Section IV. TROUBLESHOOTING
4-8. AVIATION UNIT MAINTENANCE TROUBLESHOOTING
Table 4-2 provides an index of common malfunctions of helmet components and directs you to
the procedures required to eliminate those malfunctions. When examining the table keep the
following in mind:
1. You should first find the malfunction that most closely describes the problem, then
perform the tests, inspections, and corrective actions in the order in which they are
2. This manual may not list every possible malfunction. If you encounter a malfunction
not listed in the table and are unable to solve it, notify your supervisor.
Aviation Unit Maintenance Troubleshooting Procedures
TEST OR INSPECTION
1. UNABLE TO RAISE OR LOWER VISOR LENS.
Step 1. Inspect for defective visor knob.
Replace defective visor in accordance with paragraph 4-13h.
Step 2. Inspect for defective visor tracks.
Replace defective visor tracks in accordance with paragraph 4-13h.
Step 3. Inspect for defective visor housing.
Replace defective visor housing in accordance with paragraph 4-13h.
Step 4. Inspect visor lenses for defects.
Replace defective lens in accordance with paragraph 4-13h.
Step 5. Disassemble visor assembly in accordance with paragraph 4-13h, and clean
dust, dirt, and foreign objects from the tracks and visor guides using a soft
cleaning cloth dampened with isopropyl alcohol and water.
2. UNABLE TO OPERATE GOGGLES.
Refer to TM 11-5855-263-10.