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A
747-400 FAULT ISOLATION/MAINT MANUAL
UPPER PRIMARY LOCK DRAG STRUT
SENSOR, (S397) (REF)
NOSE GEAR ALTERNATE
LOCK SENSOR LOCK
SEE I SENSOR, (S424)
SHIM
NOSE LANDING GEAR (REF)
NOSE GEAR SQUAT SENSOR
SEE J NOSE WHEEL WELL AFT BULKHEAD
FWD NOSE LANDING GEAR SEE K
H FROM SHT 1
NOSE GEAR LOCK SENSOR
I
AFT BULKHEAD NOSE WHEEL WELL (REF) FWDPRIMARY SQUAT SENSOR, S800 (ON RIGHT SIDE OF MOUNTING BRACKET)
FWD PRIMARY UP SENSOR,
ALTERNATE (S396)
SQUAT SENSOR, S801 (ON LEFT SIDE OF MOUNTING BRACKET) ALTERNATE UP
SENSOR, NOSE GEAR SQUAT SENSOR (S411)
NOSE WHEEL WELL AFT BULKHEAD
J K
Landing Gear Indication System - Component Location Figure 102 (Sheet 3)
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747-400
FAULT ISOLATION/MAINT MANUAL
WING GEAR
WHEEL WELL
INBOARD
WING GEAR WHEEL WELL DOOR (REF)
FORWARD BULKHEAD
SEE L FORWARD
BULKHEAD
(REF)
LH, RH,
ALTERNATE DOOR LH, RH,
WARNING SENSOR PRIMARY DOOR
(S395,S426) WARNING SENSOR
(S407,S410)
WING GEAR WHEEL WELL FORWARD BULKHEAD
L
BODY GEAR LH, RH, PRIMARY
DOWNLOCK DOWNLOCK SENSOR
SENSOR (S399,S405)
SEE N
LH, RH, ALTERNATE
DOWNLOCK SENSOR
(S415,S412)
UPPER JURY
STRUT (REF)
WING GEAR
UPPER TORSION LINK INBD FWD
SEE O SHT 5
LOWER JURY
INBD FWD STRUT (REF)
WING LANDING GEAR WING GEAR DOWNLOCK SENSOR
M FROM SHT 1 N
Landing Gear Indication System - Component Location
Figure 102 (Sheet 4)
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747-400 FAULT ISOLATION/MAINT MANUAL
WING GEAR UPLOCK MECHANISM
SEE Q
WING GEAR TRUCK
TILT SENSOR
(ALTERNATE S615 LEFT,
S614 RIGHT)
(PRIMARY S417 LEFT,
S416 RIGHT)
UPPER TORSION
LINK (REF)
FWD
WING GEAR
WING GEAR UPPER TORSION LINK P FROM SHT 1
O
S404 RIGHT) (PRIMARY S398 LEFT, S1639 RIGHT) (ALTERNATE S1638 LEFT, UPLOCK SENSORS FWD
UPLOCK HOOK (REF)
WING GEAR UPLOCK MECHANISM
Q
Landing Gear Indication System - Component Location
Figure 102 (Sheet 5)
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D20442
A
747-400 MAINTENANCE MANUAL
LANDING GEAR POSITION INDICATION SYSTEM - ADJUSTMENT/TEST
_________________________________________________________
1. General_______
A. This procedure contains six tasks:
(1) Ground Test of the Landing Gear Systems in the PSEU
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