ICA-D212-725 (28)
Page 13 of 48
CHAPTER 28 – FUEL SYSTEM (28-00-00)
COPYRIGHT
2007 BY DART AEROSPACE LTD.
THIS DOCUMENT IS PRIVATE AND CONFIDENTIAL AND IS SUPPLIED ON THE EXPRESS CONDITION THAT IT IS NOT TO BE USED FOR ANY PURPOSE OR COPIED OR COMMUNICATED TO ANY
OTHER PERSON WITHOUT WRITTEN PERMISSION FROM DART AEROSPACE LTD.
Revision:
6
Date: 13.08.26
28.8.1.4
Disconnect electrical wiring between
cabin structure and fuel cell sump components:
Boost pump, flow switch, sump drain valve, and
quantity gage circuit connectors.
28.8.1.5
Disconnect de-fueling valve crossover
(18, Figure 28-3) at flange.
28.8.1.6
Remove 12 bolts around base plate of
sump assembly (19). Lower sump base enough to
reach through opening. Disconnect hoses at
inboard sides of pump (17) outlet cross fitting and
flow switch (20). Disconnect quantity probe wires
from connectors on inside of sump assembly (19).
Remove sump assembly and packing.
28.8.1.7
Disconnect fuel pressure hose (8) at
outlet elbow on crossover assembly at aft end of
cell. Disconnect crossover tubes (12) at F.S. 166
bulkhead and at clamped connection to capped
auxiliary fuel provision (10). Remove bolts to
detach flange of crossover assembly (9) from cell
port. Remove crossover assembly with fuel
pressure hose attached on inner side.
28.8.1.8
Remove bolts to detach forward drain
valve and plate assembly and packing.
28.8.1.9
Disconnect hose from vent fitting (4).
Remove nuts, two bolts, vent fitting, and packing.
28.8.1.10 Remove two pairs of bolts from
inboard side of B.L. 14 beam at F.S. 119.82 and
144.82.
28.8.1.11 Remove 12 bolts and access bar (2) to
open access slit in top of forward compartment of
cell.
28.8.1.12 Remove two bolts to detach ejector
pump (23) from cross-feed port in forward end of
cell.
28.8.1.13 At front of F.S. 102 bulkhead, loosen
clamp and detach hose from cross-feed fitting.
Disconnect forward interconnect tube from fitting.
Remove nut, washer, packing, and fitting.
28.8.1.14 Remove support cord from hangers
around top of cell and cavity.
NOTE
Steps 28.8.1.15 and 28.8.1.16 can optionally be
postponed until after removal of cell, or omitted if cell
is not to be replaced.
28.8.1.15 Disconnect hose (16) at union on front
of cell divider. Detach hose support clamps at
quantity gage probe and in vent port. Remove
ejector pump (23) with attached hoses.
28.8.1.16 Remove two quantity gage probes (7)
with attaching clamps and bolts.
28.8.1.17
Lift fuel cell (1) from cavity.
28.8.1.18 Remove flapper valve (paragraph 28-
43).
28.8.1.19 Install protective caps plugs in open fuel
lines and over cell openings.
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