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B757 first officer slowed aircraft and climbed at a steep angle to avoid entering clouds without notifying ARTCC controller.
| Attributes | |
| ACN | 500970 |
| Time | |
| Date | 200102 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : slc.airport |
| State Reference | UT |
| Altitude | msl single value : 25000 |
| Environment | |
| Flight Conditions | VMC |
| Weather Elements | Turbulence |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zlc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B767 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : vacating altitude |
| Route In Use | departure : other published ifr departure |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zlc.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | climbout : vacating altitude |
| Route In Use | departure : other published ifr departure |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 220 flight time total : 10000 flight time type : 1500 |
| ASRS Report | 500970 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : commercial pilot : instrument pilot : multi engine |
| Events | |
| Anomaly | non adherence : clearance other anomaly |
| Independent Detector | other flight crewa |
| Resolutory Action | other |
| Consequence | other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
Narrative:
While descending out of salt lake, we encountered light turbulence. I decided to 'zoom' the aircraft up to clear a cloud deck above and ahead of us. I told the captain I was going to slow to 250 KTS and use maximum climb power. We did not inform ATC that we were going to slow. A few mins after we started our attempt to clear the cloud deck, an aircraft behind us remarked about severe turbulence. It would have been our wake that caused this turbulence. We accelerated to normal climb. After landing, we called our company to see if any problems were reported to operations center since we believed that aircraft behind us on the climb was a company aircraft. None were reported. It is mandatory to report a large change of airspeed to ATC to avoid this situation. I will do so in the future.
Original NASA ASRS Text
Title: B757 FO SLOWED ACFT AND CLBED AT A STEEP ANGLE TO AVOID ENTERING CLOUDS WITHOUT NOTIFYING ARTCC CTLR.
Narrative: WHILE DSNDING OUT OF SALT LAKE, WE ENCOUNTERED LIGHT TURB. I DECIDED TO 'ZOOM' THE ACFT UP TO CLR A CLOUD DECK ABOVE AND AHEAD OF US. I TOLD THE CAPT I WAS GOING TO SLOW TO 250 KTS AND USE MAX CLB PWR. WE DID NOT INFORM ATC THAT WE WERE GOING TO SLOW. A FEW MINS AFTER WE STARTED OUR ATTEMPT TO CLR THE CLOUD DECK, AN ACFT BEHIND US REMARKED ABOUT SEVERE TURB. IT WOULD HAVE BEEN OUR WAKE THAT CAUSED THIS TURB. WE ACCELERATED TO NORMAL CLB. AFTER LNDG, WE CALLED OUR COMPANY TO SEE IF ANY PROBS WERE RPTED TO OPS CTR SINCE WE BELIEVED THAT ACFT BEHIND US ON THE CLB WAS A COMPANY ACFT. NONE WERE RPTED. IT IS MANDATORY TO RPT A LARGE CHANGE OF AIRSPD TO ATC TO AVOID THIS SIT. I WILL DO SO IN THE FUTURE.
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.