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757
MAINTENANCE MANUAL
4. DC MOTOR
ELECTRICAL
CONNECTOR
3. ACTUATOR
5. POTENTIOMETER
2. AC MOTORS ELECTRICAL
CONNECTOR
1. AC MOTORS
ELECTRICAL 6. DC MOTOR AND
CABIN PRESSURE CONNECTORS POTENTIOMETER
OUTFLOW VALVE
ACTUATOR A 7. ACTUATOR
SEE A SUPPORT
FRAME
8. ACTUATOR BOLT
A (2 LOCATIONS) 9. WASHER
10. BOLT
(SEE A-A)
INBD FWD
CABIN PRESSURE OUTFLOW VALVE ACTUATOR
2. AC MOTORS
A
15. ACTUATOR ARM
2` (REF)
8.
ACTUATOR BOLT
9.
WASHER (2 LOCATIONS)
17. CONNECTING ROD
7. ACTUATOR SUPPORT
FRAME16. ACTUATOR 10. BOLT
DRIVE SHAFT
12.
WASHER
13.
NUT
14.
PIN
THE ANGLE IS MEASURED BETWEEN THE PLANE
THROUGH THE ACTUATOR BOLT CENTERLINES
A-A
AND THE DOWN SLOPE OF THE CENTERLINE
OF THE ACTUATOR ARM (VALVE FULLY CLOSED)
Cabin Pressure Outflow Valve Actuator Installation
Figure 401
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757 MAINTENANCE MANUAL
S 864-005
WARNING: IF YOU USE THE ACCESS THROUGH THE CABIN PRESSURE OUTFLOW VALVE,
_______ MAKE SURE THE ELECTRICAL POWER IS OFF, THE CIRCUIT BREAKERS ARE OPEN, AND THE DO-NOT-CLOSE TAGS ARE ATTACHED. IF ELECTRICAL POWER IS SUPPLIED TO THE VALVE WHEN IT IS IN THE FULLY OPEN POSITION, THE VALVE WILL MOVE TO THE NOT FULLY OPEN POSITION. THE MOVEMENT OF THE VALVE CAN CAUSE INJURY TO PERSONS.
(3)
Remove the electrical power (AMM 24-22-00/201).
S 864-004
(4)
Open these circuit breakers on the overhead circuit breaker panel, P11, and attach DO-NOT-CLOSE tags:
(a)
11B14, CABIN ALTITUDE CONTROL MANUAL
(b)
11B15, CABIN ALTITUDE CONTROL SELECT
(c)
11N15, CABIN ALTITUDE CONTROL AUTO 1
(d)
11N24, CABIN ALTITUDE CONTROL AUTO 2
S 034-005
(5)
Disconnect the electrical connectors (1, 4) on the manual DC and auto AC motors (6, 2).
(a)
Put a tag on the AC motor electrical connectors (1) to identify them for installation.
S 034-006
(6)
Disconnect the electrical connector (5) from the potentiometer (6).
S 034-007
(7)
Remove the bolt (10), washer (12), nut (13), and pin (14) that connect the actuator arm (15) to the connecting rod (17).
(8)
Remove the actuator bolts (8) and the actuator (3).
S 024-008
TASK 21-31-04-404-009
3. Install the Cabin Pressure Outflow Valve Actuator (Fig. 401)
_________________________________________________
A. Parts
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MAINTENANCE MANUAL
~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT |FIG | ITEM | ................................................................................ | 401 | 3 | Actuator | 21-31-03 | 01 | 40 | | | 8 | Actuator Bolt | | | 45 | | | 9 | Washer | | | 55 | | | 10 | Bolt | | | 35 | | | 12 | Washer | | | 37 | | | 13 | Nut | | | 38 | | | 14 | Pin | | | 33 | 2......…........…...................................…...........….....…........1
B. References
(1)
AMM 06-46-00/201, Entry, Service and Cargo Doors Access Doors and Panels
