S 865-057
(9)
Close the window in the flight compartment.
TASK 21-31-00-715-059
6. Automatic Rate Check____________________
A. References
(1)
AMM 21-00-00/201, Air Conditioning
(2)
AMM 24-22-00/201, Electrical Power
B. Access
(1) Location Zone
101 Left Control Cabin
102 Right Control Cabin
C. Prepare for the test
S 865-060
(1)
Supply electrical power (AMM 24-22-00/201).
S 865-061
(2)
Make sure that these circuit breakers on the P6 panel are closed.
(a)
AUTOMATIC AC and DC
(b)
STBY AC and DC
(c)
MAN AC and DC
D. Procedure
S 865-062
(1)
Start and operate the air conditioning packs in MANUAL-COLD (AMM 21-00-00/201).
S 865-063
(2)
Set the mode selector to AUTO.
(3)
Set the FLT/GRD switch to FLT.
S 715-065
(4)
Make sure that CABIN CLIMB becomes stable at 250 to 450 SL FEET PER MIN down before CABIN CLIMB stays near zero.
(5)
Set the FLT/GRD switch to GRD.
S 715-067
(6)
Make sure that CABIN CLIMB becomes stable at 300 to 600 SL FEET PER MIN up before it stays near zero.
S 865-064
S 865-066
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A
737-300/400/500MAINTENANCE MANUAL
S 865-068
(7) Put the airplane back to its usual condition.
TASK 21-31-00-725-069
7. Pressurization Outflow Valve Resistance Tests
_____________________________________________
A. References
(1) AMM 21-31-11/401, Cabin Pressurization Outflow Valve
B. Access
(1) Location Zone
220 Aft Cargo Compartment Equipment Bay
C. Procedure
S 025-070
(1)
Remove the outflow valve (AMM 21-31-11/401).
S 765-071
(2)
At connector D950, make sure that the resistance between pins 6 and 7 is 21 |3 ohms.
NOTE: This step measures the resistance of the AC clutch.
____
S 765-072
(3) At connector D950, make sure that the resistance between pins 8 and 11 is 10 |1.5 K-ohms.
NOTE: This step measures the resistance of the valve feedback
____
potentiometer.
S 765-073
(4) At connector D952, make sure that the resistance between pins 6 and 7 is 21 |3 ohms.
NOTE: This step measures the resistance of the DC clutches.
____
S 765-074
(5) At connector D952, make sure that the resistance between pins 8 and 11 is 10 |1.5 K-ohms.
NOTE: This step measures the resistance of the valve feedback
____
potentiometer.
S 425-075
(6) Install the outflow valve (AMM 21-31-11/401).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
CABIN PRESSURIZATION OUTFLOW VALVE - REMOVAL/INSTALLATION
_________________________________________________________
1. General_______
A. You can remove and install the outflow valve for the cabin pressurization from the outer side of the airplane.
B. The valve is below the fuselage near the aft entry door.
TASK 21-31-11-004-001
2. Remove the Outflow Valve for the Cabin Pressurization (Fig. 401)_____________________________________________________
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