MD80 crew reported icing conditions; turbulence; engine surge and inability to maintain altitude at ...

Attributes
ACN	1452143
Time
Date	201705
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	IMC
Aircraft 1
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Cruise
Flight Plan	IFR
Component
Aircraft Component	Turbine Engine
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Ground Event / Encounter Loss Of Aircraft Control Inflight Event / Encounter Weather / Turbulence

Narrative:

Approaching a west/east line ATC advised a hole several aircraft had flown through as an easy way on filed route. From the south we were cleared deviations and when able direct a fix. At FL340 encountered icing conditions and engaged all anti icing and experienced speed decay at max cruise power. Switched to [different altitude]; no relief. Told first officer (first officer) to call for lower altitude; frequency was busy. Finally speed was below 250 and decaying; moderate to severe turbulence occurred and autopilot disconnected; right wing dropped 45 degrees as right engine surged from 1.4 to 2.4. Hand flew a descending recovery checking TCAS below and called mayday and cardinal altitudes on the way down until ATC contact established. Turned to berri fix and arrested descent at FL310; reported no injuries. Wrote up severe turbulence and engine surge parameters in [the log].lee side of storm downdraft exceeded performance of the airplane.use lower altitude and greater horizontal clearance.

Original NASA ASRS Text

Title: MD80 Crew reported icing conditions; turbulence; engine surge and inability to maintain altitude at FL340. Crew reported they arrested the descent at FL310.

Narrative: Approaching a West/East line ATC advised a hole several aircraft had flown through as an easy way on filed route. From the south we were cleared deviations and when able direct a fix. At FL340 encountered icing conditions and engaged all anti icing and experienced speed decay at max cruise power. Switched to [different altitude]; no relief. Told First Officer (FO) to call for lower altitude; frequency was busy. Finally speed was below 250 and decaying; moderate to severe turbulence occurred and autopilot disconnected; right wing dropped 45 degrees as right engine surged from 1.4 to 2.4. Hand flew a descending recovery checking TCAS below and called mayday and cardinal altitudes on the way down until ATC contact established. Turned to BERRI fix and arrested descent at FL310; reported no injuries. Wrote up severe turbulence and engine surge parameters in [the log].Lee side of storm downdraft exceeded performance of the airplane.Use lower altitude and greater horizontal clearance.

Data retrieved from NASA's ASRS site 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.

MD80 crew reported icing conditions; turbulence; engine surge and inability to maintain altitude at FL340. Crew reported they arrested the descent at FL310.