> -----Original Message-----
> From: Cisco.com Field Notice
> [mailto:cco-pat-bouncehandler@external.cisco.com]
> Sent: Wednesday, September 21, 2005 1:16 PM
> To: Buhrmaster, Gary
> Subject: Cisco Field Notice: FN - 61878 - 15540-FTMP - 15540 Critical 
> Fan Tray Failures - Upgrade Program
> 
> Message Type : Field Notice    
>     
> Title: Cisco Field Notice: FN - 61878 - 15540-FTMP - 15540 Critical 
> Fan Tray Failures - Upgrade Program
> 
> URL: 
> http://www.cisco.com/en/US/customer/products/hw/optical/ps2011
> /products_field_notice09186a008051ba84.shtml
> 
> Posted: September 14, 2005
> 
> Summary: An issue has been identified at customer sites and verified 
> through Engineering Failure Analysis (EFA) indicating a vulnerability 
> with three under-rated electrolytic capacitors positioned at the -48V 
> input on the 15540-FTMP. Failure of one or more of these capacitors 
> can result in a failure of all eight fans within the 15540-FTMP 
> assembly. For a fully populated chassis, system assemblies may begin 
> failing 15 minutes after a 15540-FTMP failure. A sparsely populated 
> chassis with a low ambient temperature may never reach critical
> temperature.    
>     
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