747-400
MAINTENANCE MANUAL
SEE A
SEE B
A
A
SUPPORT FITTING
A
3. BUSHING/ FUSE BOLT FLAP TRACK
2. SUPPORT FITTING/ BUSHING
FWD
1. BALL BEARING RACE
B
Inboard Flap Outboard Track Wear Limits
Figure 601 (Sheet 1)
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A
747-400
MAINTENANCE MANUAL
NO. INDEX PART NAME DIM. DESIGN LIMITS WEAR LIMITS WORN PART REPLACE PART WORN REPAIR INSTR. REPAIR
DIAMETER ITTED PERM-WEAR DIM. CLEAR-MAX ANCE DIAM
MIN MAX
1 BALL BEARING RACE -- -- -- -- 1 X
2 SUPPORT FITTING ID 1.4375 1.4385 1.4389 0.000
BUSHING OD 1.4389 1.4399 -- X 2
3 BUSHING ID 1.2495 1.2510 1.2540 0.0085 X
FUSE BOLT OD 1.2475 1.2490 1.2455 X 3
0.0060 INCH MAXIMUM RADIAL MOVEMENT, 0.0120 INCH MAXIMUM AXIAL MOVEMENT
0.000 TO 0.0024 INCH INTERFERENCE FIT STRIP AND CHROME PLATE TO THE DESIGN TOLERANCES. USE THE INSTRUCTIONS IN THE STANDARD OVERHAUL
PRACTICES MANUAL
Inboard Flap Outboard Track Wear Limits
Figure 601 (Sheet 2)
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747-400
MAINTENANCE MANUAL
A
(2 LOCATIONS)
(OPTIONAL CONFIGURATION) A-A
4
FLAP TRACK TO SIDELOAD FITTING WEAR. MEASURE WITH THE FLAP TRACK FULLY SUPPORTED BY MOUNTING BOLTS. DESIGN LIMITS 0.002 TO 0.045 INCH BETWEEN TRACK AND BEARING WASHER (TRIM THE PLAIN BUSHING IF NECESSARY TO GET THE SPECIFIED GAP). MAXIMUM WEAR 0.060 INCH GAP. MEASURE FROM THE FORWARD SIDE OF THE FLAP TRACK, DUE TO THE TAPERED TOP SURFACE.
5
THE SUM OF THE CLEARANCES A AND B BETWEEN THE FLAP TRACK AND THE VERTICAL FLANGE OF THE BEARING PLATE HAS A DESIGN TOLERANCE OF 0.01 TO 0.05 INCH. THE MAXIMUM TOLERANCE IS 0.09 INCH.
Inboard Flap Outboard Track Wear Limits
Figure 601 (Sheet 3)
H73991
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747-400 MAINTENANCE MANUAL
INBOARD FLAP OUTBOARD TRACK - REPAIRS
_____________________________________
1. General
_______
A. There is one task in this procedure, the removal of corrosion from the inboard flap outboard track.
(1)
The procedure has these parts:
(a)
The removal of the foreflap carriage and stop
(b)
The removal of corrosion from the track
(c)
The preparation of the track surface
(d)
The installation of the foreflap carriage stop.
TASK 27-51-25-308-001
2. Inboard Flap Outboard Track Corrosion Removal
_____________________________________________
A. Consumable Materials
(1)
C00259 Enamel - Primer, Green, BMS 10-11
(2)
C00032 Enamel - Exterior, Decorative, Protective, BMS 10-60, Type I
B.
References
(1)
AMM 27-51-25/401, Inboard Flap Outboard Track
(2)
SOPM 20-10-02, Machining of Alloy Steel
(3)
SOPM 20-10-03, Shot Peening
(4)
SOPM 20-42-10, Low Hydrogen Embrittlement Cadmium Plating
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