Alan,

A difficult and increasing problem. In defence industry, fitted component
operational life is becoming an ever longer feast while component availability
is an ever shorter honeymoon. Such is life!

One answer,  I think open to non-BAE SYSTEMS companies but apologies to others
if not,

 Richard G. Parker
 Principal Reliability Engineer
 Operations-PAG
 BAE SYSTEMS Electronics Ltd
 +44(0)1245 242267

Also, more generally,

 Component Obsolescence Group  (COG)
 c/o TMT Associates
 Harpenden
 +44(0)1582 762934

And two companies who specialise in long term storage problems, etc,

 John Jones
 IGG Component Technology Ltd
 Fareham
 +44(0)1329 829311

 Eltek Semiconductors Ltd
 Norman vincent
 Dartmouth
 +44(0)1803 834455

Hope these can help you. I do not class myself as an expert so please do not
contact me for advice.

Barry L. Bates  (Producibility Engineer)
01983  20 2629
[log in to unmask]

BAE SYSTEMS
Newport Rd
Cowes
Isle of Wight
PO31 8PF



-----Original Message-----
From:   Alan Peters [SMTP:[log in to unmask]]
Sent:   08 February 2001 13:32
To:     [log in to unmask]
Subject:        [TN] Extending the lives of components.

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Hello

Does anyone have any ideas where I could find out more information by
"constructional type" of the predicted life and failings, due to ageing, of
discrete high reliability /military standard electronic components?

We want to have confidence that  electronic components fitted to a 25 year old
system  will continue to function for  35 years. These components are in a
sealed (
non hermetic) benign environment rarely being powered up. Does anyone have any
histories/references by "constructional type" of discrete electronic
components
degrading and failing due to age?

Alan Peters
Failure Analysis Engineer
BAE SYSTEMS Plymouth



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