TM 1-1520-238-23
11-1179
11.278.
TAIL ROTOR DE-ICE BRUSH BLOCK REMOVAL/INSTALLATION – continued
CAUTION
To prevent damage to de-ice equipment,
resistance of tail rotor de-ice brushes
must not exceed 0.0059 OHMS.
g. Check circuit resistance between stackups (2)
and brushes (15), (16), (17), and (18). Use
ohmmeter.
(1) If circuit resistance exceeds 0.0059 ohms,
replace brush and shunt (para 11.279).
(a) Check resistance between forward termi-
nal (19) and brush (17).
(b) Check resistance between forward termi-
nal (19) and brush (15).
(c) Check resistance between aft terminal
(20) and brush (18).
(d) Check resistance between aft terminal
(20) and brush (16).
11.278.6. Installation
CAUTION
Handle brush block with care. Brushes,
springs, and wiring on brush block may
be damaged if brush block is accidently
dropped or handled roughly.
a. Install brush block (12) in housing (7).
(1) Position block (12) in housing (7) with stack-
ups (2) facing outboard and brushes (15),
(16), (17), and (18) alined with grooves in tail
rotor de-ice slip ring (21).
(2) Install four captive screws (14) in housing (7).
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M04-3559-4
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M04-3559-7
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