B757 first officer reported a weather radar failure during taxi out and returned to the gate for mai...

Attributes
ACN	1366155
Time
Date	201606
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Weather Radar
Person 1
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Type 238
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

We pushed from the gate late due to late inbound. Upon approaching the runway for takeoff we received wind-shear system EICAS message and weather radar fail on the nd; we returned to the gate per mx and dispatch. Mx replaced the wx radar computer and we taxied out for takeoff after another 1 hour delay. We tested the radar and were painting wx prior to departure. Climbing through about 6000 ft we received the same messages. We alerted dispatch and maintenance control and later decided to return due to the wx over the atlantic.

Original NASA ASRS Text

Title: B757 First Officer reported a weather radar failure during taxi out and returned to the gate for maintenance. After maintenance; the radar appeared to function normally and the flight departed. During climb; another weather radar fail was displayed and the crew elected to return to the departure airport due to expected weather enroute.

Narrative: We pushed from the gate late due to late inbound. Upon approaching the runway for takeoff we received wind-shear system EICAS message and Weather Radar fail on the ND; we returned to the gate per MX and dispatch. Mx replaced the Wx radar computer and we taxied out for takeoff after another 1 hour delay. We tested the Radar and were painting Wx prior to departure. Climbing through about 6000 ft we received the same messages. We alerted Dispatch and Maintenance Control and later decided to return due to the Wx over the Atlantic.

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.