Table 9-1. Unit Maintenance Preventive Maintenance Checks and Services
Not Fully Mission
a. Inspect twistlocks (1) for damage or
a. Damage is found that
missing parts. Report damage or missing
will impair operation, or any
parts to supervisor.
part is missing.
b. Using 4 mm allen wrench, ensure set-
screw in twistlock handle is tight.
c. Ensure no crack greater than 3/4 inch
c. Twistlock housing or
(19 mm) exists in the welds or the parent
parent material contains a
material of the twistlock housing.
crack greater than 3/4 inch
Inspect for deformed, cracked, or missing
Enough damage is found or
D-rings (2) and cross bars (3).
enough D-rings are missing
so load cannot be properly