TM 5-1940-321-13&P
Table 5-1. Scheduled Maintenance Action Index.
Interval
Maintenance Category Maintenance Action
Paragraph Reference
Check pressure of buoyancy tubes and
DR
Unit
keel.
Check tightness of outboard engine
DR
Unit
mounting clap screws.
Check tightness of through transom
DR
Unit
outboard engine mountin bolts.
DR
Unit
Check tightness of transom straps.
Clean craft, flush dirt and sand from
under flooring and from between skirt
VR
Unit
and lower buoyancy tubes.
Clean craft, remove flooring, remove
MR
Unit
dirt and sand under flooring.
S
Unit
Perform pressure retention test.
Clean, inspect, and lubricate
S
Direct
intercommunicating valves.
S
Direct
Clean and inspect keel valve.
Paint transom, paddles, and
A
Direct
thrustboard.
Inspect and CO2 one-way diffuser
S
Unit
valve.
D Daily during periods of craft use.
V After each use of the craft.
M Monthly during periods of craft operation.
S Semiannually.
A Annually
R As specified in procedures.
NOTE: Correct pressure buoyancy tubes is 240-280 mb (3.5-4.1 psi). Correct pressure for the keel
is 220-240 mb (3.2-3.5 psi).