S 414-009
(2)
Install the access doors 577AT, 577BT, 577CT, 577DT, 577ET, 577FT (on the left wing) or 677AT, 677BT, 677CT, 677DT, 677ET, 677FT, (on the right wing) on the top surface of the midflap.
S 414-010
(3)
Install the trailing edge flaps (Ref 27-51-01/401).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-51-23
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
INBOARD FLAP CARRIAGE - INSPECTION/CHECK
________________________________________
1. General_______
A. This procedure contains one task, an inspection of the inboard flap carriage. To do the check, you measure the inner diameters of the bearings and the outer diameter of the carriage spindles.
B. You usually do this procedure before you install a carriage in a midflap. You must remove the carriage removed from the airplane to do this procedure.
C. In the second part you make sure that the main carriage retainter nut is correctly tightened.
TASK 27-51-23-206-001
2. Inboard Flap Carriage Inspection________________________________
A. Standard Tools and Equipment
(1)
Micrometer - 1 to 2 inch (2 to 5 cm), To Measure Inner Dimensions
(2)
Micrometer - 1 to 2 inch (2 to 5 cm), To Measure Outer Dimensions
(3)
Micrometer - 4 to 5 inch (10 to 13 cm), To Measure Inner Dimensions
(4)
Micrometer - 4 to 5 inch (10 to 13 cm), To Measure Outer Dimensions
B.
References
(1)
27-51-23/401, Inboard Flap Carriage
(2)
IPC 27-51-06, 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 flap carriage (Ref 27-51-23/401).
S 226-003
(2)
Examine the inboard flap carriage bearings and spindles for worn areas:
(a)
Remove the parts to be examined.
(b)
Use a micrometer to measure the parts.
(c)
Compare the dimensions you measured, with the permitted dimensions shown in Fig. 601.
(d)
Repair or replace the parts which are not in the tolerance.
(e)
Install the parts.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
27-51-23
ALL ú ú 01 Page 601 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 426-004
(3)
Install the inboard flap carriage (Ref 27-51-23/401).
E.
Examine The Torque Of The Main Carriage Retainer Nut
S 866-005
(1)
Pressurize hydraulic systems No. 1 and 4 (Ref 29-11-00/201).
S 866-007
(2)
Put the flap control lever in the 30 unit detent to extend the flaps.
S 026-011
(3)
Remove the lockbolt from the retainer nut.
S 026-010
(4)
Remove the locknut and retainer from the retainer nut.
S 226-009
(5)
Make sure the retainer nut is tightened to 400 pound-feet (540 N-m).
S 426-012
(6)
Install the locknut and retainer on the retainer nut.
S 426-013
(7)
Install the lockbolt on the retainer nut.
S 426-014
(8)
Install the lockwire.
(9)
Put the flap control lever in the UP detent to retract the flaps.
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