S 034-030
(3)
Remove the bolts (6), nuts (8), and washers (7) which connect the actuator (1) to the airframe bracket and to the actuator arm.
(4)
Remove the actuator (1).
S 024-029
TASK 21-62-05-404-004
3. Ram Air Exit Door Actuator Installation (Fig. 401)_______________________________________
A. Equipment
(1) Bonding Meter
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A
747-400
MAINTENANCE MANUAL
B. Consumable Materials
(1)
B00192 Solvent, BMS 3-2, type 1
(2)
G00378 Alodine
(3)
G00033 Lint-free cheesecloth
C. Parts
~.............................................................................. | MM | | IPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 1 |Actuator | 21-51-73 | 01 | 60 | | | 2 |Washer | | | 30 | | | 3 |Nut | | | 35 | | | 4 |Bolt | | | 20 | | | 5 |Bonding Jumper | | | 15 | | | 6 |Bolt | | | 45 | | | 7 |Washer | | | 50 | | | 8 |Nut | | | 55 | 2......…........…...................................…..........….....….........1
D. References
(1)
06-09-03/201, Body Section 44 Access Doors and Panels
(2)
AMM 20-11-14/701, Metal Surfaces - Cleaning/Painting
(3)
AMM 20-22-01/601, Electrical Bonding
(4)
AMM 21-51-00/501, Air Conditioning Pack System
(5)
AMM 21-62-12/401, Ram Air Exit Door Limit Switch
(6)
AMM 24-22-00/201, Manual Control
E. Access
(1)
Location Zone
133 Air Conditioning Equipment Bay, LH
134 Air Conditinging Equipment Bay, RH
(2)
Acces Panel
191EL Air Conditioning (Pack 1)
191ML Air Conditioning (Pack 2)
192ER Air Conditioning (Pack 3)
F. Install the Actuator.
S 424-031
(1) Put the actuator (1) in its position on the airframe bracket.
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747-400 MAINTENANCE MANUAL
S 434-032
(2) Install the bolt (6), washer (7) and nut (8) to connect the actuator
(1) to the airframe bracket.
NOTE: Do not connect the actuator pushrod to the actuator arm at
____
this time.
S 434-033
(3) To connect the bonding jumper to the actuator, do these steps:
(a) Use the solvent and the cheesecloth to clean and dry the bonding surfaces (AMM 20-11-14/701).
NOTE: The bonding surfaces must be clean and dry to
____ provide a good electrical ground path.
(b)
Connect the bonding jumper (5) to the actuator lug with the bolt (4), washer (2), and nut (3).
(c)
Use the bonding meter to measure the resistance between the bonding jumper terminal and the actuator near the bonding jumper connection. (AMM 20-22-01/601).
NOTE: If necessary, you can remove a small area of the
____ surface finish to make the measurement.
(d)
If the resistance is greater than 0.0025 ohms, then disassemble the bonding jumper connection, repeat the cleaning and assembly steps, and measure the resistance again.
(e)
If you removed any of the surface finish from the actuator, then use the alodine to repair the surface finish.
S 434-034
(4)
Connect the electrical connector (9) to the actuator (1):
-DV156 for the pack 1 actuator
-DV157 for the pack 2 actuator
-DV158 for the pack 3 actuator.
(5)
Retract the actuator pushrod if it is not fully retracted:
S 864-035
NOTE: The actuator pushrod must be fully retracted before you
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