AFT FUEL CELL PILOT VALVE HOSE REPLACEMENT continued
Jet fuel will cause external surface of fuel
cell to swell, delaminate, and leak if al-
lowed to contact the fuel cell more than
72 HOURS. Keep jet fuel away from the
outside of fuel cells.
a. Remove aft pilot valve hose (1).
(1) Hold pilot valve nipple (2). Remove hose nut
(3) from nipple (2).
(2) Hold shutoff valve nipple (4). Remove hose
nut (5) from nipple (4).
a. Wipe removed and attaching parts with a
a. Check pilot valve union and shutoff valve
union for thread damage, cracks, and
rounded wrench flats (para 10.1).
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