F.  Test LE and TE Flap Aural Warning Circuits - Engines not running and airplane on theground using external power. (Airplanes with flaps LE WARNING TEST switches installed on E3-2 shelf/stanchion).
[Airplanes with and without EPR Activated T/O Warn System]
(1)  
If not already done, disconnect the D770 connector from the V47 ground interconnect valve.

(2)  
Provide trailing edge flap system A hydraulic power (Ref 27-51-0 MP or 29-11-0 MP) if necessary.

(3)  
Place stabilizer so that stabilizer position indicator pointer is within one unit of center of green band.

(4)  
Place speed brake lever in zero degree detent position.

(5)  
Verify thrust levers are at idle and flaps are fully retracted.

(6)  
Close the following circuit breakers on P6 panel.

(a)  
LE FLAP POSITION INDICATOR - DC

(b)  
LE FLAP POSITION INDICATOR - AC

(c)  
MASTER DIM (section 6)

(d)  
LANDING GEAR LIGHTS

(e)  
AURAL WARNING

(f)  
On airplanes with EPR activated take-off warning system,
1) ENG NO. 1 EPR AND LG WARNING
2) ENG NO. 2 EPR AND LG WARNING
3) EPR WARNING

(7)  
Warning horn remains silent at completion of circuit breaker closures in previous step (4).

(8)  
On airplanes with EPR activated take-off warning system only, open ENG NO. 1 EPR AND LG WARNING and ENG NO. 2 EPR AND LG WARNING circuit breakers. Horn shall remain silent.

(9)  
Fully advance both throttle levers. The intermittent horn shall sound.

(10)
Pull to unlock, then set and hold LE warning OVERRIDE TEST switch (S785, E3-2 shelf) to OVERRIDE position. Warning horn continues to sound and No. 1 and 4 LE FLAP EXTEND lights at P5-12 LE annunciator panel come on (green).

(11)
Extend flaps to FLAPS 1 position. Horn stops. Return OVERRIDE TEST switch to center position.

(12)
Extend flaps to FLAPS 25 position. Horn remains silent and No. 1 and 4 LE FLAP EXTEND green lights remain on at LE annunciator panel.

(13)
Pull to unlock, then set and hold LE warning test switch (S784 E3-2 shelf) to L LE TEST position. Warning horn sounds and No. 1 LE FLAP EXTEND green light on LE annunciator panel goes out. Return test switch to NORMAL position. Horn stops and No. 1 LE FLAP EXTEND green light comes on.

(14)
Pull to unlock, then set and hold test switch to R LE TEST position. Warning horn sounds and No. 4 LE FLAP EXTEND green light goes out at LE annunciator panel. Return test switch to NORMAL position. Horn stops an No. 4 LE FLAP EXTEND green light comes on.

(15)
Extend flaps to not less than FLAPS 30 position. Horn sounds at or before FLAPS 30 position and remains sounding thru any greater position. Retract flaps to FLAPS 25 position. Horn stops and remains silent through FLAPS 1 position.

(16)
Pull to unlock, then set and hold LE warning OVERRIDE TEST switch (S785) to OVERRIDE position. Retract flaps to FLAPS O position. Horn sounds and all LE FLAPS EXTEND green lights go out except No. 1 and 4.

(17)
Return OVERRIDE TEST switch to center position. Horn continues to sound and No. 1 and 4 LE FLAP EXTEND green lights go out. Extend flaps to FLAPS 1 position. Horn stops and LE FLAPS EXTEND green lights come on.

(18)
Return switches to center position.

(19)
Return flaps to normal positions, or as required.

(20)
Close circuit breakers previously opened.

(21)
Airplanes with EPR activated take-off warning system; Close the ENG NO. 1 EPR AND LG WARNING and ENG NO. 2 EPR AND LG WARNING circuit breakers.

501 
May 01/00  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  31-26-0 Page 531 

G.  Restore Airplane to Normal
(1)  
Return speed brakes to down, stabilizer to green band range and flaps to takeoff range, if required.

(2)  
On airplanes incorporating SB 31-1059, set parking brake and restore interconnect valve as follows:

(a)  
Place ground interconnect valve manual override lever to position 1 (closed).

(b)  
Reconnect electrical connector to ground interconnect valve.

(c)  
Close ground interconnect valve circuit breaker on P6 panel.

(d)  
Set parking brake.

(e)  
Place ground interconnect switch to close position.

(f)  
Check that valve manual override lever is in position 1 (closed).

(3)  
Retard thrust levers to idle stop.

(4)  
Remove hydraulic power, if no longer required (Ref 27-51-0).

(5)  
Remove electrical power, if no longer required.
　
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