(2)
IPC 27-51-24, Fig. 1
C.
Access
(1)
Location Zone 563 Outboard Flap Track Fairing, Inboard Flap, LH (Track No. 3) 561 Inboard Flap Track Fairing, Inboard Flap, LH (Track No. 4) 661 Inboard Flap Track Fairing, Inboard Flap, RH (Track No. 5)
663 Outboard Flap Track Fairing, Inboard Flap, RH (Track No. 6)
D. Procedure
S 026-002
(1)
Remove the inboard foreflap carriage and toggle (AMM 27-51-24/401).
S 226-003
(2)
Examine the bearings, bolts and rollers on the inboard foreflap carriage and toggle for worn areas:
(a)
Remove the parts to be examined.
(b)
Measure the parts.
NOTE: Use a micrometer or a vernier caliper.
____
(c) Compare the dimensions you measured, with the permitted dimensions shown in Fig. 601.
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A
747-400 MAINTENANCE MANUAL
(d)
Replace the parts which are not in the tolerance.
(e)
Replace a roller if it has a flat worn area wider than
0.32 inch (8.1 millimeters).
NOTE: Measure chord-wise along the roller surface.
____
(f) Install the parts.
S 426-004
(3) Install the inboard foreflap carriage and toggle (AMM 27-51-24/401).
TASK 27-51-24-226-007
3. Inboard Foreflap Flight and Center Toggle Roller Inspection (Fig. 601)___________________________________________________________
A. Standard Tools and Equipment
(1)
Vernier Caliper
B.
References
(1)
AMM 29-11-00/201, Main Hydraulic Supply System
(2)
IPC 27-51-24, Fig. 1
C.
Access
(1)
Location Zone 563 Outboard Flap Track Fairing, Inboard Flap, LH (Track No. 3) 561 Inboard Flap Track Fairing, Inboard Flap, LH (Track No. 4) 661 Inboard Flap Track Fairing, Inboard Flap, RH (Track No. 5)
663 Outboard Flap Track Fairing, Inboard Flap, RH (Track No. 6)
D. Prepare To Inspect the Rollers
S 866-008
(1) Pressurize hydraulic system No. 1 (AMM 29-11-00/201).
S 866-014
WARNING: MAKE SURE THAT PERSONS AND EQUIPMENT ARE CLEAR OF THE LE AND TE
_______ FLAPS AND FLAP DRIVE MECHANISMS BEFORE YOU MOVE THE FLAP CONTROL LEVER. THE FLAPS WILL MOVE QUICKLY WHEN YOU MOVE THE FLAP CONTROL LEVER.
(2) Put the flap control lever in the 5-unit detent to move the flaps to the 5-unit position.
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A 747-400 MAINTENANCE MANUAL
SEE A
DEADWEIGHT ROLLER
A
CENTER TOGGLE ROLLER
A1
1.
BEARING/BOLT
2.
BEARING/BOLT
FLIGHT ROLLER
TOGGLE
1
ROLLER
A
A-A
1 REPLACE BEARING IF FLAT SPOT WEAR ON BEARING SURFACE EXCEEDS 0.32 INCH (8.1 mm). DESIGN LIMITS WEAR LIMITS
PERMITTED MAXIMUMDIAMETER REPLACEINDEX WEAR DIAMETER
WORNPART NAME DIM.
NO. MINIMUM MAXIMUM DIMENSION CLEARANCE PART
INCHES INCHES INCHES INCHES
(mm) (mm) (mm) (mm)
1 BEARING ID 0.4990 0.4993 (12.68) 0.5000 (12.70 0.4995 0.4950 (12.81) 0.5045 0.005 (0.12) X
BOLT OD (12.67) (12.68) (12.57) X
0.5000 0.5005 0.5045
BEARING ID (12.70) (12.71) (12.81) 0.005 X
2 0.4990 0.4995 0.4940 (0.12)
BOLT OD (12.67) (12.68) (12.54) X
Inboard Foreflap Carriage and Toggle Wear Limits
Figure 601
0.32 INCH
(8.1 mm)
MAXIMUM
