(3)  
Location Zones
 101 Flight Compartment, LH
 102 Flight Compartment, RH

 B.  Procedure
 S 846-002
 (1)  Prepare for the test:
 (a)  
Start and operate the APU (AMM 49-11-00/201).

 (b)  
Let the engine operation become stable without a load applied.

 (c)  
Set the AC switch on the P5 forward overhead panel to APU GEN.

 (d)  
Make sure the engine operation is stable at a frequency of 405 |5 Hz with no load applied.

 S 756-003
 (2)  Do the test of the EGT control point:
 (a)  
Set the APU BLEED switch on the P5 forward overhead panel to the ON position.

 (b)  
Set the ISOLATION VALVE switch on the P5 forward overhead panel to the OPEN position.

 (c)  
Set the R PACK and L PACK switches on the P5 forward overhead panel to the AUTO position.

 (d)  
After two minutes, set the R PACK and L PACK switches to HIGH.

 (e)  
Add a 100 amp electrical load to the APU electrical generator.

 (f)  
If the maximum permitted temperature for the ETC is set to the recommended temperature of 620°C (1148°F), do these steps: 1) Monitor the APU EGT on the EGT indicator on the P5 forward

 overhead panel. 2) Write the APU EGT shown on the EGT indicator. 3) Compare the APU EGT indication with the value on Table 1. 4) Remove the 100 amp electrical load from the APU electrical
 generator. 5) Set the R PACK and L PACK switches on the P5 forward overhead panel to the OFF position.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH THE ETC ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES /MAINTENANCE MANUAL ////////////////////////
OUTSIDE AIR TEMPERATURE (OAT) VS APU EXHAUST GAS TEMPERATURE (EGT)
1
(`F) OAT  (`C) OAT  (`C) APU EGT 
4 2 0  -17 -16 -18  516 |10 519 |10 521 |10 
10 8 6  -14 -13 -12  524 |10 527 |10 529 |10 
16 14 12  --10 9 -11  532 |10 534 |10 537 |10 
18 20 22  ---6 7 8 540 |10 542 |10 545 |10 
26 24 28  ---4 3 2  548 |10 550 |10 553 |10 
34 32 30  1-0 1  556 |10 558 |10 561 |10 
36 40 38  2 3 4 563 |10 566 |10 569 |10 
46 44 42  8 7 6  571 |10 574 |10 577 |10 
48  9  579 |10 

EGT INDICATION WITH THE APU IN THE FULLY LOADED CONDITION (BOTH A/C PACKS ON HIGH AND A 100 AMP ELECTRICAL LOAD) WITH A T2 BIAS FROM THE ETC (EGT SET-POINT AT 621`C)
Normal Operating Temperatures for a Fully Loaded Condition
Figure 601 (Sheet 1)

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 ú ú 01 Page 602 ú Mar 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
OUTSIDE AIR TEMPERATURE (OAT) VS APU EXHAUST GAS TEMPERATURE (EGT)
1
(`F) OAT (`C) OAT  (`C) APU EGT 
52 50  10 11  580 |10 584 |10 
54 56 58 13 14 12  588 |10 590 |10 592 |10 
60 62 64 17 18 16  595 |10 598 |10 600 |10 
66 68 70 19 20 21  603 |10 606 |10 608 |10 
72 74 76 22 23 24  611 |10 613 |10 616 |10 
78 80 82 26 27 28  619 |10 621 |10 621 |10 
84 86 88 29 30 31  621 |10 621 |10 621 |10 
90 92 94 34 32 33  621 |10 621 |10 621 |10 
96 98 100 37 38 36  621 |10 621 |10 621 |10 
102 104 106  40 41 39  621 |10 621 |10 621 |10 
108 42  621 |10 

Normal Operating Temperatures for a Fully Loaded Condition
Figure 601 (Sheet 2)

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