SUBTASK 53-11-37-610-017
(5) The corrosion inhibiting compound, G00009 should not be used in the vicinity of oxygen
system components. The suggested protection system for areas near oxygen system
components is as follows:
(a) Clean corrosion and repair affected area per the SRM 737-678.
(b) Chemical treat bare aluminum surfaces.
(c) Apply one coat of green primer, C00259 Type 1.
(d) Apply one coat of yellow primer, C00259 type 1.
(e) Apply coating, C00260, type 2 epoxy or coating, C00032 polyurethane enamel top coat.
SUBTASK 53-11-37-610-018
(6) Prevention Treatment
(a) At first opportunity when scheduled maintenance work allows access to the structure,
corrosion prevention treatment should be accomplished.
(b) Remove sidewall lining and insulation blankets in the cargo compartment and beneath
the upper lobe entry and cargo doors to expose frame, stringer, doublers and skin.
(c) Remove floor panels to gain access to bilge areas, if required.
(d) Remove ceiling lining for access to main deck floor beams and intercostals.
(e) Open plugged drains.
(f) Make sure that all drain paths are clear at the frames and stringers in the airframe lower
lobe and stringer ends at station bulkhead.
(g) Replace broken or damaged finishes. Refer to STANDARD PREVENTIVE
MAINTENANCE PROCEDURES, SUBJECT 51-00-59 for protective finish systems.
(h) Apply a coat of primer, C00259 primer to the inboard flange surfaces of stringers and
allow to dry thoroughly.
(i) Replace or repair broken or damaged leveling compounds used for drainage.
(j) The chromate-loaded sealant, A00247, class F,is applied to the inboard flanges and to
portions of the frames that come in contact with insulation blankets. Allow to cure for 48
hours. Note condition of the sealant and reapply as necessary.
(k) Apply corrosion inhibiting compound to all exposed structure under the cargo floor and to
the sidewalls beneath the upper lobe entry and cargo doors. The use of spray equipment
with nozzle directed into faying surfaces is recommended. Do not apply excessively.
NOTE: To reduce the possibility of moisture entrapment between insulation blankets and
airplane skins in the bilge area, supports for the insulation blankets were
provided. These supports consist of nylon twine and brackets. Earlier installations
utilizing silicone rubber loops may deteriorate because of exposure to
hydrocarbons such as corrosion inhibitors and should be replaced with the nylon
twine.
(l) Allow solvent to evaporate before reinstalling insulation blankets.
(m) Install blankets so they are taut and so that the outboard surfaces of the upper blanket
overlap the lower blanket.
(n) Install liners and floor panels. Install the floor panel fasteners with grease, D00633.
SUBTASK 53-11-37-610-019
(7) Frequency of Application
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
53-11-37
Page 208
D633A101-ILF Oct 15/2017
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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