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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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An EMB120 descended out of icing conditions, apparently without ATC clearance. Emergency decision, apparently without declaring an emergency. WX factors icing in clouds that may have affected elevator control.
| Attributes | |
| ACN | 345751 |
| Time | |
| Date | 199608 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sjt |
| State Reference | TX |
| Altitude | msl bound lower : 19000 msl bound upper : 19000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zfw |
| Operator | common carrier : air carrier |
| Make Model Name | Brasilia EMB-120 All Series |
| Operating Under FAR Part | Part 135 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other descent other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 9000 flight time type : 4500 |
| ASRS Report | 345751 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : far |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency flight crew : exited adverse environment flight crew : took evasive action |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Weather |
| Air Traffic Incident | Pilot Deviation |
Narrative:
While climbing through FL190 (temperature plus 1 degree C) and entering an area that appeared as light precipitation on radar, we experienced moderate to severe mixed icing and freezing rain. The first officer, who was flying, turned off the autoplt and we immediately descended to a warmer altitude and reported the icing to ATC. The first officer indicated that control of the aircraft was not as positive as it should have been and that there was an excessive amount of play in the elevator. It did not appear that any ice had built on the wing beyond the boots. At 17000 ft we encountered clearing and warming conditions and no other problem was encountered.
Original NASA ASRS Text
Title: AN EMB120 DSNDED OUT OF ICING CONDITIONS, APPARENTLY WITHOUT ATC CLRNC. EMER DECISION, APPARENTLY WITHOUT DECLARING AN EMER. WX FACTORS ICING IN CLOUDS THAT MAY HAVE AFFECTED ELEVATOR CTL.
Narrative: WHILE CLBING THROUGH FL190 (TEMP PLUS 1 DEG C) AND ENTERING AN AREA THAT APPEARED AS LIGHT PRECIPITATION ON RADAR, WE EXPERIENCED MODERATE TO SEVERE MIXED ICING AND FREEZING RAIN. THE FO, WHO WAS FLYING, TURNED OFF THE AUTOPLT AND WE IMMEDIATELY DSNDED TO A WARMER ALT AND RPTED THE ICING TO ATC. THE FO INDICATED THAT CTL OF THE ACFT WAS NOT AS POSITIVE AS IT SHOULD HAVE BEEN AND THAT THERE WAS AN EXCESSIVE AMOUNT OF PLAY IN THE ELEVATOR. IT DID NOT APPEAR THAT ANY ICE HAD BUILT ON THE WING BEYOND THE BOOTS. AT 17000 FT WE ENCOUNTERED CLRING AND WARMING CONDITIONS AND NO OTHER PROB WAS ENCOUNTERED.
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.