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DRAIN DISCS APL NOSE UP APL NOSE DN
PREVENTSCW
APL NOSE UP
BACK-DRIVE APL NOSEDN BRAKERETURNAPL NOSE DN HYD
HYD MOTOR
MOTOR CASE DRAIN BRAKERELEASE
MOTOR
STAB TRIM"ARM""ARM"
ARM LEVERAPL NOSE APL NOSE
INPUT ROD
APL NOSE UP
DN SOL UP SOL (SH 1)F E(SH 1)
"CONTROL" VALVE
APL NOSE UP APL NOSE DN(SH 1) LEFT STABILIZER TRIM CONTROL MODULE "CONTROL"
"CONTROL"(SH 1) B
A
INTERNALS SAME AS LEFT STABILIZER
APL NOSE DN SOL APL NOSE UP SOL
DC
RIGHT STAB TRIM(SH 1) (SH 1) TRIM CONTROL MODULE
BRAKEPRESSURE SW
SHUTOFF VALVERIGHT
ELEVPRESS
RETURNSTAB TRIM
FEEL CONT LEVERTRIMSTAB.
DC
SYSTEM PRESSURE

CONTMODULE "CONTROL""CONTROL"ELEV FEEL CMPTRAPL NOSEAPL NOSE
RETURN
INPUT ROD  RIGHT HYD SYSTEM
DN SOL UP SOL
(SH1) (SH1)METERED PRESSURE
Horizontal Stabilizer Trim System Schematic
Figure 7 (Sheet 2)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH STAB TRIM LEVERS ON THE ú

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757
MAINTENANCE MANUAL

28V DC CUTOUT
1 INTERNALS
STBY

CLOSE
SAME AS LEFTBUS
SIDE OPPOSITE
A
EQUIPMENT
R STBY TRIM

SHUTOFF NORMAL
FLAPS
L STAB TRIM

UP CAPT INBD AFT OPEN
STAB í15.3STAB C/O SW
SHUTOFF SWUNITS STAB TRIM
1200/1700 PSI INDICATION
SHUTOFF VALVEP GND WHEN
MANUAL ELEC CAPT INBD FWD FLAPS
PB
TRIM
STAB .3.00
28V DC

STAB C/O SWNOT UP
ELEC HYD PUMP FLAPS UNITS & 1000 PSI
R SYS PRESS SW FLAPS/SLATS NOT UP
L
FLAPS UP
BUS

MACH TRIM BRAKE PRESS. SW
ELEC UNIT 1
L TRIM LIMIT
L STAB

CAPT OUTBD AFT SELECT RELAY
C
SHT
AUTO TRIM
NOSE UP STAB C/O SW
TRIM CONTROL AC
4
STAB .0.2
AIRPLANE NOSENOSE DOWN
UNITS & FLAPS
MONITOR UP "CONTROL" SOL
NOT UP CAPT OUTBD FWD
D STAB C/O SW
TRAVEL LIMIT SW'S
CAPT STAB TRIM

AA
CONTROL WHEEL SW

AIRPLANE NOSEL STAB TRIM/ELEV
RVDT
DN "CONTROL" SOLASYM LIMITERMOD (SAM)
E
STAB TRIM POSITION
28V DC

AAINDICATING SYSTEM
NOSE DOWN AIRPLANE NOSE
BATTERYAB AG AE
UP "ARM" SOLAC
CX
BUS NOSE UP
ALT
F
SYNCHRO
AD
STAB TRIM
AE

STAB IN/OUT
TAKEOFFGREENBAND RANGE L STAB TRIM LIMIT
NOSE DOWNAIRPLANE NOSE
WARNING SW & POSN XMTR MOD
AFDOWN "ARM" SOL
GREENBAND SWITCH AND AG
ANNUN  L STAB TRIM CONT MOD
NOSE UP
C STAB TRIM LIMIT
NOSE DOWN

AH SW & POSN XMTR MOD UNSCHED STAB TRIM (Y)
STAB TRIM POSITIONSTAB TRIM (W,Y)NOSE UP
INDICATING SYSTEM
1  L EICAS COMPUTER
F/O OUTBD AFT  AH
ALTERNATE
STAB C/O SWAF
STAB TRIM SWITCH
AA
(P10 QUADRANT STAND)
1 MD&T F/O OUTBD FWD1
1
STAB C/O SWSTAB TRIM LIGHT
1
28V DC
1
F/O STAB TRIM
1
R

1
CONTROL WHEEL SW
BUS

A
F/O INBD AFT
AA
FLAP/SLATSTAB C/O SW
R STABELEC UNIT 3
B
TRIM CONTROL

1
R STAB TRIM1
LIMIT SW & CR SAM
1
AD SHT UNSCHED STAB
POSN XMTR
28V DC

C HYD SYS R TRIM
4 TRIM LIGHTLIMIT
F/O INBD FWD  MOD D
PRESSURE SW AB
STBY

STAB C/O SW SELECT EMISC ANNUNCIATOR PNL
BUS
1 RELAY
L STBY TRIM

F
1
SHUTOFF

R STAB TRIM R STAB TRIMP11 PNL SHUTOFF SW CONT MOD R EICAS COMPUTER
Horizontal Stabilizer Trim System Schematic
Figure 7 (Sheet 3)

EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH ALTERNATE STAB TRIM ú

 27-41-00
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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