TM 5-3805-254-20-1
ORGANIZATIONAL TROUBLESHOOTING - CONTINUED
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
60.
AIR HORN DOES NOT WORK CONTINUED.
Step 4. Check output hose (1) for leaks as follows: Pull down lever (2) and listen for hissing nose from
output hose (1). If hissing nose is heard, using number two cross-tip screwdriver, unscrew and
take out 14 screws (3), and take off molding (4). Take down headlining retainer (5) and
headlining (6). Peel insulation (7) down gently.
a. If output hose fitting (8) is loose, using 9/16-inch open-end wrench, tighten. Put
insulation (7) in place, put up headlining (6), and headlining retainer (5). Screw in and
tighten 14 screws (3), using number two cross-tip screwdriver. Put cover (9) in place,
screw in and tighten two screws (10), using number one cross-tip screwdriver. Put
pull chain (11) in place, using 6-inch slip-joint pliers, put in cotter pin (12).
b. If output hose (1) is leaking, replace. Using 9/16-inch open-end wrench, unscrew and
take off output hose fitting (13) at valve (14). Using 9/16-inch open-end wrench,
unscrew and take off output hose fitting (8), at fitting (15). Screw on and tighten,
output hose fitting (13) at valve (14) using 9/16-inch open-end wrench. Screw on and
tighten, output hose fitting (8) at fitting (15) using 9/16-inch open-end wrench. Put
insulation (7) in place, put up headlining (6) and headlining retainer (5). Screw in and
tighten 14 screws (3) using number two cross-tip screwdriver. Put cover (9) in place,
screw in and tighten two screws (10) using number one cross-tip screwdriver. Put
pull chain (11) in place, using 6-inch slip-joint pliers, put in cotter pin (12).
c. If hissing noise is not heard, replace air horn (16) (page 2-1329). Put cover (9) in
place, screw in and tighten two screws (10), using number one cross-tip screwdriver.
Put pull chain (11) in place, using 6-inch slip-joint pliers, put in cotter pin (12).
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