TM 55-1520-240-23-3
4-148
REPLACE NO. 2 DIGITAL ELECTRONIC CONTROL UNIT
(Continued)
4-148
6.
Position digital control unit (10) on fuselage (11).
7.
With helper supporting digital electronic control
unit (10), install four bolts (15) and washers (16).
8.
Install bonding jumper (12) with washer (13) and
nut (14).
9.
Connect two electrical connectors (17). Remove
tags.
10.
Remove cap and tag from hose (18). Connect
hose (18) to P3 port (19).
11.
Using low resistance ohmmeter (T7), perform
electrical bonding check (TM 9-6625-975-35)
between digital control unit (10) and fuselage
(11). Resistance shall be no greater than 0.003
ohms.
12.
Using low resistance ohmmeter (T7), perform
electrical bonding check (TM 9-6625-975-35)
between bonding jumper (12) and digital control
unit (10). Resistance shall be no greater than
0.0025 ohms.
FOLLOW-ON MAINTENANCE:
Digital electronic control unit historical files uploaded
(Task 4-149).
Perform operational check of digital electronic control
unit (TM 55-1520-240-T).
END OF TASK
4-491
