t Pump Manifolds Aircraft serial numbers 5099 through 5141. 5144 and 5145.Compliance with this customer bulletin is to be accomplished at the Wing Tank Internal. BL0 - BL180 Detailed Inspection. 57.00.00 or 3000 landings. whichever occurs first. 28 MAN N/A 09 May 2008 I CB 980680 CB 68 Re