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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Captain of an large transport declared his emergency authority/authorized after turning off assigned to avoid WX.
| Attributes | |
| ACN | 445448 |
| Time | |
| Date | 199908 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : als.vor |
| State Reference | CO |
| Altitude | msl single value : 37000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Thunderstorm |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdv.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : flight engineer pilot : atp pilot : cfi |
| Experience | flight time last 90 days : 200 flight time total : 14000 flight time type : 1800 |
| ASRS Report | 445448 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial pilot : multi engine |
| Events | |
| Anomaly | inflight encounter : turbulence inflight encounter : weather non adherence : clearance other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : weather radar other flight crewa |
| Resolutory Action | controller : separated traffic flight crew : declared emergency flight crew : took precautionary avoidance action |
| Supplementary | |
| Problem Areas | Weather Flight Crew Human Performance |
| Primary Problem | Weather |
Narrative:
During cruise we received the ok to deviate to the south of thunderstorms along our route of flight. As we proceeded to deviate to the south, the hole we had been heading toward suddenly closed. To avoid certain severe turbulence associated with the line of thunderstorms, it became clear that a north deviation would be necessary. The controller was unable to provide clearance to the north. We began a turn to the north using our emergency authority/authorized. The controller was able to get another aircraft to turn so as to avoid a conflict just as we were establishing a turn to the north. In retrospect, I can't think of how I could have performed better in view of how fast the thunderstorms were growing along our proposed route.
Original NASA ASRS Text
Title: CAPT OF AN LGT DECLARED HIS EMER AUTH AFTER TURNING OFF ASSIGNED TO AVOID WX.
Narrative: DURING CRUISE WE RECEIVED THE OK TO DEVIATE TO THE S OF TSTMS ALONG OUR RTE OF FLT. AS WE PROCEEDED TO DEVIATE TO THE S, THE HOLE WE HAD BEEN HEADING TOWARD SUDDENLY CLOSED. TO AVOID CERTAIN SEVERE TURB ASSOCIATED WITH THE LINE OF TSTMS, IT BECAME CLR THAT A N DEV WOULD BE NECESSARY. THE CTLR WAS UNABLE TO PROVIDE CLRNC TO THE N. WE BEGAN A TURN TO THE N USING OUR EMER AUTH. THE CTLR WAS ABLE TO GET ANOTHER ACFT TO TURN SO AS TO AVOID A CONFLICT JUST AS WE WERE ESTABLISHING A TURN TO THE N. IN RETROSPECT, I CAN'T THINK OF HOW I COULD HAVE PERFORMED BETTER IN VIEW OF HOW FAST THE TSTMS WERE GROWING ALONG OUR PROPOSED RTE.
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.