S 348-028
(22)
Connect a vacuum pump to the plastic sheet and secure it with tape.
S 348-026
(23)
Operate the vacuum pump so that pressure on the repair area is equal to 22 inches of mercury.
NOTE: You can stop the vacuum pump when the air bubbles no
____
longer appear at the repair.
S 348-030
(24) Let the patch stay without movement for 14 hours at 70 degrees F. or 65 (+/- 5) minutes at 150 (+/- 5) degrees F.
NOTE: The patch is serviceable when it is hard.
____
S 348-029
(25)
Remove the plastic sheet from the repair area.
S 348-023
(26)
Remove the parting film from the patch after it stays without movement at the specified conditions.
S 348-024
(27)
Make sure that the patch is free from pits, blisters, areas without adhesive, and unwanted adhesive resin material.
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A
737-300/400/500MAINTENANCE MANUAL
TURBOFAN - UNIT SERVICING
_________________________
1. General
_______
A. This procedure replaces the oil in the turbofan.
TASK 21-52-61-613-001
2. Replace the Turbofan Oil (Fig. 301)
________________________
A. Consumable Materials
(1)
Oil - Turbofan, Approved by AiResearch Manufacturing Company, 9851-9951 Sepulveda Boulevard, Los Angeles, California 90009
(2)
Lockwire, Military Standard MS20995C32, ASG
B. Access
(1)
Location Zones
214 Left Air Conditioning Equipment Bay
212 Right Air Conditioning Equipment Bay
(2)
Access Panels
3303 Left A/C Access Panel
3403 Right A/C Access Panel
C. Prepare to Replace the Turbofan Oil
S 013-002
(1) Open the necessary access panel 3303 or 3404.
D. Drain the Used Oil
S 683-006
(1) Do these steps to drain the used oil:
(a)
Position the correct container under the turbofan drain to catch the oil.
(b)
Remove the lockwire from the drain plug.
(c)
Remove the drain plug from the turbofan.
NOTE: There are two electrical wires found on the drain
____ plug boss. Make sure you do not cause damage to the wires when you remove the drain plug.
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A 737-300/400/500MAINTENANCE MANUAL
SEE A
SEE B
A
TURBINE AIR DUCT
SEE TURBOFAN C HOLE OVERFLOW DIP STICK TURBOFAN
FWD INBD B FWD C DRAIN PLUG PACKING FLEXIBLE DUCT
Ram Air System Turbofan - Servicing
Figure 301
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L82700
A
737-300/400/500MAINTENANCE MANUAL
(d) Drain the oil into the correct container.
E. Install the Drain Plug
S 423-013
(1) Do these steps to install the drain plug:
(a)
Install the drain plug with a serviceable packing.
(b)
Install a lockwire to secure the drain plug.
NOTE: Refer to Military Standard MS33540.
____
F. Replace the Oil
S 613-009
(1) Do these steps to replace the oil:
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