEADING AND THOUGHT WE HAD MISTAKENLY ALREADY TURNED 290 DEGS. BY THAT TIME WE COULD AND DID TURN TO HIS HDG OF 210 DEGS FOR TFC. WE WERE AROUND THE BUILD-UP AND STARTING OUR TURN WHEN HE CALLED. I DO NOT THINK ANY LOSS OF SEPARATION OCCURRED.
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.