737-300 400 500 AMM 飞机维护手册 ENGINE 发动机 1(96)

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 (b)  Find out if the weight location is on a screw hole or between 2
 screw holes.  Find the location (Fig. 507).
 (c)  Get the part numbers of the balancing screws .
 NOTE:____ Figures 508 and 509 will give the correct weights if
 the location is at a screw hole or if the location is
 between 2 screw holes.
 (d)  Write the balancing screws you used and their location in a
 balance screw location chart (Fig. 502).

 S 965-015-C00
 (22) Replace the balance screws that you installed before with the initial screws that you wrote on Fig. 502.
 NOTE: The torque value for the balancing screws is
____ 70-75 pound-inches (8.0-8.5 Newton meters).
 S 735-017-C00
 (23) See if the vibration levels of the No. 1 bearing (or FFCCV) are not more than 3.5 mils DA and the levels of the TRF are not more than
 4.0 mils DA.
 (a)  
If the vibration levels are not more than the limits, the trim balance procedure is completed. 1) Do this subsequent task: Put the Airplane Back to Its

 Usual Condition.

 (b)  
If the vibration levels are more than the limits, do the intervectorial analysis.

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S-M56-MM-01935-04-B

SENSITIVITY VALUE WITH THE ENGINE SOFT MOUNTING (LORD) PHASE LAG WITH THE SPECTRAL DYNAMIC ANALYZER
Analyzer Method Worksheet
Figure 511

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E06674
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MACHINED MARK/INDEX FOR THE NO. 1 FAN BLADE

Calculation of Phase Lag and Sensitivity (Example)
Figure 512

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A 737-300/400/500MAINTENANCE MANUAL
MACHINED MARK/INDEX FOR THE NO. 1 FAN BLADE
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280
80
270

90
260
100
190 170
180
S-M65-MM-02461-00-B
Vectorial Analysis Figure 513
E03749
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 Intervectorial Analysis Record Worksheet
Figure 514

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S-M56-MM-1937-(1)-00-B -01-B
Intervectorial Analysis (Example) Figure 515
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