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MAINTENANCE MANUAL
(b)
Make sure that the trailing edge upper surface of the left elevator aligns, by less than | 0.05 inch (| 1.3 mm), with the datum mark from the middle PCA adjustment.
(c)
If the surface does not align correctly, adjust the input pogo rod for the inboard PCA as necessary.
NOTE: Always adjust the input pogo rod such that the elevator
____ moves up, in the direction of the datum marks, not down.
(d)
If you adjusted the input pogo rod, make sure the rod end threads are engaged correctly in the pogo rod (Fig. 509).
(e)
Tighten the jamnut on the pogo rod, but do not install a lockwire.
(f)
Make sure the elevator trailing edge still aligns with the datum mark on the index plate, | 0.05 inch (| 1.3 mm), after the pogo rod jamnut is tightened.
(g)
Remove the power from the inboard PCA. 1) Remove the pressure from the center hydraulic system (AMM 29-11-00/201). 2) Put the C FLT CONTROL SHUTOFF switch on the P61 panel to the OFF position.
3) Open this circuit breaker on the P11 panel and attach a DO-NOT-CLOSE tag: a) 11H18, FLT CONT SHUTOFF TAIL CTR
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(5) Adjust the middle, inboard, and outboard PCA input pogo rods for the right elevator with the same procedures and the same sequence that were done for the left elevator.
NOTE: The right elevator is operated by the same hydraulic
____ system, circuit breakers, and switches, as the left elevator. (left middle and right middle, left outboard and right outboard, and left inboard and right inboard).
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(6)
Do these steps to make sure that the input pogo rods for the elevator PCAs are adjusted correctly:
(a)
Supply power to the middle PCAs on the left and right elevators. 1) Remove the DO-NOT-CLOSE tag and close this circuit breaker
on the P11 panel:
a) 11H17, FLT CONT SHUTOFF TAIL LEFT
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ALL ú ú 08 Page 557 ú May 28/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
(b)
(c)
(d)
(e)
757 MAINTENANCE MANUAL
2) Put the L FLT CONTROL SHUTOFF switch on the P61 panel to the ON position.
WARNING:_______ KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL
SURFACES WHEN HYDRAULIC POWER IS SUPPLIED. AILERONS,
ELEVATORS, RUDDER, FLAPS, SLATS, SPOILERS, AND
STABILIZER ARE FULLY POWERED SURFACES. INJURY TO
PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR WHEN
HYDRAULIC POWER IS SUPPLIED.
3) Pressurize the left hydraulic system (AMM 29-11-00/201).Make a mark on the index plates to show the position of the upper surfaces of the left and right elevator trailing edge (Fig. 505).
NOTE: These marks will be used as datum for the outboard and
____ inboard PCA adjustment.
Remove the power from the middle PCAs on the left and right elevators. 1) Remove the pressure from the left hydraulic system
(AMM 29-11-00/201). 2) Put the L FLT CONTROL SHUTOFF switch on the P61 panel to the OFF position.
3) Open this circuit breaker on the P11 panel and attach a DO-NOT-CLOSE tag: a) 11H17, FLT CONT SHUTOFF TAIL LEFT
Supply power to the outboard PCAs on the left and right elevators. 1) Remove the DO-NOT-CLOSE tag and close this circuit breaker
on the P11 panel: a) 11H28, FLT CONT SHUTOFF TAIL RIGHT 2) Put the R FLT CONTROL SHUTOFF switch on the P61 panel to
the ON position. 3) Pressurize the right hydraulic system (AMM 29-11-00/201).Make sure the trailing edge of the left and right elevator upper surfaces align, by less than | 0.05 inch (| 1.3 mm), with the datum marks from the previous step.
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