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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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SF34 flight crew loses control of aircraft at 11000 ft MSL due to rapid accumulation of airframe ice. Able to recover at lower altitudes.
| Attributes | |
| ACN | 683042 |
| Time | |
| Date | 200601 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zla.artcc |
| State Reference | CA |
| Altitude | msl bound lower : 6500 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Ice |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zla.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | SF 340B |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 683042 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| ASRS Report | 683039 |
| Events | |
| Anomaly | inflight encounter other other anomaly |
| Independent Detector | aircraft equipment : gpws other flight crewa |
| Resolutory Action | flight crew : regained aircraft control flight crew : exited adverse environment |
| Supplementary | |
| Problem Areas | Aircraft Flight Crew Human Performance Weather |
| Primary Problem | Weather |
Narrative:
While climbing through about 11000 ft; we encountered light rime ice. While activating the appropriate anti-ice and de-ice system; it immediately and suddenly became a severe icing situation. The aircraft banked steeply to the left and began to descend rapidly. I assumed control of the aircraft and advised the first officer. We were able to attain full control at about 7000 ft. After contacting ATC; we leveled off at about 6500 ft; requested new vectors; and proceeded to lax uneventfully.
Original NASA ASRS Text
Title: SF34 FLT CREW LOSES CTL OF ACFT AT 11000 FT MSL DUE TO RAPID ACCUMULATION OF AIRFRAME ICE. ABLE TO RECOVER AT LOWER ALTS.
Narrative: WHILE CLBING THROUGH ABOUT 11000 FT; WE ENCOUNTERED LIGHT RIME ICE. WHILE ACTIVATING THE APPROPRIATE ANTI-ICE AND DE-ICE SYS; IT IMMEDIATELY AND SUDDENLY BECAME A SEVERE ICING SITUATION. THE ACFT BANKED STEEPLY TO THE L AND BEGAN TO DSND RAPIDLY. I ASSUMED CTL OF THE ACFT AND ADVISED THE FO. WE WERE ABLE TO ATTAIN FULL CTL AT ABOUT 7000 FT. AFTER CONTACTING ATC; WE LEVELED OFF AT ABOUT 6500 FT; REQUESTED NEW VECTORS; AND PROCEEDED TO LAX UNEVENTFULLY.
Data retrieved from NASA's ASRS site as of January 2009 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.