(d)
Move the manual override lever on the bypass valve LE slat PDU to the bypass position (POS 1).
(e)
Move the flap control lever to the 1-unit detent.
(f)
Make sure the LE slats do not move.
(g)
Move the flap lever to the 5-unit detent.
(h)
Make sure that the TE flaps go to the 5-unit position in 12-14 seconds after the flap control lever is moved.
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757
MAINTENANCE MANUAL
(i)
Move the flap control lever to the 1-unit detent.
(j)
Make sure the TE flaps go to the 1-unit position in 12-14 seconds after the flap control lever is moved.
(k)
Move the flap control lever to 30-unit detent, and let the flaps fully extended.
(l)
Move the manual override lever on the bypass valve for the TE flap PDU to the bypass position (POS 1).
WARNING: DO NOT MOVE THE MANUAL OVERRIDE LEVER ON THE BYPASS VALVE
_______ OF THE FLAP PDU. MOVEMENT OF THE MANUAL OVERRIDE LEVER WILL CAUSE THE FLAPS TO MOVE AND POSSIBLE INJURY TO PERSONS.
(m) Make sure no trip indicators on the flap transmissions are released.
NOTE: If a trip indicator is above the adjacent surface
____ the trip indicator was released. If there is no history of a TE FLAPS DISAGREE message on EICAS, then you do not need to remove or replace the flap transmission. Manually reset the trip indicator by pushing the pin in until the end stays aligned with the housing. Cycle the flaps to make sure that the indicator does not get tripped again.
(n)
Move the manual override lever on the bypass valve for the TE flap PDU to the usual position (POS 2).
(o)
Move the flap control lever to the zero (FLAPS UP) detent, and let the TE flaps fully retract.
(p)
Move the manual override lever on the bypass valve for the LE slat PDU to the usual position (POS 2).
(q)
Push arming switch for the alternate drive of LE slat to disarm the slat alternate drive (switch light off).
(r)
Remove the DO-NOT-CLOSE tags, and close these circuit breakers on the P11 panel: 1) 11C14, FLAP SLAT ELEC UNIT 2 POWER 2) 11H23, FLAP/SLAT ALTN DR SHUTOFF ARM 3) 11H24, FLAP/SLAT ALTN DR SHUTOFF 2
(s)
Erase the EICAS message, FLAP ISLN VAL from the ECS/MSG display.
(t)
Make sure the EICAS message, FLAP ISLN VAL, does not show on the status display.
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A
757 MAINTENANCE MANUAL
(u)
Make sure the TRAILING EDGE and LEADING EDGE lights are off.
(v)
Make sure the EICAS message, FLAT/SLAT ELEC does not show on the status display and ECS/MSG display.
K.
Asymmetry Detection Response - Test
S 735-049
(1)
Do the steps that follow:
(a)
Move the flap control lever to the 15-unit detent.
(b)
Let the flaps stop at 15-unit position and the slats stop at the intermediate position.
(c)
Remove the pressure from the left hydraulic system (AMM 29-11-00/201).
(d)
Install the lock for the flap PDU (Fig. 505).
(e)
Make a mark of the position of the torque tube coupling on the inboard side of flap PDU.
(f)
At the inboard transmission on the left wing inboard flap, measure the distance between the face of the upstop and the face of the ballnut (Dimension X, Fig. 503).
(g)
Disconnect the torque tube coupling from the inboard side of the TE flap PDU. Attach a clamp to the torque tubes in the right wing (Fig. 504).
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