I did a little more digging on the Esterline web page and looked at the
photo a little closer, and that relay doesn't fall into the ones that have
the space restrictions. This is the relay that is on that board:
http://us.leachint.fr/aerospace/f250/
Steve
On Tue, Dec 1, 2015 at 12:41 PM, Steve Gregory <[log in to unmask]> wrote:
> There is something that I noticed on the photo of the electronic module.
> The board on the left that has the four Leach relays looks like there was a
> violation of a documented recommendation by Leach of the positioning of the
> relays next to each other. The document states that the permanent magnet
> inside the relay could affect the performance of another relay next to it
> if it is oriented in the same direction and not separated by at least 1/8":
>
> http://www.leachintl2.com/english/english1/vol0/properties/N023eng.htm
>
> It looks to me like all four are oriented the same way and looks to me
> like they're closer than 1/8" = .125" = 3.175mm to each other. What do you
> think?
>
> Steve
>
> On Tue, Dec 1, 2015 at 11:37 AM, Stadem, Richard D. <
> [log in to unmask]> wrote:
>
>> Agreed. There was no redundancy here, nor was there an effective default
>> condition.
>>
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Ahne Oosterhof
>> Sent: Tuesday, December 01, 2015 11:35 AM
>> To: [log in to unmask]
>> Subject: Re: [TN] Airbus crash pinned (in part) on solder joint failures
>>
>> Figure 35: Electronic Module of RTLU
>>
>> Not much of a failure to cause the loss of life and an aircraft!
>>
>> Conclusion: End-use of a board module dictates extreme level of attention
>> to design and testing protocols.
>>
>> Ahne.
>>
>> -----Original Message-----
>> From: TechNet [mailto:[log in to unmask]] On Behalf Of Mike Buetow
>> Sent: Tuesday, December 1, 2015 6:28 AM
>> To: [log in to unmask]
>> Subject: [TN] Airbus crash pinned (in part) on solder joint failures
>>
>> Here's the report: http://kemhubri.dephub.go.id/knkt/ntsc_home/ntsc.htm
>>
>>
>>
>> Discussion of the electrical short and cracked solder joint begins on
>> page 104.
>>
>>
>>
>>
>>
>> Best,
>>
>>
>>
>> Mike
>>
>>
>>
>> Mike Buetow
>>
>> PCD&F/Circuits Assembly
>>
>> w/m: 617-327-4702
>>
>> @mikebuetow
>>
>>
>>
>> The 2015 CIRCUITS ASSEMBLY *Directory of EMS Companies:*
>> circuitsassembly.com/dems
>>
>>
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