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757 MAINTENANCE MANUAL
D. Procedure
S 216-014
(1)
Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201).
S 866-068
(2)
Supply electrical power (AMM 24-22-00/201).
S 016-015
WARNING: USE THE PROCEDURE IN AMM 32-00-15 TO INSTALL THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(3)
Open the doors for the landing gear and install the door locks (AMM 32-00-15/201).
S 486-016
(4)
Install a DO-NOT-OPERATE tag on the flap control lever.
S 866-017
(5)
Open these circuit breakers on overhead panel, P11, and attach DO-NOT-CLOSE tags:
(a)
11B18, WARN ELEX B
(b)
11D31, HYDRAULICS PTU CONT
(c)
11H23, FLAP/SLAT ALTN DR SHUTOFF ARM
(d)
11J18, FLAP LOAD RELIEF
(e)
11J33, WARN ELEX A
S 866-018
(6)
Open these circuit breakers on main power distribution panel, P6, and attach DO-NOT-CLOSE tags:
(a)
6D20, ALTN SLAT PWR
(b)
6D23, ALTN FLAP PWR
S 016-019
(7) Remove the landing gear retract actuator access panel 551BB left or 651BB right (AMM 06-44-00/201).
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757
MAINTENANCE MANUAL
S 226-020
(8)
Measure the total axial shaft movement of the outboard tee gearbox:
(a)
Clamp the dial indicator or equivalent to the gearbox assembly.
NOTE: Movement of the gearbox assembly can cause an incorrect
____ measurement if the indicator is clamped to any other nearby structures.
(b)
Push the coupling sleeve and output shaft in (10-30 pounds) (45-130 newtons) by hand. Set the indicator to zero.
(c)
Pull the coupling sleeve and output shaft out (10-30 pounds) (45-130 newtons) by hand.
(d)
Make a record of the total axial movement.
(e)
Push the coupling sleeve and input shaft in (10-30 pounds) (45-130 newtons) by hand. Set the indicator to zero.
(f)
Pull the coupling sleeve and input shaft out (10-30 pounds) (45-130 newtons) by hand.
(g)
Make a record of the total axial movement.
(h)
If the total axial movement at one of the two measurement locations is more than 0.015 inches (0.38 mm), then replace the gearbox assembly (AMM 27-51-08/401).
E.
Put the Airplane Back to Its Usual Condition
S 416-021
(1)
Install the landing gear retract actuator access panel 551BB left or 651BB right (AMM 06-44-00/201).
S 866-022
(2)
Remove the DO-NOT-CLOSE tags, and close these circuit breakers on the overhead panel, P11:
(a)
11B18, WARN ELEX B
(b)
11D31, HYDRAULICS PTU CONT
(c)
11H23, FLAP/SLAT ALTN DR SHUTOFF ARM
(d)
11J18, FLAP LOAD RELIEF
(e)
11J33, WARN ELEX A
S 866-023
(3)
Remove the DO-NOT-CLOSE tags, and close these circuit breakers on the main power distribution panel, P6:
(a)
6D20, ALTN SLAT PWR
(b)
6D23, ALTN FLAP PWR
(4)
Remove the DO-NOT-OPERATE tag from the flap control lever.
S 086-024
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757 MAINTENANCE MANUAL
S 416-025
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