We were minutes away from an engine tear-down, when we tried one more time to extract the broken tension bolt.  The bore scope allowed us to see exactly where the pilot hole was drilled into the broken piece; the left-hand drill bits would not grab on and extract the part but did help in enlarging the hole and perhaps loosening the threads a little.  Ultimately I was able to start an easy-out with light tapping and it grabbed on – the result is in the attached photo.  The easy-out is welded to the end of the original broken bolt and you can see that a spiral of RTV was applied to the length of the bolt between the threads and the bolt head.

Jeff

 

From: jeffurs@xplornet.com [mailto:jeffurs@xplornet.com]
Sent: Sunday, January 30, 2011 6:23 PM
To: Jeff Whaley
Subject: 13B

 

 

 

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