737-300 400 500 AMM 飞机维护手册 ENGINE 发动机 1(20)

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 (a)  If you have problems with the S7, S8 or S9 borescope plugs, do these steps:
 NOTE: The S7, S8 and S9 plug assemblies have a cap in the
____ outer stator case which is connected by a shaft to the inner stator case. The cap is held on the plug by a retaining ring. To permit removal, the plug has splines on the shaft that engage the cap.
 CAUTION: WHEN YOU REMOVE THE BORESCOPE PLUG, DO NOT TORQUE THE
_______ PLUG TO MORE THAN 280 POUND-INCHES (31.5 N.m). THE BORESCOPE PLUG CAN BREAK. THIS CAN CAUSE DAMAGE TO THE ENGINE.
 1)  If the borescope plugs do not come loose at 280 pound-inches (31.5 N.m) or less of torque, do these steps: a) Remove the retaining ring, borescope cap, spring and
 guide pin. b) Remove the plug with a deep socket and a 3/8-inch drive wrench (Fig. 605).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
HPC Blades (1st- thru 9th-Stages) - Inspection
______________________________________________ c) Assemble and use the borescope plug again, if it is not damaged. 2) If the borescope plug breaks, do the steps that follow: a) Remove all the pieces that fall between the inner and outer cases. b) Remove the plug with a deep socket and a 3/8-inch drive wrench (Fig. 605).
 S 216-015-C00
 (4)  When you examine the 6th- thru 9th-stage rotor blades, and the vane segments have moved to a position to cover the borescope holes, do these steps as follows:
 (a)
If the diameter of the borescope holes are larger than

 0.24 inch (6 mm), use the 0.24 inch (6 mm) flexible borescope.

 (b)  
If the diameter of the borescope holes are less than 0.24 inch (6 mm), do these steps: 1) Put a locally available alignment rod in the hole for the

 vane segment. 2) Apply a light, downward force on the end of the rod to move the vane up in the case.
 NOTE: The aluminum rod has a diameter of
____
 0.375 inch (9.93 mm), with a length of 18 inches (460 mm). There is a 4 inch (100 mm) taper at one end. Because of this taper, the diameter of the rod decreases to 0.062 inch (1.6 mm) at that end Fig. 605).
 (c)  If the 7th-stage borescope hole is closed, do a borescope inspection of the aft end of the compressor through the 8th- or 6th-stage blades, in that sequence. 1) Do a borescope inspection of the aft end of the compressor
 through the 8th- or 6th-stage blades, in that sequence.
 S 486-016-C00
 (5)  Use the applicable rigid borescope (with a 90° right angle viewer and a 60° field of vision), and install it in the applicable borescope hole (Fig. 605).
 NOTE: To get access at the SIGV borescope port, put the borescope
____ in the cooling air hole in the inner flange of the extension ring.
 S 986-017-C00
 (6)  Turn the N2 rotor.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
PORT LOCATION
STATOR STAGE 1 2
 3A A
4 5 6 7 8 9
SEE C
ROTOR BLADE VISIBLE
STG 1 LEADING EDGE
STG 1 TRAILING EDGE STG 2 LEADING EDGE
STG 2 TRAILING EDGE STG 3 LEADING EDGE
STG 3 TRAILING EDGE STG 4 LEADING EDGE
STG 4 TRAILING EDGE STG 5 LEADING EDGE
STG 5 TRAILING EDGE STG 6 LEADING EDGE
STG 6 TRAILING EDGE STG 7 LEADING EDGE
STG 7 TRAILING EDGE STG 8 LEADING EDGE
STG 8 TRAILING EDGE STG 9 LEADING EDGE
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CFM56 ENGINES
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BORESCOPE PORT SIZE 10 mm 8 mm 10 mm 8 mm10 mm 10 mm 8 mm 8 mm 8 mm
10 mm 8 mm 10 mm 10 mm 10 mm 8 mm 8 mm 8 mm 8 mm
IGV 1 23
4 5 6 7 8 9
SEE D
A-A  G-M56-MM-0002(1)-04-B
High Pressure Compressor Rotor Borescope Inspection Figure 605 (Sheet 1)
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