(2)
Digital Multimeter, High Impedance (alternative)
NOTE: The digital multimeter must be specifically selected to
____ minimize self-heating of the sensor element. The instrument must limit the current through the sensor to less than 100 microamperes. If you use resistance measuring instruments without this current-limiting feature you will get an error in the resistance value due to self-heating of the sensor element.
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A
737-300/400/500MAINTENANCE MANUAL
RAM AIR DUCT
ACCESS DOOR
RAM AIR
INLET
RAM AIR EXIT
SEE A
A
FWD
A
RAM AIR EXIT A
RAM AIR EXHAUST LOUVERS
0.65-1.00 INCH
A-A
Ram Air Actuator Temperature Controller - Adjustment Figure 501
G91122
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C.
D.
E.
A
737-300/400/500MAINTENANCE MANUAL
(3)
Digital Multimeter, Hewlett Packard Model 3465A (alternative)
(4)
Thermometer (capable of measuring temperature in °F to an accuracy
of plus or minus 1°F from -40 to 140°F)References
(1)
AMM 12-13-61/301, Turbofan Servicing
(2)
AMM 20-10-27/201, Maintenance Practices
(3)
AMM 21-52-12/401, Ram Air Temperature Controller
(4)
AMM 24-22-00/201, Manual Control
(5)
AMM 36-05-00/201, Pressurize/Depressurize Pneumatic SystemAccess
(1)
Location Zones 101, 102 Control Cabin 211 Left Ram Air Duct 212 Left Air Conditioning Equipment Bay 213 Right Ram Air Duct 214 Right Air Conditioning Equipment Bay
(2)
Access Panels 3303L Air Conditioning Access Panel 3403R Air Conditioning Access Panel
Prepare to Do a Test of the Ram Air System
S 015-025
(1)
Open the left and right bay doors to the air conditioning equipment.
S 615-026
(2)
Do a check of the turbofan oil level for the left and right turbofans (AMM 12-13-61/301).
S 865-027
(3)
Supply electrical power (AMM 24-22-00/201).
S 865-028
(4)
Make sure these circuit breakers on the P6 panel are closed:
(a)
L and R TURBOFAN
(b)
L and R RAM MOD
(c)
OVERHEAT
(d)
BEJ 061, 062 PRE-SB 21-1102;
RAM MOD CONT
(e)
MASTER CAUTION (all except FUEL, if installed)
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737-300/400/500MAINTENANCE MANUAL
(f)
INDICATORS LTS, MASTER DIM BUS (9 locations)
(g)
DIM & TEST (1 location)
F. Do the Test
S 865-030
(1)
Lower the wing flaps to a position that is not fully retracted.
S 865-031
(2)
Set the L and R PACK switches to OFF on the P5-10 panel.
S 715-174
(3)
Make sure that the left and right turbofan valves are closed and that the turbofans are not running.
S 725-044 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：737-300 400 500 AMM 飞机维护手册 空调 AIR CONDITIONING 2(48)
