Ramon,
You might be amazed at what cleaning crews use on the interior and
exterior of aircraft.
David A. Douthit
Manager
LoCan LLC
Dehoyos, Ramon wrote:
> Thanks for the correction.
> Ramon
>
>
>
>>-----Original Message-----
>>From: Crepeau, Phil (Space Technology)
>>Sent: Tuesday, March 09, 2004 10:44 AM
>>To: Dehoyos, Ramon
>>Subject: RE: [TN] FW: [TN] Pros and Cons on Type UR vice Type AR
>>
>>
>Conformal Coating
>
>
>>i think you meant type ar not ur.
>>
>>-----Original Message-----
>>From: Dehoyos, Ramon (NG)
>>Sent: Tuesday, March 09, 2004 6:08 AM
>>To: [log in to unmask]
>>Subject: [TN] FW: [TN] Pros and Cons on Type UR vice Type AR Conformal
>>Coating
>>
>>
>> One of the disadvantages of UR coating is that it will not
>>
>>
>withstand
>
>
>>solvents. Besides boards in aircrafts that might be closed to the fuel
>>tank or in automobile engine compartments, most boards are not in
>>
>>
>proximity
>
>
>>to fuels, acetone or alcohol. So UR is plenty good. It saves a lot of
>>
>>
>boards
>
>
>>from being damaged during rework due to the simplicity of removal.
>> Regards,
>> Ramon
>>
>>
>>
>>>-----Original Message-----
>>>From: Dehoyos, Ramon
>>>Sent: Tuesday, March 09, 2004 8:15 AM
>>>To: [log in to unmask]
>>>Subject: Re: [TN] Pros and Cons on Type UR vice Type AR Conformal
>>>
>>>
>>Coating
>>
>>
>>> One thing to know is that AR can be coated to patch UR but not
>>>
>>>
>the
>
>
>>>other way around. Patching AR with UR creates a mix that takes too long
>>>
>>>
>to
>
>
>>>dry, stays soft. So to switch from UR to AR is recommended.
>>> Regards,
>>> Ramon
>>>
>>>
>>>
>>>>-----Original Message-----
>>>>From: - Bogert [SMTP:[log in to unmask]]
>>>>Sent: Monday, March 08, 2004 4:55 PM
>>>>To:
>>>>Subject: [TN] Pros and Cons on Type UR vice Type AR Conformal
>>>>
>>>>
>>Coating
>>
>>
>>>>As a Class 3 customer we are considering mandating transition from
>>>>
>>>>
>Type
>
>
>>UR
>>
>>
>>>to Type AR conformal coating, to make it easier to replace failed
>>>components. Are there any Class 3 users of Type AR coating? What is
>>>
>>>
>>track
>>
>>
>>>record for using Type AR? Are there any compatibility issues with
>>>
>>>
>certain
>
>
>>>types of solder masks? Any input you have would help. Another
>>>
>>>
>advantage
>
>
>>>with AR would be for returned equipment. The OEM could remove all the
>>>coating from an assembly using alcohol, then perform
>>>
>>>
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>>>>Please visit IPC web site
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>>>>
>>http://www.ipc.org/contentpage.asp?Pageid=4.3.16
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>>
>>>for additional information, or contact Keach Sasamori at [log in to unmask]
>>>
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>or
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>
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>>>>-----------------------------------------------------
>>>>bed-of-nails testing to quickly identify failed components.
>>>>
>>>>
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