(e)
Slowly advance engine No. 1 thrust lever. Check that intermittnt horn sounds before pilot's EPR indicator reads 1.48 maximum.
(f)
Slowly retard thrust lever. Check that horn is silenced before EPR indicator reads
1.32 minimum.
(g)
Return thrust lever to idle stop.
NOTE: Below approximately -20°F (-29°C), an indicated EPR of 1.48 may be commanded before the thrust lever reaches 13.5 degrees from idle stop, depending on the engine model installed. Under these conditions, the intermittent horn will sound at 13.5 degrees maximum thrust lever travel from idle stop and the indicated EPR may exceed 1.48.
(h)
Repeat steps (e) thru (g) using engine No. 2.
(i)
Shut down engines (Ref Chapter 71).
501
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502
31-26-0 Page 528 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Oct 20/93
NOTE: The remaining tests in par. (4) thru (8) are performed with engines not running.
(4)
Test Thrust Lever Actuated Takeoff Warning Switches (S283, S133).
(a)
Verify both thrust levers are at idle stop.
(b)
Place protractor with adapter on No. 1 thrust lever and set protractor to zero degree (Fig. 501).
(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
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BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.
(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.
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