An air carrier dispatcher and captain describe the events surrounding a diversion due to left engine...

Attributes
ACN	989781
Time
Date	201201
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	IMC
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Component
Aircraft Component	Intake Ice System
Person 1
Function	Dispatcher
Person 2
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 18000 Flight Crew Type 1000
Events
Anomaly	Aircraft Equipment Problem Critical Inflight Event / Encounter Fuel Issue Inflight Event / Encounter Weather / Turbulence

Narrative:

Upon entering holding at FL180 the left engine anti ice EICAS status message illuminated; in addition to the anti ice status message. As a result of the status messages; flight into icing conditions was to be avoided. At the time; the aircraft was holding right above the cloud layer; but our airport was in the midst of a snowstorm and was reporting 3/4 -sn. The filed alternate; was also reporting sn and icing conditions were expected below FL180. The crew initiated a satcom phone call to dispatch to review options. Shortly thereafter; maintenance control was added to the patch. After quickly ascertaining there was no in flight option to address the anti ice issues and a quick review of available diversion stations; it was determined that the closest option available that was free of icing conditions. Due to the fuel state of the aircraft; both the captain and dispatch concurred that a declaration of an emergency and an immediate diversion was required.

Original NASA ASRS Text

Title: An Air Carrier Dispatcher and Captain describe the events surrounding a diversion due to left engine anti-ice failure with heavy snow falling at the destination airport.

Narrative: Upon entering holding at FL180 the L ENG ANTI ICE EICAS status message illuminated; in addition to the ANTI ICE status message. As a result of the status messages; flight into icing conditions was to be avoided. At the time; the aircraft was holding right above the cloud layer; but our airport was in the midst of a snowstorm and was reporting 3/4 -SN. The filed alternate; was also reporting SN and icing conditions were expected below FL180. The crew initiated a SATCOM phone call to Dispatch to review options. Shortly thereafter; Maintenance Control was added to the patch. After quickly ascertaining there was no in flight option to address the ANTI ICE issues and a quick review of available diversion stations; it was determined that the closest option available that was free of icing conditions. Due to the fuel state of the aircraft; both the Captain and Dispatch concurred that a declaration of an emergency and an immediate diversion was required.

Data retrieved from NASA's ASRS site as of July 2013 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.

An air carrier dispatcher and captain describe the events surrounding a diversion due to left engine anti-ice failure with heavy snow falling at the destination airport.