B. Equipment
(1)
TE Flap PDU Lock - B27008-1
C.
References
(1)
24-22-00/201, Electrical Power - Control
(2)
29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems
D.
Access
(1)
Location Zones
143 MLG Wheel Well (Left)
211/212 Control Cabin
511/611 Leading Edge to Front Spar
710 Nose Landing Gear and Doors
730/740 Main Landing Gear and Doors
E.
Normal Hydraulic Operation of the TE Flap System
S 212-005
(1)
Make sure the PDU lock is removed from the TE flap PDU (Fig. 203).
S 862-006
(2)
Do these steps to extend the TE flaps:
(a)
Make sure the TE flaps and leading edge (LE) slats are in the fully retracted position and the flap control lever is in the zero (FLAPS UP) detent.
(b)
Supply electrical power (Ref 24-22-00).
WARNING: KEEP PERSONS AND EQUIPMENT AWAY FROM ALL CONTROL SURFACES
_______ WHEN HYDRUALIC 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 HYDRUALIC POWER IS SUPPLIED.
CAUTION: MAKE SURE THE ACCESS DOOR FOR THE ENGINE STRUT, THE
_______ INBOARD FAN COWLING, AND THE THRUST REVERSER COWLING ARE CLEAR FROM THE MOVEMENT OF THE SLATS. IF THE MOVEMENT OF THE SLATS IS BLOCKED, IT CAN CAUSE DAMAGE TO THE AIRPLANE.
(c)
Pressurize the left hydraulic system (Ref 29-11-00).
(d)
Move the flap control lever to the necessary detent and let the flaps and slats move to the correct positions.
(e)
If you do work near the flap or slat systems, deactivate the flap drive system.
(f)
Remove the power from the left hydraulic system if it is not necessary (Ref 29-11-00).
(g)
Remove the electrical power if it is not necessary (Ref 24-22-00).
S 862-007
(3)
Do these steps to retract the TE flaps:
(a)
Make sure the position of the TE flaps and LE slats and the position of the flap control lever are the same.
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757 MAINTENANCE MANUAL
(b) Supply electrical power (Ref 24-22-00).
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.
CAUTION: MAKE SURE THE ACCESS DOOR FOR THE ENGINE STRUT, THE
_______ INBOARD FAN COWLING, AND THE THRUST REVERSER COWLING ARE CLEAR FROM THE MOVEMENT OF THE SLATS. IF THE MOVEMENT OF THE SLATS IS BLOCKED, IT CAN CAUSE DAMAGE TO THE AIRPLANE.
(c)
Pressurize the left hydraulic system (Ref 29-11-00).
(d)
Put the flap control lever in the zero (FLAPS UP) detent and make sure the TE flaps and LE slats move to the fully retracted position.
(e)
Remove the electrical power if it is not necessary (Ref 24-22-00).
(f)
Remove the power from the left hydraulic system if it is not necessary (Ref 29-11-00).
F.
Alternate Electric Operation of the TE Flaps
S 092-033
(1)
Make sure the PDU lock is removed from the TE flap PDU (Fig. 203).
S 862-008
(2)
Do these steps to extend the TE flaps:
CAUTION: DO NOT OPERATE THE ALTERNATE DRIVE MOTOR CONTINUOUSLY FOR
_______ MORE THAN 12 MINUTES (2 FLAP CYCLES). DO NOT OPERATE THE MOTOR AGAIN UNTIL IT IS COOL FOR AT LEAST 3 MINUTES TO PREVENT DAMAGE TO THE MOTOR.
(a)
Make sure the TE flaps and LE slats are in the fully retracted position and the flap control lever is in the zero (FLAPS UP) detent.
(b)
Make sure the position selector switch for the flap/slat alternate drive, on the first officers main instrument panel, P3, is in the NORM detent.
(c)
Supply electrical power (Ref 24-22-00).
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