A CL65 EICAS alerted wing anti ice duct as the crew prepared for the arrival in IFR with icing. An e...

Attributes
ACN	982327
Time
Date	201112
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	Regional Jet CL65 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR ZZZ
Flight Plan	IFR
Component
Aircraft Component	Pneumatic Ducting
Person 1
Function	First Officer Pilot Flying
Qualification	Flight Crew Commercial
Experience	Flight Crew Last 90 Days 60 Flight Crew Total 2845 Flight Crew Type 1285
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 60 Flight Crew Total 9020 Flight Crew Type 5200
Events
Anomaly	Aircraft Equipment Problem Critical Inflight Event / Encounter Weather / Turbulence

Narrative:

This was our first flight of the day. I was flying. We were inbound on the arrival at 11;000 MSL. We were starting our descent when we received a wing anti ice duct warning message on EICAS for the left wing. I continued to fly the aircraft and took over control of communication 1. The captain ran the QRH for the warning message. After completion of the QRH procedures; captain informed approach and company of our situation. With the weather at the airport IFR (005 broken temp 1C; visibility 1.5 SM; wind 260/06 KTS with light snow falling and mist); it was not going to be possible for us to continue to land at our filed destination with the wing anti ice inoperative. In addition; we were in and out of icing conditions (light rime) at the time of the occurrence. We were given vectors and a descent to 5;000 by approach. We declared an emergency and requested to divert back to our departure airport. ATC gave us vectors and a clearance direct. Due to the cold temperatures at our altitude we requested descent to 3;000 and also requested to fly faster to help increase the tat to reduce the possibility of ice development on wing. ATC granted us 'speed at our discretion' (due to declared emergency). We flew at approximately 320 IAS which increased our tat to approximately 12 degrees C and no wing ice developed. We were in VMC for most of the flight back. We continued and landed.

Original NASA ASRS Text

Title: A CL65 EICAS alerted WING ANTI ICE DUCT as the crew prepared for the arrival in IFR with icing. An emergency was declared; the speed increased to 320 KTS at 3;000 FT and the flight returned to the departure airport in VMC.

Narrative: This was our first flight of the day. I was flying. We were inbound on the arrival at 11;000 MSL. We were starting our descent when we received a WING ANTI ICE DUCT warning message on EICAS for the left wing. I continued to fly the aircraft and took over control of COM 1. The Captain ran the QRH for the warning message. After completion of the QRH procedures; Captain informed Approach and Company of our situation. With the weather at the Airport IFR (005 BKN Temp 1C; visibility 1.5 SM; wind 260/06 KTS with light snow falling and mist); it was not going to be possible for us to continue to land at our filed destination with the wing anti ice inoperative. In addition; we were in and out of icing conditions (light rime) at the time of the occurrence. We were given vectors and a descent to 5;000 by Approach. We declared an emergency and requested to divert back to our departure airport. ATC gave us vectors and a clearance direct. Due to the cold temperatures at our altitude we requested descent to 3;000 and also requested to fly faster to help increase the TAT to reduce the possibility of ice development on wing. ATC granted us 'speed at our discretion' (due to declared emergency). We flew at approximately 320 IAS which increased our TAT to approximately 12 degrees C and no wing ice developed. We were in VMC for most of the flight back. We continued and landed.

Data retrieved from NASA's ASRS site as of April 2012 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.

A CL65 EICAS alerted wing anti ice duct as the crew prepared for the arrival in IFR with icing. An emergency was declared; the speed increased to 320 KTS at 3;000 ft and the flight returned to the departure airport in VMC.