TABLE 2-1. OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES
(continued)
B - Before (pre-flight)
A - After (post-flight)
ITEM
NO.
INTERVAL
B
A
ITEM TO BE INSPECTED/
PROCEDURE
NOT FULLY MISSION
CAPABLE IF:
5a.
5b.
6.
7.
8.
9.
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
Earphones (and CEP, if used).
Check operation in aircraft.
CEP.
Check foam tips of earplugs for dirt.1
Check foam tips of earplugs for wear.
Check operation of earphones and
CEP.
Strap Assembly, Chin.
Check attachment.
Check fit of nape assembly.
Check D-rings for breaks, strap for
tears/fraying, and nape assembly for
holes and cracks.
Microphone/boom assembly.
Check attachment of set screws.
Check operation in aircraft.
Visor assembly.
Check attachment of hardware.
Check adjustment of housing.
Check housing for holes and cracks.
Check lenses for dirt or scratches.
Check operation of lenses.
Check function of locking
mechanism.
Oxygen mask cowling.
Check adjustment of straps.
Any malfunctions exist.
Foam tips are worn.
Earphones and CEP do not work.2
Not properly attached to helmet.
Nape assembly is improperly fitted
D-rings are broken,strap is torn/
frayed, or nape assembly has holes or
cracks.
Screws loose or missing.
Any malfunctions exist.
Loose or missing.
Improperly adjusted.
Holes or cracks exist.
Dirt or scratches interfering with
vision exist.
Lenses do not move freely in tracks.
Visor fails to lock in desired
position.
Mask does not seal properly to face.
1
Clean foam tips as necessary; replace them when they are too soiled to clean.
2
When the CEP does not work, the helmet is still mission capable as long as the earphones are working. However, the CEP
should be replaced as soon as possible.
2-10
Change 3
TM 1-8415-216-12&P
