(2)
Place protractor with adapter on associated thrust lever and set protractor to 0 degree.
(3)
Connect ohmmeter across terminals C and NO of switch (either set of two sets of terminals) and check that switch is not actuated (no continuity through switch).
(4)
Advance associated thrust lever until switch actuates (continuity through switch). Check that thrust lever is 12.5 +1 degrees forward of idle stop.
(5)
If switch does not actuate at correct thrust lever position, adjust position of switch actuating cam.
(6)
Remove ohmmeter and connect electrical wiring to switch terminals.
D. Test warning switch.
(1)
Provide electrical power.
(2)
Provide system A hydraulic power (Ref 27-62-0 MP).
(3)
Check that following circuit breakers on panel P6 are closed:
(a)
AURAL WARNING
(b)
EPR WARNING
(c)
LANDING GEAR LIGHTS
(d)
ENG NO. 1 EPR & L.G. WARNING
(e)
ENG NO. 2 EPR & L.G. WARNING
(4)
Retard both thrust levers to idle stop.
(5)
Make sure the flaps are in a non-takeoff configuration:
(a) Set the flap control lever at zero units.
(6)
Place protractor on associated thrust lever and set protractor to 0 degree.
(7)
Press and hold associated engine EPR test switch on engine accessory module. Check that warning horn does not sound.
(8)
Advance associated thrust lever and check that intermittent horn sounds when thrust lever is 12.5 +1 degrees forward of idle stop.
(9)
Retard thrust lever and check that horn sound stops when thrust lever is 5 degrees (minimum) forward of idle stop.
(10)
Release EPR test switch and retard thrust lever to idle stop.
580
Oct 20/92 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 31-26-22 Page 401
Thrust Lever Actuated Switch Installation 507
31-26-22Page 402 Figure 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Aug 15/77
E. Restore airplane to normal.
(1)
Remove system A hydraulic power (Ref 27-62-0).
(2)
Remove electrical power if no longer required.
(3)
Remove protractor from thrust lever.
507
Feb 01/96 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 31-26-22 Page 403
FLAP TAKEOFF WARNING SWITCH - REMOVAL/INSTALLATION
1. General
A. The flap take off warning switch (S130) is the center switch installed on the flap control unit (Fig. 401). The switch leads make a single wire bundle and must be separated during switch removal, and retied when a new switch is installed.
2. Remove Flap Takeoff Warning Switch (Fig. 401)
A. Open LIGHTS and AURAL WARN circuit breakers on P6 panel.
B. Remove switch cover from flap control unit .
C. Separate wire bundle connector from receptacle.
D. Remove two wire bundle support clamps.
E. Cut wire bundle ties and separate takeoff warning switch leads from remainder of bundle.
F. Remove takeoff warning switch leads from connector.
G. Extract pin to release roller guide.
H. Remove retainer nut from takeoff warning switch and remove switch from control unit.
I. Replace nut, roller guide and pin on switch.
3. Install Flap Takeoff Warning Switch (Fig. 401)
A. Remove pin, roller guide and one retainer nut from switch .
B. Position switch in flap control unit and install retainer nut and roller guide. Install pin to secure roller guide.
C. Install switch leads in connector and connect to receptacle.
D. Replace wire bundle ties.
E. Install two wire bundle support clamps.
F. Close LIGHTS and AURAL WARN circuit breakers on P6 panel.
G. Deleted.
H. Deleted.
I. Deleted.
J. Adjust flap takeoff warning switch, as follows:
(1)
Provide system A hydraulic power (Ref 27-51-0, Maintenance Practices).
(2)
Provide electrical power.
(3)
Check LIGHTS and AURAL WARN circuit breakers on panel P6 are closed.
(4)
Retract the flaps with the flap control lever to their normal retracted position (zero unit detent) and hold for 5 minutes.
(5)
Remove the No. 4 jackscrew fairing and record the X dimension (Fig. 402) between the No. 4 ball screw nut and its upstop.
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