F95676 F95764 G17368
Flap Gap and Misfair Requirements 543
27-51-72 Figure 502 May 20/82
Page 504
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
533 Outboard Trailing Edge Flap Positioning
Nov 15/71 Figure 503 27-51-72
Page 505
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
Flap Transmission Assembly Adjustment 500
27-51-72 Figure 504 Nov 15/72
Page 506
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(11)
Position flap control lever to 40-unit detent to extend flaps.
(a)
Check that ballscrew nut downstop is not less than 1/4 turn from contact.
(b)
Check that opposite midflaps are symmetrical within 1 degree. Measure along lower surface of midflap at outboard flap track using protractor.
(12)
If ballscrew upstop clearance or midflap symmetry in steps (10) and (11) are not within limits proceed as follows:
(a)
Depressurize hydraulic system A (Ref 27-51-0).
(b)
Disconnect torque tubes from transmission assemblies and rotate transmissions as required to obtain adjustment.
(c)
Connect torque tubes to transmission assemblies. Lockwire heads of torque tube screws together.
(d)
Provide system A hydraulic power (Ref 27-51-0).
(e)
Recheck ballscrew upstop clearance and midflap symmetry per steps (10) and (11).
(13)
At outboard end of midflap, ensure that outboard face of roller and outboard edge of ramp are flush within 0.05 inch (View 1, Fig. 501). If they are not flush, remove ramp and adjust shim thickness as required (0.15 inch maximum shim). Adjust for 0.005- to 0.040-inch clearance between roller and ramp.
(14)
At the inboard end of the midflap, make sure there is clearance between the deflection roller and the upper and the lower surfaces of the fairing pocket (View 2, Fig. 501).
(a) Adjust the deflection roller if it touches the fairing pocket: 1) Extend the trailing edge flaps. 2) Loosen the nuts that attach the deflection roller and the serrated plate to the
roller shaft. 3) Move the deflection roller up or down as necessary for clearance. 4) Tighten the nuts. 5) Retract the flaps and check for clearance.
501
Oct 20/91 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-51-72 Page 507
(15)
Adjust outboard flap track fairing (Ref 27-51-121 A/T).
(16)
Set flap control lever in FLAP UP detent to retract flaps to normal up position. Check misfair between wing lower trailing edge panel and lower surface of midflap is per Fig. 502. If misfair exceeds limits, adjust trailing edge panel tie rods, and lower panel angle support at inboard end of flap, to reduce misfair to as near zero as possible.
(17)
With flaps in full up position, adjust seal retainer to compress seals per Fig. 502. Check clearance of seal support (on wing lower trailing edge panel) with respect to leading edge of midflap is per Fig. 502. If adjustment is necessary, loosen seal support retaining screws, position seal support to obtain clearance, and tighten retaining screws. Fill gap between skin and seal support with aerodynamic smoother.
(18)
Measure the deflection of the leaf springs on the outboard flap (Fig. 503).
(a)
Measure the dimension A.
(b)
Move the flap control lever to the 40-unit detent to extend the flaps.
(c)
Measure the dimension A again.
(d)
Make sure the dimension A in the retracted position is 0.42 to 0.82 inch less than the dimension A in the extended position.
(e)
If the change in the dimension A is not in the tolerance, adjust the leaf springs: 1) Remove the access panels from the top surface of the midflap. 2) Remove the fasteners that attach the leaf spring. 3) Change or move the tapered fillers until the deflection is in the tolerance.
NOTE: You can install the tapered fillers independently or at each track location. You can put the thick end forward or aft. It is not necessary for the thick end of the tapered fillers to be in the same location.
4) Attach the leaf spring with the bolt at the forward attach point. 5) Attach the retainer and the radius filler: a) Install the shims between the retainer and the midflap to keep a 0.005 to 0.015-inch clearance between the leaf spring and the retainer.
NOTE: If you change the shims below the carriage bearing support, change the thickness of the shims at the leaf springs (i.e., if you add a 0.01 inch shim below the carriage bearing support, remove a 0.01 inch shim below the leaf spring retainer).
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