TM 3-4240-280-10

2-5. PREVENTIVE MAINTENANCE CHECKS AND SERVICES (PMCS) (CONT)
ITEM TO
NOT FULLY
ITEM CHECK/ MISSION
NO. INTERVAL SERVICE PROCEDURE CAPABLE IF:
5 BEFORE, AIR DUCT a. Be sure air duct hose(1) Air duct hose
WEEKLY HOSE connections (2) are tight connections are
broke.
BEFORE, b. Gently stretch the air duct Air duct hose has
WEEKLY hose by pulling on facepiece holes, tears, cuts or
(3) and M10A1 canister (4) is worn or frayed.
While air duct hose (1) is Wire reinforcement is,
stretched, examine ft for worn broken, crushed, or
or frayed covering; broken or kinked.
crushed wire reinforcement;
kinks that may restrict
breathing when mask is worn;
holes, tears, cuts, dirt, and
mildew. Use brush (item 1,
app D) to clean off dirt and
mildew from air duct hose.
2-38 Change 3