Page 33 - August 2015 Volume 9, Number 8

Technically... Service Bulletins
Issued: August 2011, Revised: September 2015
Synopsis of Change: This Service Bulletin has been revised to introduce fuel cell gasket P/N 50-921587-0011 as a replacement for fuel cell gasket P/N 50-921587-7. Fuel cell gasket P/N 50-921587-9, which was introduced in the original issue of this Service Bulletin, is still allowed. Both replacement gaskets provide improved moisture resistance over the original P/N 50- 921587-7 gasket and may be used interchangeably on the same airframe.
If Service Bulletin 28-4059 (issued August, 2011), has been accomplished, it is not necessary to replace the P/N 50-921587-9 gasket with the P/N 50- 921587-0011 gasket. The P/N 50-921587-9 gasket may be used until the supply is exhausted. For optimal moisture resistance, it is recommended that the P/N 50-921587-0011 gasket be installed when the fuel cell is opened for maintenance.
Effectivity:
Airplanes Model C90A, (C90B), C90GT, C90GTi, (C90GTx), King Air Serial Numbers LJ-1599 through LJ-2003; Model B200, Super King Air Serial numbers BB-1735 through BB-2016; Model B200C, Super King Air Serial Numbers BL-141 through BL-165; Model B200GT, Super King Air Serial Numbers BY-1 through BY-113; Model B300, (350), (350i), (350ER), Super King Air Serial Numbers FL-284 through FL-741; Model B300C, (350C), (350CER), Super King Air Serial Numbers FM-11 through FM-46.
Spares The following models and serials that have installed gasket P/N 50-921587-7 as a spare part:
All King Air Models: All Serial Numbers.
If you are no longer in possession of the airplane, please forward this information to the present owner.
Reason: This Service Bulletin is being issued to install a more moisture- resistant gasket for use on the fuel cell covers.
Description: This Service Bulletin announces the availability of fluorosilicone rubber gasket, P/N 50-921587-0011, as the preferred replacement for gasket P/N 50-921587-7 and gasket P/N 50-921587-9.
Warranty: Warranty coverage offered in this Service Bulletin will expire six (6) months from the original issue date. After this date, the owner/operator assumes the responsibility for compliance cost. Beechcraft Corporation (BC) reserves the right to void continued warranty coverage in the area affected
by this Service Bulletin until the date the Service Bulletin is accomplished
by an HBC Authorized Service Center (ASC).
OCTOBER 2015
RECENT SERVICE BULLETINS,
ADVISORY DIRECTIVES
AND SAFETY COMMUNICATIONS
Service Bulletin 28-4059, Rev. 1: Fuel – Introduction of Improved Fuel Cell Gasket

KING AIR MAGAZINE • 31