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  #1  
Unread 06-02-09, 07:23 PM
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skymstr02 skymstr02 is offline
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New Cessna Service Bulletin 1973 and up 337's

MEB09-3 titled Electrical Switches Inspection and Replacement dated May 11, 2009. Effectivity: T303, 337G-H, T337G, P337H, F337G, F337H, FT337GP, FT337HP. Purpose: to inspect switched installed in the landing light, taxi light and beacon light circuits for time in service. Switches that have been in service for 4 or more years shall be replaced and the month and year of installation shall be written on the new replacement switch. Compliance: Mandatory: shall be accomplished within the next 400 hours of operation or 12 months, whichever occurs first. NOTE: For future switch replacement intervals after compliance with this Service Bulletin, refer to the applicable airplane Service/Maintenance Manual. Revised switch replacement intervals are in development and will be issued in the next revision to the affected airplanes Service/Maintenance Manuals.

I want to interject something here, there is no such thing as a "Mandatory" service bulletin. The only things that are mandatory are AD notes and type certificate data sheet limitations. If I were to arbitrarily start replacing switches, it would be master and alternator switches as they cause many problems associated with age and high resistance.
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  #2  
Unread 06-03-09, 10:11 PM
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Skymaster337B Skymaster337B is offline
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Why the SB about switches of all things? Has there been an accident because of switches? I'm not sure I understand Cessna's motives...a 4 year switch? What about all the 30 & 40 year old switches on other Cessna switches?
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Unread 06-04-09, 09:04 PM
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Probably just that Cessna's running a little short of money. There is a sort of depression on, you know... And I haven't heard of Cessna getting any "bailout" money.
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