Section VII. EXTENSION CABLE TROUBLESHOOTING

TM 9-1270-212-l4&P

Section VII. EXTENSION CABLE TROUBLESHOOTING

diagram (fig. 1-13). Repair the extension cable, if possible.

4-27. General.

Replace the extension cable if the problem cannot be

remedied.

This section provides troubleshooting procedures for the

extension cable by using the fire control subsystem test set.

4-29. Extension Cable Helicopter Checkout Procedures.

The tests are performed on the bench or in the helicopter.

Disconnect W 1 PI from the gunner linkage. Connect

4-28. Extension Cable Bench Checkout Procedures.

W1P1 to A2P1 on the known-good pilot linkage. Perform

steps 1, 2, and 3 of table 4-2 in paragraph 4-14. If a failure

Connect the extension cable between A3P1 or A2P1 of a

occurs, use a multimeter and check for continuity, opens,

known-good linkage assembly and the J15 EXT CABLE

or shorts (shields also). Refer to the extension cable

receptacle on the test set. Perform the linkage assembly test

schematic diagram (fig. 1-13). Repair the extension cable, if

(paragraph 4-18). If a failure occurs, use a separate

possible. Replace the extension cable if the problem cannot

multimeter and check for continuity, opens, or shorts

be remedied.

(shields also). Refer to the extension cable schematic

Section VIII. PREEMBARKATION INSPECTION OF MATERIEL

IN UNITS ALERTED FOR OVERSEAS MOVEMENT

4-30. General.

c. Material must be free of burrs, particularly those on

functional surfaces.

This inspection is conducted on materiel in alerted units

d. Parts must not be cracked, bent, distorted, or

scheduled for overseas duty to insure that such materiel will

damaged and must be free of detrimental wear.

not become unserviceable in a relatively short time. The

inspection prescribes a higher percentage of remaining

e. Rivets must be tight.

usable life in serviceable materiel to meet a specific need

beyond minimum serviceability.

f. Painted surfaces must be free of bare spots.

g. Operating controls must function smoothly.

4-31. Inspection Points.

h. Identification plates must be present and secure.

a. Screwheads must be in serviceable condition, and

threads must not be stripped. Internal threads must not be

i. Inspect electrical components for improper

stripped.

functioning, physical damage, and missing parts.

b. Cable assemblies must not have loose or damaged

j. Inspect optical parts for cracks, scratches, and

connections, cut or worn insulation, broken wires, kinks, or

moisture on the inside of the optical cell.

sharp bends.

4-48