S 866-026
(6)
Remove the electrical power if it is not necessary (AMM 24-22-00/201).
TASK 27-51-00-026-027
4. Inboard TE Flap Outbd Angle Gearbox Inspection (Fig. 603)
_________________________________________________________
A. Equipment
(1)
Dial Indicator - (clamp type with adjustable stem adaptor)
B.
References
(1)
AMM 24-22-00/201, Electrical Power - Control
(2)
AMM 27-51-10/401, Inboard TE Flap Drive Outbd Angle Gearbox
(3)
AMM 27-51-30/201, Inboard TE Flap Track Fairing
(4)
AMM 29-11-00/201, Main (Left, Right and Center) Hydraulic Systems
(5)
AMM 32-00-15/201, Landing Gear Door Locks
(6)
AMM 32-00-20/201, Landing Gear Down Locks
C.
Access
(1)
Location Zones
143/144 MLG Wheel Well
211/212 Control Cabin
710 Nose Landing Gear and Doors
730/740 Main Landing Gear and Doors
D.
Procedure
S 216-028
(1)
Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201).
(2)
Supply electrical power (AMM 24-22-00/201).
S 866-067
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A
757
MAINTENANCE MANUAL
S 016-029
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 866-030
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.
(4)
Pressurize the left hydraulic system (AMM 29-11-00/201).
S 866-031
(5)
Move the flap control lever to the 30-unit detent and make sure that the TE flaps move to the fully extended position.
S 866-032
(6)
Remove the power from the left hydraulic system (AMM 29-11-00/201).
S 486-033
(7)
Install a DO-NOT-OPERATE tag on the flap control lever.
S 866-034
(8)
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 866-035
(9)
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
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A
757 MAINTENANCE MANUAL
S 016-036
(10)
Remove the forward flap track fairing (AMM 27-51-30/201).
S 226-037
(11)
Measure the total axial shaft movement of the angle 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.
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