TM 55-1670-251-20&P/TO 13D3-2-2
Table 2-1. Preventive Maintenance Checks and Services
Key: X-After Use
Y-Prior to Use
Z-Periodic (6 month) Inspection
Determine that all components are present for use
Kit packed for use
Check for holes, dents, damage to seal and grit between
seal and mating surface. Check sling suspension points
for wear and damage, latches and strikes for freedom
of action. Check inspection record for last date of
Check for evidence of fraying and abrasion of canopy,
shroud lines and riser lines. Examine hook swivel for
freedom of action. Check for dampness, fungus acid,
grease, oil, dirt, foreign material, holes, cuts, tears,
and broken lines and webbing.
dampness, fungus, dirt, acid, grease, oil, foreign
material, rips, burns, cuts, frays, tears, holes, thin
spots, loose weaving and loose or broken stitching, lines
Check for corrosion, rough spots, burrs, breaks, cracks,
bends, and missing or worn tie chord, clevis pin or
(1.) Swivel assemblies either be smooth-
for example, lifting grips for wear and damage.
ed down and/or remove any casting flash by grin-
Check latches and strikes for freedom of
ding or filing, or tape over the metal portion that
contacts the webbing with appropriate tape.
(2.) Overstitch the zig zag stitch pattern
Inspect for cuts, frays, oil or grease stains and
with a three point WW Stitch Pattern using size FF
rust at points of contact with metal. Remove
grease or oil by spot cleaning with dry cleaning
b. Gust Lock Assembly. Inspect for pin
solvent (tetrachlorethylene), NSN 6850-00-264-
wear and general deformation. Straighten as
9039. Replace as required.
required. Check the shock bungee chord assem-
blies for cuts and abrasion. Replace as required.
The load stabilizers of the aerial recovery kit are
c. Spoiler Assembly. Check the assemblies
for evidence of fraying and abrasion of nylon
are as follows:
straps and the integrity of their attachment to
a. Drogue Chutes. There are two types of
the spoilers. A reduction of 50% in section area
drogue chutes, 156 inches and 60 inches diameter
of one strap or the loss of one rivet per attach-
when inflated, item (1) and (2), respectively.
ment necessitates the repair or replacement of
The drogue chutes if wet should be suspended and
the strap assembly. Check the rubber to aluminum
allowed to dry after use. When dry shake and
bond and rebond if required using adhesive liquid
brush to remove grit. Check for evidence of fray-
FED-MM-A-139. Straighten spoiler angles.
ing and abrasion of canopy, shroud lines, and riser
Replace when beyond economical repair.
lines. Examine hook swivel for freedom of opera-
The maximum amount of wear which can be
The sling assemblies of the aerial recov-
tolerated before replacement of the chute assembly
is defined in TM 10-1670-201-23.
a.1. Drogue chutes manufactured before
June 1980. Inspect and repair as follows:
a. Anchor Positioning Straps. Inspect