(3)
The lower and upper tripod brace that connects to the tripod apex pin.
B.
To do this procedure, you must remove the upper and the lower tripod assemblies.
TASK 32-21-05-206-001
2. Nose Landing Gear Tripod Brace Assembly Inspection (Fig. 601)
__________________________________________________
A. Standard Tools and Equipment
(1)
Micrometers, inside and outside measuring.
B.
References
(1)
32-21-05/401, Nose Gear Tripod Brace
(2)
IPC 32-21-05 Fig. 1
C.
Access
(1)
Location zone
715 Nose Gear
D.
Procedure
S 026-002
(1)
Do this task: "Removal of the Tripod Brace Assembly on the Nose Landing Gear" (Ref 32-21-05/401).
S 226-003
(2)
Examine the components of the tripod brace assembly on the nose landing gear for worn parts.
(a)
Measure the parts at the locations shown in figure 601.
(b)
Compare the measured dimensions to the wear limits in figure
601.
(c)
If the part is not in tolerance, replace the part if you cannot repair it.
S 426-004
(3) Do this task: "Installation of the Tripod Brace Assembly on the Nose Landing Gear" (Ref 32-21-05/401).
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A
747-400 MAINTENANCE MANUAL
LOCK ACTUATOR
UPPER DRAG STRUT GEAR ACTUATOR
UP AND DOWNLOCK
MECHANISM
RETRACTION ARM
TRUNNIONBUNGEES
LOWER DRAG STRUT
B
A
B
A
BULLNOSE
INSTALLATION
C
C
SHOCK STRUT
FWD
Nose Gear Tripod Brace Wear Limits
Figure 601 (Sheet 1)
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A
747-400
MAINTENANCE MANUAL
A-A
9. BUSHING/BOLT (2 PLACES)
B-B
Nose Gear Tripod Brace Wear Limits Figure 601 (Sheet 2)
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A
747-400
MAINTENANCE MANUAL
C-C
Nose Gear Tripod Brace Wear Limits
Figure 601 (Sheet 3)
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A
747-400
MAINTENANCE MANUAL
INDEX NO. PART NAME DIM. DESIGN LIMITS WEAR LIMITS REPLACE PART WORN REPAIR WORN PART REPAIR INSTR.
DIAMETER WEAR ALLOWED DIM. 16 DIAM CLEAR-ANCE MAX
MIN MAX
1 BUSHING ID 2.5000 2.5030 2.5070 0.0082 2 1
PIN OD 2.4980 2.4990 2.4950 X 1
2 BUSHING ID 2.5000 2.5010 2.5050 0.0062 3 1
PIN OD 2.4980 2.4990 2.4950 X 1
3 BUSHING ID 2.5000 2.5020 2.5060 0.0072 4 1
PIN OD 2.4980 2.4990 2.4950 X 1
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