(c)
Press and hold engine No. 1 EPR test switch on engine accessory module. Check that warning horn does not sound.
(d)
Advance No. 1 thrust lever and check that intermittent horn sounds when thrust lever is 12.5 +1 degrees forward of idle stop.
(e)
Retard thrust lever and check that horn sound stops when thrust lever is 5 degrees (minimum) forward of idle stop.
(f)
Release EPR test switch and fully retard thrust lever.
(g)
Repeat steps (b) thru (f) for engine No. 2.
(5)
Test Flap Takeoff Warning Switch
(a)
Place thrust levers at maximum forward thrust position.
(b)
Press and hold either EPR test switch on the engine accessory module. Check that the intermittent horn sounds and the EITHER EPR greater than 1.4 light illuminates.
(c)
Move the flap handle thru full travel. Check that the intermittent horn sounds for all positions except between the 1 unit detent and the 25-unit detent.
(d)
Return the flap handle to zero detent and release the EPR test switch. Check that the horn is silenced and the EPR light goes off. Retard thrust levers to idle stop.
(6)
Test Stabilizer Takeoff Warning Switches
(a)
Place thrust levers at maximum forward thrust position.
(b)
Set flap control lever to any position between 1 and 25 units.
(c)
Press and hold either EPR test switch on engine accessory unit and check that intermittent horn does not sound.
(d)
Starting within green band range, move stabilizer in APL NOSE DOWN direction.
(e)
Check that intermittent horn sounds when stabilizer position pointer is within + one-half unit of green band.
(f)
Move stabilizer in APL NOSE UP direction and check that horn is silenced when stabilizer position pointer is within + one-half unit of end of green band.
(g)
Continue to move stabilizer in APL NOSE UP direction to other end of green band.
(h)
Check that warning horn sounds when stabilizer position pointer is within + one-half unit of end of green hand.
(i)
Move stabilizer in APL NOSE DOWN direction and check that horn is silenced when stabilizer position pointer is within + one-half unit of end of green band.
(j)
Release EPR test switch, return stabilizer position pointer to center of green band, and set flap control lever to zero units. Retard thrust levers to idle stop.
May 01/00 31-26-0
(7) Test Speed Brake Takeoff Warning Switch (S129 or S651)
NOTE: See Detail D, Fig. 502 for effectivity of switches S129 and S651.
(a)
Place flaps between 1 and 25 units.
(b)
Advance thrust levers to maximum forward thrust position.
(c)
Press and hold ENGINE NO. 1 EPR test switch on the engine accessory module. Check that the warning horn does not sound.
(d)
On switch S129, pull speed brake lever aft to the ARMED detent. Check that warning horn sounds. Return speed brake lever to down position and check that horn stops.
(e)
On switch S651, lift speed brake lever up from bottom of DN detent but do not move lever aft; then, depress lever back into detent. Check that horn sounds when lever is lifted from detent and stops when lever is returned to DN detent.
(f)
Release the EPR test switch and return the flaps to zero units. Retard thrust levers to idle stop.
(8)
Test LE & TE Flap Takeoff Warning Functions (Airplanes without LE Warning Test switches)
(a)
Advance thrust levers to maximum forward thrust position.
(b)
Press and hold either EPR test switch on engine accessory module. Check that intermittent horn sounds.
(c)
Move TE flap lever to 1 unit detent. Check that LE and TE flaps extend and horn is silenced.
(d)
Install leading edge locks on flap actuators 1 and 4.
NOTE: Depressurize hydraulic system prior to installation and removal of flap actuator locks.
(e)
Insert copper shield between No. 1 LE flap extend sensor and its target plate. Check that LE No. 1 green light goes off, amber light comes on, and horn sounds.
(f)
Repeat step (d) at LE flap extend sensor No. 4.
(g)
Remove copper shield.
(h)
Move flap lever to FLAPS UP detent. Check that LE flaps 1 and 4 remain extended and horn sounds.
(i)
Move flap handle thru its full travel. Check that horn sounds except for flap positions 1 thru 25.
(j)
Move flap handle to any position between 1 and 25. Check that horn is silenced.
