G. Prepare for the Installation
SUBTASK 47-32-01-430-001
(1) Do these steps to prepare the NGS shutoff valve [1] for the installation:
(a) Make sure that the lockpin [8] is stowed in the servo housing, and fully tightened.
(b) Make sure that the visual position indicator points to the CLOSED position.
SUBTASK 47-32-01-010-001
(2) Go to the NGS shutoff valve [1] location in the left air conditioning bay.
SUBTASK 47-32-01-090-001
(3) Remove the protective covers from the ozone converter [6] and the bleed air inlet duct [2].
SUBTASK 47-32-01-100-001
(4) Make sure that the NGS shutoff valve [1], ozone converter [6], seal [3], coupling [4], and
coupling [5] are clean, free from grease and unwanted materials.
SUBTASK 47-32-01-110-001
(5) To clean the components, do this task: General Cleaning of Metal (Series 80),
TASK 20-30-80-910-801.
SUBTASK 47-32-01-110-002
(6) Prepare these components for an electrical faying surface bond (SWPM 20-20-00):
(a) mating surfaces of the NGS shutoff valve [1]
(b) mating surfaces of the coupling [4]
(c) mating surfaces of the coupling [5]
(d) mating surfaces of the ozone converter [6]
(e) mating surfaces of the bleed air inlet duct [2].
SUBTASK 47-32-01-390-001
WARNING
KRYTOX 240AC IS AN AGENT THAT IS POISONOUS AND AN IRRITANT.
MAKE SURE ALL PERSONS OBEY THE PRECAUTIONS WHEN KRYTOX
240AC IS USED.
• DO NOT USE IN AREAS WHERE THERE IS HIGH HEAT, SPARKS, OR
FLAMES.
• CLOSE THE CONTAINER WHEN NOT USED.
• DO NOT GET KRYTOX 240AC IN THE EYES, ON THE SKIN, OR ON YOUR
CLOTHES.
• DO NOT BREATHE THE GAS.
• DO NOT EAT KRYTOX 240AC.
(7) Apply a thin layer of Krytox 240AC perfluoropolyether grease, D50063, or water, on the
seal [3].
SUBTASK 47-32-01-430-002
(8) Install the seal [3] in the cavity of the NGS shutoff valve [1] and the ozone converter [6].
H. Install the NGS Shutoff Valve
SUBTASK 47-32-01-420-001
(1) Do these steps to install the NGS shutoff valve [1]:
(a) Align the NGS shutoff valve [1] with the bleed air inlet duct [2].
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
47-32-01
Page 407
D633A101-ILF Oct 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
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