TM 55-1520-240-T
6-2.3 TRANSMISSION CHIP DETECTORS AND DEBRIS SCREENS OPERATIONAL CHECK
6-2.3
INITIAL SETUP
Personnel Required:
Applicable Configurations:
Medium Helicopter Repairer (2)
All
Equipment Condition:
Tools:
TM 55-1520-240-23:
Container, Two Quart
Battery Connected
Aircraft Mechanic's Tool Kit,
Electrical Power On
NSN 5180-00323-4692
Hydraulic Power Off
Materials:
Visual Check of Transmission Chip Detectors and
Cloths (E120)
Debris Screens Performed (Task 6-2.2).
TASK
RESULT
CHECK INDICATORS
1. Check that MAINT PNL circuit breaker (1) is closed.
If MAINT PNL circuit breaker (1) is open, close it. If it
opens again, go to Task 8-14.4.
1.1 Check master caution panel (2).
If NO. 1 or NO. 2 ENG CHIP DET (Without 74) ENG 1 or
2 CHIP DETR (With 74) capsule (7 or 8) is lit, go to Task
6-2.4. If XMSN CHIP DET (Without 74) XMSN CHIP
DETR (With 74) capsule (9) is lit, go to Task 6-2.5.
2. Check six TRANSMISSION CHIP DETECTOR indica-
All indicators (3) shall be all-black. If any indicator (3)
tors (3).
displays black-and-white fan, go to Task 6-2.6.
3. Check six TRANSMISSION DEBRIS SCREEN indica-
All indictors (4) shall be all-black. If any indicator (4)
tors (4).
displays black-and-white fan, go to Task 6-2.7.
WITH 37
WARNING
If plug 235P9 is not disconnected
from fuzz burn off module, arcing can
occur while checking chip detectors.
Damage to aircraft or personnel may
result.
3.1 Disconnect plug 235P9 from fuzz burn off module (5).
4. Set and hold GND switch (6) to TEST.
NO. 1 and NO. 2 ENG CHIP DET (Without 74) ENG 1 or
2 CHIP DETR (With 74 capsules (7 and 8) shall come
on. XMSN CHIP DET (Without 74) XMSN CHIP DETR
(With 74) capsule (9) shall come on. All TRANSMIS-
SION CHIP DETECTOR AND DEBRIS SCREEN indica-
tors (3 and 4) shall change to black-and-white fans. If NO.
1 or NO. 2 ENG CHIP DET (Without 74) ENG 1 or 2
CHIP DETR (With 74) capsule (7 or 8) is out, go to Task
4-7.3. If XMSN CHIP DET (Without 74) XMSN CHIP
DETR (With 74) capsule (9) is out, go to Task 6-2.8. If
any indicator (3) is all-black, go to Task 6-2.9. If any
indicator (4) is all-black, go to Task 6-2.10.
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6-32 Change 17
