Precison SB/AD
Hi RVers, my name is Peter Nielson and I am the Product Support Mgr. at Precision Airmotive. I would be happy to answer any questions, but first I would like to clear up a few things about the AD.
1. The SB and AD only affects servos built, overhauled, or repaired since 8/22/06. If you have a new or rebuilt Precision factory servo, you can check our website for a list of S/Ns to see if your unit is affected. Some engines delivered after 8/08 may have servos that were built before the effective date and do not have the problem. There is a list for certified servos, RSA-5 or 10, which are covered by bulletin PRS-107 and one for Silver Hawk servos, the EX-5 and 10, covered by bulletin PEX-1. If you have a factory servo and it hasn't been repaired during that time and it's not on the lists, then you are not affected.
2. During 2006 our vendor that makes these gaskets informed us they were not going to make this material anymore, so we would have choose a new material. Our choice wasn't so good, obviously. The original installation prior to this AD used 40-50 lb/inches of torque on the plug and a single strand of .015" safety wire. This is the way it had always been done since Bendix designed these servos. After investigating the situation, we decided to increase the torque, as well as find a better gasket material. We also tried a different safety wire configuration to better hold the plug tight until a replacement gasket is found.
3. There are revised versions of both bulletins now on our website, which contain the new gasket P/N and instructions for a final terminating action. For the certified servos, which our the only ones actually affected by the AD, the terminating action will not be complete until a revised AD is released, but that will be soon. The gaskets are available through our distributors for 70 cents. You can also get them directly from us if you have the serial number of your servo. We will ship them for free, but only by ground.
4. These bulletins only affect Precision or Bendix servos, not Airflow Performance or Continental fuel systems. If your servo was overhauled by someone using parts from another supplier, such as Kelly Aerospace, you may not be affected, but I would check with your overhauler to be sure.