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Date: Tue, 01 Feb 2011 14:51:50 -0500
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From: "Bill Harrelson" <n5zq@verizon.net>
Subject: Fw: [LML] Re: Dresser tire problem
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-----Original Message----- 
From: Williams, Richard S. (HQ-QA000)
Sent: Tuesday, February 01, 2011 7:36 AM
To: Bill Harrelson
Subject: RE: [LML] Re: Dresser tire problem

Bill,

Thanks for posting this - I need to get on the LML and do this myself. 
Please feel free to include my private email address cj6wms@gmail.com with 
any follow on postings so folks can correspond directly with me.

In follow up, the tire was not impacting anything during rotation or 
retraction except the pavement.  We examined the gear retraction on that 
side very carefully with the aircraft on jacks just last month, with this 
tire mounted.  Also, there are multiple cracks oriented in different 
directions, not just in the direction of rotation.  Some of them form a "Y", 
as matter of fact.  I am in contact with Dresser, and will send the tire 
back for analysis.

Interestingly, I replaced the main gear retract cylinder on that side last 
month because of a hydraulic leak.  Hydraulic fluid did get on the brake 
assembly during flight, and probably on the tire as well.  That problem was 
solved within a week of first showing itself - but that was the only anomaly 
with the right main gear assembly since I put the suspect tire on last 
month.  I would not expect contact with hydraulic fluid to adversely affect 
a tire and make it subject to this sort of phenomenon.

I think it's safest to consider this is a potential materials or 
manufacturing issue until proven otherwise, and visually inspect similar 
tires in the fleet to make sure there are no occurrences in other aircraft.

Best,

Rich