(c)
PERF/APU
(d)
CONF/MCDP
(e)
ENG EXCD
(f)
AUTO
(g)
MAN
(h)
REC
(i)
ERASE
E. Put the Airplane Back to Its Usual Condition
S 864-030
(1) Remove electrical power if it is not necessary (AMM 24-22-00/201).
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757 MAINTENANCE MANUAL
ALTITUDE PRESSURE SWITCH - REMOVAL/INSTALLATION
_______________________________________________
1. General_______
A. There is one altitude pressure switch, S10618. These procedures give instructions for removal, installation, and a check of the altitude pressure switch.
TASK 31-41-08-004-001
2. Altitude Pressure Switch Removal________________________________
A. Access
(1) Location Zones
119 Main Equipment Center
B. Procedure
S 034-003
(1) Loosen the two larger mounting clamp screws adjacent to the switch.
S 024-004
CAUTION:_______CAREFULLY MOVE THE SWITCH OUT OF THE BRACKET. THIS WILL PREVENT DAMAGE TO THE CABLE AND THE PNEUMATIC HOSE AT THE BACK OF THE SWITCH.
(2)
Move the switch out of the bracket.
S 034-005
(3)
Disconnect the electrical cable.
S 034-006
CAUTION: MAKE SURE THE PITOT-STATIC SYSTEM IS AT AMBIENT PRESSURE
_______ BEFORE YOU DISCONNECT THE PNEUMATIC HOSE. THIS WILL PREVENT DAMAGE TO THE INSTRUMENTS.
(4) Use the quick disconnect to disconnect the static pressure hose.
TASK 31-41-08-404-007
3. Altitude Pressure Switch Installation_____________________________________
A. General
(1) You do not have to do a leak test when you connect a quick-disconnect fitting. A visual examination of the quick-disconnect for a complete seal is necessary. You must do a leak test when you cannot make sure that the quick-disconnect has a complete seal.
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MAINTENANCE MANUAL
B. References
(1) AMM 34-11-00/501, Pitot-Static System
C. Access
(1) Location Zones
119 Main Equipment Center
D. Procedure
S 434-008
(1)
If the new switch does not have a quick-disconnect installed on it, remove the quick-disconnect from the old switch.
S 434-009
(2)
Inspect the O-ring for damage and replace if necessary.
