A B757-200 recirc fan failed in flight causing the wxr fail; flight dk eqp smke EICAS messages. An e...

Attributes
ACN	895747
Time
Date	201006
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.ARTCC
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Descent
Flight Plan	IFR
Component
Aircraft Component	Air Conditioning Distribution System
Person 1
Function	First Officer Pilot Flying
Experience	Flight Crew Last 90 Days 50 Flight Crew Total 8400 Flight Crew Type 500
Person 2
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 95 Flight Crew Type 95
Events
Anomaly	Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor

Narrative:

While in cruise we received a wxr fail (weather radar failure) message on the radar. Shortly thereafter there was a faint and very brief smell of smoke accompanied by flight dk eqp smke and left recirc fan messages. This was followed in about a minute by eqpt ovht message. Eadis (electronic attitude display indicators) lost color. All checklists were followed to the extent possible. We could not select altitude fan for eqpt ovht because the flight dk eqp smke message did not extinguish. We then notified operations. We turned off both radar switches thinking the radar failure probably started the chain of events. We declared an emergency and kept our speed fast until in a position to make a safe landing. Estimate time in flight with messages at 20 minutes before landing. Landing was uneventful. We did have a map shift and not sure that was related to component failure but other than that (and the color loss on the eadi) all normal flight instruments fully operational all the way to the gate. We quickly removed power from the airplane at the gate and discussed the events with the mechanic.

Original NASA ASRS Text

Title: A B757-200 RECIRC FAN failed in flight causing the WXR FAIL; FLT DK EQP SMKE EICAS messages. An emergency was declared and the flight continued to its nearby destination. A map shift and loss of EADI color may be related to this issue.

Narrative: While in cruise we received a WXR FAIL (weather radar failure) message on the radar. Shortly thereafter there was a faint and very brief smell of smoke accompanied by FLT DK EQP SMKE and L RECIRC FAN messages. This was followed in about a minute by EQPT OVHT message. EADIs (Electronic Attitude Display Indicators) lost color. All checklists were followed to the extent possible. We could not select ALT FAN for EQPT OVHT because the FLT DK EQP SMKE message did not extinguish. We then notified Operations. We turned off both radar switches thinking the radar failure probably started the chain of events. We declared an emergency and kept our speed fast until in a position to make a safe landing. Estimate time in flight with messages at 20 minutes before landing. Landing was uneventful. We did have a map shift and not sure that was related to component failure but other than that (and the color loss on the EADI) all normal flight instruments fully operational all the way to the gate. We quickly removed power from the airplane at the gate and discussed the events with the Mechanic.

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 B757-200 recirc fan failed in flight causing the wxr fail; flight dk eqp smke EICAS messages. An emergency was declared and the flight continued to its nearby destination. A map shift and loss of eadi color may be related to this issue.