Erj-145 first officer reported experiencing a malfunction of the aircraft's anti-ice system; which l...

Narrative:

Shortly after takeoff; at approximately 12 thousand feet; we encountered icing conditions. The wing anti ice did not open and we received an amber wing anti/ice fail message. We expedited our climb to get through the icing layer and since we had previously completed [an inbound] flight; and we would soon exit the IMC condition. We completed the checklist and at approximately FL180; we received an anti-ice inoperative warning. We ran the appropriate checklist and shortly after this message at approximately FL200; we received a pack 1 closed message. Pack 2 was deferred on the ground due to issues with it overheating which caused it to stop working. We began losing pressurization and the cabin altitude began to climb. The captain requested that we identify as an emergency; which I did and I requested a descent via an area without icing conditions. ATC provided vectors and I put on my oxygen mask. The captain and I switched roles and I became pilot flying. The captain also put on his oxygen masks and we began descending to 4 thousand feet. The captain began coordinating with ATC and the remaining descent/in-range items were completed. The captain and I switched roles again. The plane would be overweight for the landing so we completed overweight landing checklist and ran the performance numbers for the landing. A landing was completed within a 100-200 foot per minute touchdown without incident. Maintenance was called and the incident reported to the company.

Original NASA ASRS Text

Title: ERJ-145 First Officer reported experiencing a malfunction of the aircraft's anti-ice system; which led to a loss of cabin pressurization due to another pneumatic system issue.

Narrative: Shortly after takeoff; at approximately 12 thousand feet; we encountered icing conditions. The wing anti ice did not open and we received an amber Wing Anti/Ice Fail message. We expedited our climb to get through the icing layer and since we had previously completed [an inbound] flight; and we would soon exit the IMC condition. We completed the checklist and at approximately FL180; we received an Anti-Ice inoperative warning. We ran the appropriate checklist and shortly after this message at approximately FL200; we received a Pack 1 Closed message. Pack 2 was deferred on the ground due to issues with it overheating which caused it to stop working. We began losing pressurization and the cabin altitude began to climb. The Captain requested that we identify as an emergency; which I did and I requested a descent via an area without icing conditions. ATC provided vectors and I put on my oxygen mask. The Captain and I switched roles and I became Pilot Flying. The Captain also put on his oxygen masks and we began descending to 4 thousand feet. The Captain began coordinating with ATC and the remaining descent/in-range items were completed. The Captain and I switched roles again. The plane would be overweight for the landing so we completed overweight landing checklist and ran the performance numbers for the landing. A landing was completed within a 100-200 foot per minute touchdown without incident. Maintenance was called and the incident reported to the company.

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.

Attributes
ACN	1532021
Time
Date	201804
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	Us
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Make Model Name	EMB ERJ 145 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Ice/Rain Protection System
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Weight And Balance

Erj-145 first officer reported experiencing a malfunction of the aircraft's anti-ice system; which led to a loss of cabin pressurization due to another pneumatic system issue.