TM 1-8415-216-12&P
Table 4-2.
Aviation Unit Maintenance Troubleshooting Procedures (continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. UNABLE TO POSITION AH-l SIGHT.
Send operator/wearer with helmet to armament technician (68J) for boresighting.
4. UNABLE TO FASTEN OR ADJUST CHINSTRAP.
Inspect strap assembly, chin for defective hardware or webbing.
Replace strap assembly, chin in accordance with paragraph 4-13c.
5. UNABLE TO ADJUST NAPE STRAP.
Inspect strap assembly, chin for defective hardware or webbing.
Replace strap assembly, chin in accordance with paragraph 4-13c.
6. UNABLE TO KEEP MICROPHONE IN POSITION.
Inspect boom, microphone assembly for loose screw.
If unable to tighten screw, replace in accordance with paragraph 4-13e.
7.
UNABLE TO COMMUNICATE.
Ensure that communications cord is plugged into communication unit and that unit is
working. Ensure helmet connector on left rear side of helmet is secured.
If still unable to hear, perform continuity check as follows:
Step 1. Disconnect microphone cable from microphone.
Step 2. Remove receivers.
Step 3. Using a multimeter (AN/URM-105 C or equivalent), perform Test 1 (refer to
Figure 4-1 or Figure 4-2 as appropriate) in accordance with the appropriate
chart for your communication system (standard or TEMPEST).
If no failure detected, proceed to step 4.
If a failure is detected, replace the communication cord in accordance with
paragraph 4-13f. Proceed to step 5.
NOTE
Numbers in test charts correspond to callouts in illustrations.
4-6
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