SRC Forum - Message Replies
Forum: Reliability & Maintainability Questions and Answers
Topic: Reliability & Maintainability Questions and Answers
Topic Posted by: Reliability & Maintainability Forum
Organization: System Reliability Center
Date Posted: Mon Aug 31 12:47:36 US/Eastern 1998
Posted by: Dickie Young
Date posted: Mon Jan 31 16:22:25 US/Eastern 2005
Subject: Failure rate
I am looking for the failure rate for a piston rod scraper use for landing gear application.
Subject: NPRD Failure Rate
Reply Posted by: bwd
Date Posted: Tue Feb 8 13:56:52 US/Eastern 2005
NPRD-95 was searched for a piston rod scraper. I could not find a specific scraper failure rate so, similar items were evaluated. One item is a slip ring assembly which has a failure rate of 2.58 failures per million hours and a ring seal which has a failure rate of 3.68 failure per million hours. These items are not specifically the same but have some similar characteristics. One of these values could be used as first approximate estimate to be followed with vendor data or testing to confirm or change the estimate.