TM 55-1520-240-T
13-1.3 HEATING AND VENTILATING SYSTEM VISUAL CHECK
13-1.3
INITIAL SETUP
Applicable Configurations:
All
References:
TM 55-1520-240-23
Tools:
Aircraft Mechanic's Tool Kit,
Equipment Condition:
NSN 5180-00-323-4692
TM 55-1520-240-23
Materials:
Battery Disconnected
None
Electrical Power Off
Hydraulic Power Off
Personnel Required:
Heater Compartment Acoustic
67U10 Medium Helicopter Repairer
Blanket Removed
TASK
RESULT
1.
Check air pressure switch (1).
If switch (1) is loose or damaged, tighten or replace it as
required. If tubes, wiring, or electrical connector to switch
are damaged, repair or replace them as required.
2.
Check heater fan (2).
If fan (2) is loose or damaged, tighten or replace it as
required. If wiring or electrical connector to fan is damaged,
repair or replace it as required.
3.
Check heater control relay box (3).
If box (3) is loose or damaged, tighten or replace it as
required. If wiring or electrical connector to box is damaged,
repair or replace it as required.
4.
Check temperature controller (4).
If controller (4) is loose or damaged, tighten or replace it as
required. If wiring or electrical connector to controller is
damaged, repair or replace it as required.
5.
Check air inlet duct (5).
If duct (5) is loose or torn, tighten or replace it as required.
6.
Check heater fuel control (6).
If control (6) is loose or damaged, tighten or replace it as
required. If fuel hoses, wiring or electrical connector to
control is damaged. repair or replace it as required.
7.
Check heater ignition unit (7).
If ignition unit (7) is loose or damaged, tighten or replace it
as required. If wiring, electrical connector. or shielded lead
(8) to ignition unit is damaged, repair or replace it as
required.
8.
Check boater (9).
If heater (9) is damaged, replace it.
9.
Check exhaust shroud (10).
If shroud (10) is damaged, repair or replace it as required.
10. Check three temperature switches (11).
If any switch ( 1 ) is loose or damaged, tighten or replace it
as required. If wiring to any switch is damaged, repair or
replace it as required.
13-4
GO TO NEXT PAGE
