TO 1-1-700 - Robins Air Force Base

TO 1-1-700
MIL-PRF-16173, COMPOUND, CORROSION PREVEN-
TIVE 37
10.16.1 Corrosion Prevention and Control for Lift
Rings. Inspect the lift rings for corrosion/rusting at periodic
inspections. If rusting is not present, reapply a film of MIL-
PRF-16173, Class II, Grade 4 CPC to areas on the lift rings
where the CPC film has worn away. If corrosion/rusting is
noted proceed as follows:
MIL-PRF-85285, COATING, POLYURETHANE, HIGH
SOLIDS 50
c. Solvent wipe the surface of lift rings to remove all
grease, oil, and foreign materials per procedures in
Chapter 3 of TO 1-1-8. Apply one coat of DOD-P-
15328 or MIL-C-8514 Wash Primer on the bare metal;
one coat of MIL-PRF-23377, Type I, Class C Epoxy
Primer or MIL-P-53030 Epoxy Primer; and one coat of
MIL-PRF-85285 Polyurethane Topcoat (color to match)
to the surface of lift rings per procedures in TO 1-1-8
and Chapter 7 of this manual.
A-A-59921/MIL-C-43616, Class 1A, CLEANING COM-
POUND, AIRCRAFT 74
a. Remove all remaining CPC from the tie down rings by
spraying them with A-A-59921/MIL-C-43616, Class
1A, Class 1A solvent emulsion cleaner and wiping the
surface with a cotton cloth per procedures in Chapter 3
of TO 1-1-691.
b. Remove corrosion from remaining hardware with stainless
steel brush or A-A-58054, Type I, Grade C Abrasive
Mat per procedures in Chapter 5 of TO 1-1-691.
DOD-P-15328, PRIMER, PRETREATMENT (WASH) FOR
METALS 16
MIL-C-8514, PRIMER, PRETREATMENT (WASH) FOR
METALS 21
MIL-PRF-23377, TYPE I & II, PRIMER, EPOXY
CHEMICAL AND SOLVENT RESISTANT 38
MIL-P-53030, PRIMER, EPOXY, WATER REDUCIBLE,
LEAD, CHROME FREE 35
MIL-PRF-81733, SEALING AND COATING COMPOUND,
CORROSION INHIBITIVE 48
d. Remove loose fittings for inspection and replace the
bolts only after inspecting the threaded inserts (blind
nuts) for sound threads. Check for spinning blind nuts,
and, if necessary, repair in accordance with Chapter 4 of
TO 35E4-1-162. Apply MIL-PRF-81733, Type II, Class
1, Grade A sealant under bolt heads at installation and
smooth the squeeze-out to a continuous fillet around the
bolt head after the bolt is installed.
10.17 RAZOR EDGE DOORS.
Vans and shelters which house highly sensitive electrical
equipment may have what is called a “Razor Edge” or “Knife
Edge” door. These doors are usually identified by a rubber seal
inserted in the outer edge of the door and a lip extending off
the mating surface of the van or shelter.
10.17.1 This lip is bare of primer and paint with a coating of
cadmium plating extending from the edge back 1/4″ to 1/2″
onto the surface of the lip. The edge mates with the rubber seal
which has metal flakes or particles embedded in it to make a
continually grounded contact.
10.17.2 Cadmium plating is used as a coating to protect
steel parts and to provide a compatible surface when a part is
in contact with other materials. Attack on cadmium is evidenced
by brown to black mottling of the surface or as white
powdery corrosion products. When cadmium shows mottling
and isolated voids or cracks in the coating, the plating is still
performing its protective function and continues to protect the
steel until such time as actual iron rust appears.
10-14 Change 4