(b)
Compare the measured dimensions to the wear limits in Figure 601.
(c)
If a part is not in tolerance, replace the part if you cannot repair it.
S 226-003
(5)
Examine the fit of the retract actuator connection.
(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 a part is not in tolerance, replace the part if you cannot repair it.
S 426-004
(6)
Do this task: "Nose Landing Gear Installation" (AMM 32-21-01/401).
S 426-007
(7)
Connect the retract actuator to the trunnion clevis.
TASK 32-21-01-216-009
3. Nose Landing Gear External Inspection (Fig. 601)
_____________________________________
NOTE: This is a Scheduled Maintenance task.
____
A. Access
(1) Location Zone
715 Nose Landing Gear
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
TRUNNION CLEVIS
TRUNNION BEARING (2)
A B
A
DRAG STRUT
B
TRIPOD
BRACE ASSEMBLY
LEFT DRAG
1 BRACE
ACTUATOR ROD
SHOCK 4. BEARING/ WASHER STRUTBULLNOSE BOLT 1. BUSHING/ASSEMBLY TRUNNION BOLT
CLEVIS
BOLT
6. PIN/BUSHING
5. BUSHING/BUSHING
SUPPORT
FITTING
8. BEARING
WASHER
CAP BOLT
2.
BUSHING/BEARING
3.
BOLT/BUSHING
TRUNNION 3A. BOLT/BUSHING
PIN
A-A
SUPPORT
FITTING
OUTER CAP
CYLINDER
7. BUSHING/PIN 1 REFER TO 32-21-05/601 FOR THE
SIDE BRACE INSPECTION/CHECK ON THE TRIPOD BRACE ASSEMBLY
B-B
Wear Limits for the Nose Landing Gear
Figure 601 (Sheet 1)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
NO. INDEX PART NAME DIM. DESIGN LIMITS WEAR LIMITS WORN PART REPLACE PART WORN REPAIR REPAIR INSTR
DIAMETER PER-MITTED WEAR DIM.16 ANCE CLEAR-MAX DIA
MIN MAX
1 BUSHING ID 1.3750 1.3760 1.3794 0.054 X 43
BOLT OD 1.3730 1.3740 1.3706 X 2
2 BUSHINGS 5 1.630 1.638 1.656 0.026 X 43
BEARING 6 1.625 1.630 1.612 7
3 BOLT 8 3.844 3.854 11 0.090 10 2
BUSHINGS 9 3.801 3.820 11 10 4
4 BEARING ID 1.3745 1.3750 1.3774 0.0044 7
BOLT OD 1.3730 1.3740 1.3706 X 2
5 BUSHING 17 41.5030 41.520 41.5250 0.0370 X 14
BUSHING 13 41.4930 41.503 41.4880 X 2
6 PIN 15 49.9790 50.0236 50.0286 0.0556 X 2
BUSHING 12 49.9570 49.9780 49.9730 X 14
7 BUSHING ID 4.0000 4.0020 4.0060 0.0080 X 14
PIN OD 3.9980 3.9990 3.9940 X 2
Wear Limits For the Nose Landing Gear
Figure 601 (Sheet 2)
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