FLAP DRIVE MECHANISM.
(4)
If you will disconnect the ball screw at flap track location number 1, 2, 7 or 8, install the outboard trailing edge flap lock tool on the carriage of the outboard trailing edge flap at the location of the ball screw that will be disconnected.
(a)
Adjust the tool to the correct length.
(b)
Loosen the roller lock screws until the roller hook openings are clear.
(c)
Attach a safety cable to the airplane structure.
(d)
Put the hooks on the deadweight rollers of the forward bogie.
(e)
Adjust the roller lock screws to touch the rollers.
(f)
Adjust the flap position or the tool length to make sure you can put the pin through the tool into the failsafe bar.
NOTE: If you adjust the tool too much at flap track location
____ number 2, or 7, you cannot install the pin at flap track location number 1 or 8.
(g) Tighten the star knob. Make sure the serrations engage.
S 944-009
CAUTION: DO NOT MOVE THE INBOARD FLAPS AFTER YOU INSTALL ONE FLAP LOCK.
_______ IF YOU CANNOT INSTALL THE SECOND LOCK, REMOVE THE FIRST LOCK BEFORE YOU READJUST THE FLAPS. YOU CAN CAUSE DAMAGE TO THE FLAP DRIVE MECHANISM.
(5)
If you will disconnect the ball screw at flap track location 3, 4, 5 or 6, install the inboard trailing edge flap lock on the carriage of the inboard trailing edge flap at the location of the ball screw that will be disconnected.
(a)
Adjust the tool to the correct length.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
FWD
OUTBOARD
TE FLAPS
INBD INBOARD SEE B
TE FLAPS HOLE LOCATION
NO. 3 OR 6 TE
SEE A FLAP TRACK (REF)
FAIL SAFE BAR
INBOARD
FLAP
TRACK
INBOARD TE FLAP LOCK
(SHOWN INSTALLED IN
FORWARD NO. 4 OR 5 TE FLAP
BOGIE TRACK)
INBOARD TE FLAPS
A
OUTBOARD FLAP TRACK FWD OUTBOARD TE FLAP LOCKFORWARD BOGIE
OUTBOARD TE FLAPS B
Flap Lock Installation Figure 401
M03378
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
(b)
Loosen the roller lock screws until the roller hook openings are clear.
(c)
Attach a safety cable to the airplane structure.
(d)
Adjust the roller lock screws to touch the rollers.
(e)
Adjust the flap position or the tool length to make sure you can put the pin through the tool into the failsafe bar.
NOTE: Engage the pin ball-lock feature and the top of the
____ bushing, with a 1.00 inch (25.4 mm) clearance between the tool and the failsafe bar. If you adjust the tool too much at flap track location number 4 or 5, you cannot install the pin at flap track location number 3 or 6.
1) Insert the pin through the forward hole of the lock at flap track location number 4 or 5, and the aft hole of the lock at flap track location number 3 or 6. Slide the pin through the bushed hole in the bottom of the track failsafe bar.
(f)
Tighten the star knob. Make sure the serrations engage.
F.
Remove the Actuator Attach Fitting
S 934-010
(1) Measure and write down the dimension Y, as shown on Fig. 402, on all four transmissions of the flap set where you will disconnect the ball screw (5) to remove the actuator attach fitting.
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