E. Procedure
(1) Do the steps that follow to install the lever and clamp tool on the applicable drivescrew:
NOTE: The lever and clamp tool is part of the C27030-33 tool. The lever and clamp tool is a one-piece tool. There is an adjustment screw which connects the clamp and the lever together. This screw can be loosened to adjust the two tools so the load noses fit correctly on the drivescrew.
(a)
With a rag, clean the oil and the dirt from the surface of the drivescrew where the clamp of the lever and clamp tool will be attached.
NOTE: If it is necessary, you can put a mild solvent on the rag.
(b)
Attach the lever and clamp tool on the drivescrew, aft of the ballnut.
1) Move the lever and clamp along the drivescrew until the load noses of the tool touch the aft end of the ballnut.
NOTE: Make sure the load noses of the tool are set so that the handles of the tool are approximately in line with the ballnut trunnions.
2) Tighten the clamp to 200-300 pound-inches.
NOTE: Make sure the handles of the lever assembly are in the relaxed position.
(2)
Install the dial indicator forward of the ballnut so that the extension of the indicator touches the forward end of the ballnut.
(a) Put the dial indicator to zero.
(3)
Move the handles of the lever tool together until the movement on the dial indicator stops.
(a) Make sure the lever and clamp tool do not move along the length of the drivescrew when you move the handles together. 1) If the lever and clamp tool move, do the steps again to install the lever and
clamp tool.
NOTE: It can be necessary to use a higher torque value if the tool moves but do not use a torque greater than 300 pound-inches.
(b)
Write down the value which is shown on the dial indicator.
NOTE: The value shown on the dial indicator is the value for the backlash of the drivescrew.
(c)
Do these steps a total of five times to make sure the dial indicator movement is repeatable and consistent.
(4)
If the backlash value is more than 0.0095 inch for Thomson Saginaw or Beaver Precision drivescrews, or more than 0.0057 inch for Umbra Cuscinetti drivescrews, install a new drivescrew (AMM 27-51-73/401).
(5)
Remove the lever and clamp tool from the drivescrew.
(6)
Remove the dial indicator from the drivescrew.
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F. Put the Airplane Back to Its Usual Condition
(1)
Do the activation procedure for the drive system for the trailing edge flaps
(AMM 27-51-0/201).
(2)
Do the applicable steps that follow to close the access for the drivescrews:
(a)
At the positions No. 1, No. 2, No. 7 or No. 8, install the center fairing (AMM 27-51-121/401).
(b)
At the No. 3 or No. 6 position, install the tailcone assembly (AMM 27-51-141/401).
(c)
At the No. 4 or No. 5 position, install the fairing for the inboard track of the inboard flap (AMM 27-51-141/401).
(3)
Remove the electrical power if it is not necessary (AMM 24-22-0/201).
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May 01/99 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 27-51-73 Page 609
OUTBOARD MIDFLAP CARRIAGE - REMOVAL/INSTALLATION
1. Equipment and Materials
A. Sealant - BMS 5-95, Class B (Ref 20-30-11)
B. Corrosion Preventative Compound - MIL-C-11796, Class 3 (Ref 20-30-21)
C. Deleted
D. Grease - MIL-G21164 (Ref 20-30-21)
E. Sealant - BMS 5-79, Class C (Ref 20-30-11)
F. Teflon Filled Coating - BMS 10-86, Type II (Ref 20-30-41)
G. Primer - BMS 10-11, Type 1 (Ref 20-30-41)
H. Corrosion Preventive Compound - BMS 3-27 (Mastinox 6856K)
2. Remove Outboard Midflap Carriage
A. Remove outboard trailing edge flap (Ref 27-51-72 R/I).
B. Remove access panels from upper surface of midflap to gain access to carriage bearing support.
C. Remove bolt attaching safety link to inboard side of each flap carriage (Fig. 401).
D. Remove special bolt attaching spherical bearing to carriage.
E. Slide carriage out of flap. If carriage binds, first remove two bolts attaching carriage bearing support to midflap forging. Remove shims from area between carriage support and midflap, stow shims for reinstallation then remove carriage (View 1).
F. If spherical bearing requires replacement, remove bearing.
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