TB 1-1520-238-20-134
7.3.4 For the right wing outboard pylon
7.3.4.1 Remove the four screws, washers and nuts used to attach connector 4J508 to the wing.
7.3.4.2 Detach connector P106 from the anti-collision light.
7.3.4.3 Remove the two screws and washers that attach the remote control circuit breaker CB204 to the
mounting plate.
7.3.4.4 If needed, to gain access to the aft inboard barrel nut, remove the four screws, washers and nuts
used to attach connector 4J505 to the wing.
7.3.4.5 Using a suitable tool, such as a scribe, remove barrel nuts and retainers. Carefully move discon-
nected components as required to assist in the access to the barrel nuts.
7.3.4.6 Install new barrel nuts and retainers in the support holes.
7.3.4.7 Reinstall connector 4J508, connector P106, the remote control circuit breaker CB204, and (if
removed) connector 4J505.
7.3.5 For the right wing inboard pylon
7.3.5.1 Remove the four screws, washers and nuts used to attach connector 3J508 to the wing.
7.3.5.2 Using a suitable tool, such as a scribe, remove barrel nuts and retainers. Carefully move connector
3J508 as required to assist in the access to the barrel nuts.
7.3.5.3 Install new barrel nuts and retainers in the support holes.
7.3.5.4 Reinstall connector 3J508.
7.3.6 For the left wing outboard pylon
7.3.6.1 Remove the four screws, washers and nuts used to attach connector 1J505 to the wing.
7.3.6.2 Detach connector P105 from the anti-collision light.
7.3.6.3 Remove the two screws and washers that attach the remote control circuit breaker CB201 to the
mounting plate.
7.3.6.4 If needed, to gain access to the aft inboard barrel nut, remove the four screws, washers and nuts
used to attach connector 1J508 to the wing.
7.3.6.5 Using a suitable tool, such as a scribe, remove barrel nuts and retainers. Carefully move discon-
nected components as required to assist in the access to the barrel nuts.
7.3.6.6 Install new barrel nuts and retainers in the support holes.
7.3.6.7 Reinstall connector 1J505, connector P105, the remote control circuit breaker CB201, and if
removed connector 1J508.
7.3.7 For the left wing inboard pylon
7.3.7.1 Remove the four screws, washers and nuts used to attach connector 2J505 to the wing.
7.3.7.2 Using a suitable tool, such as a scribe, remove barrel nuts and retainers. Carefully move connector
2J505 as required to assist in the access to the barrel nuts.
7.3.7.3 Install new barrel nuts and retainers in the support holes.
7.3.7.4 Reinstall connector 2J505.
7.3.8 Reinstall access covers RW7, RW8, LW7 and LW8.
NOTE
Ensure lubricate (MIL-T-83483) is applied to the bolt threads and the bolt
is torqued to 350 inch-pounds.
7.3.9 Reinstall the pylons IAW TM 1-1520-238-23 section 16.2.
7.4 AH-64D Pylon barrel nut replacement procedures
7.4.1 Remove external stores IAW the IETM.
4