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An air carrier MD11 declared an emergency and deviated around thunderstorm activity when ARTCC denied permission.
| Attributes | |
| ACN | 346155 |
| Time | |
| Date | 199608 |
| Day | Sat |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | atc facility : nud |
| State Reference | AK |
| Altitude | msl bound lower : 31000 msl bound upper : 31000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa |
| Operator | common carrier : air carrier |
| Make Model Name | MD-11 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other cruise other other |
| Route In Use | enroute : other oceanic enroute : pacific enroute airway : zoa |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 346155 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 346154 |
| Events | |
| Anomaly | inflight encounter : weather non adherence : clearance other anomaly other other spatial deviation |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : took evasive action other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | other |
Narrative:
At FL310 at approximately 150 mi west of 48n180e on track 1 there was a solid line of thunderstorms approximately 100 mi wide with the worst of the activity north of the track. Requested a 40 to 45 mi deviation so of track and a higher altitude from ATC through hnl commercial radio. Both requests were denied. The only possible solution to continue safely was to deviate south of track. Therefore, in accordance with far 121.557, we declared an emergency at approximately XA25Z to deviate south of course by 40-45 mi to avoid flying through the active line of thunderstorms on our track. The WX was forecast to be near our route with tops between FL360 and FL390. Deviation back to course was accomplished about 40 mi west of 48n180e.
Original NASA ASRS Text
Title: AN ACR MD11 DECLARED AN EMER AND DEVIATED AROUND TSTM ACTIVITY WHEN ARTCC DENIED PERMISSION.
Narrative: AT FL310 AT APPROX 150 MI W OF 48N180E ON TRACK 1 THERE WAS A SOLID LINE OF TSTMS APPROX 100 MI WIDE WITH THE WORST OF THE ACTIVITY N OF THE TRACK. REQUESTED A 40 TO 45 MI DEV SO OF TRACK AND A HIGHER ALT FROM ATC THROUGH HNL COMMERCIAL RADIO. BOTH REQUESTS WERE DENIED. THE ONLY POSSIBLE SOLUTION TO CONTINUE SAFELY WAS TO DEVIATE S OF TRACK. THEREFORE, IN ACCORDANCE WITH FAR 121.557, WE DECLARED AN EMER AT APPROX XA25Z TO DEVIATE S OF COURSE BY 40-45 MI TO AVOID FLYING THROUGH THE ACTIVE LINE OF TSTMS ON OUR TRACK. THE WX WAS FORECAST TO BE NEAR OUR RTE WITH TOPS BTWN FL360 AND FL390. DEV BACK TO COURSE WAS ACCOMPLISHED ABOUT 40 MI W OF 48N180E.
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.