737-300 400 500 AMM 飞机维护手册 ENGINE 发动机 1(41)_航空信息_民用航空_通用航空

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(b) Surface condition.
1) Distortions or signs of burns or melted surfaces are
permitted if the missing material limits are not exceeded.
2) There is no maximum limit to the quantity of the CODEP
coating material that is missing.
3) Contamination on the leading edge due to dirt or other
enviromental objects is permitted.
(c) Axial cracks in the nose or gill holes in area A
1) No maximum number of cracks if they are less than
0.05 inch (1.27 mm) and they do not connect more than two
holes.
2) A maximum service extension of 75 cycles is permitted if
the cracks are less than 0.10 inch (2.5 mm) in length and
do not connect more than two holes.
(d) Axial cracks in the nose or gill holes in areas B and C.
1) No maximum number of cracks if they are less than 0.03 inch
(0.8 mm) in length and they do not connect more than two
holes.
2) A maximum service extension of 75 cycles is permitted if
the cracks are less than 0.05 inch (1.3 mm) in length.
(e) Radial cracks in the nose or gill holes in area A or B
1) No maximum limit if the cracks are less than 0.03 inch (0.8
mm) in length and they do not connect more than two holes.
2) A maximum service extension of 10 cycles is permitted if
the cracks are less than 0.06 inch (1.5 mm) in length and
do not connect more than two holes.
(f) Radial cracks in the nose or the gill holes in area C are not
serviceable.
1) A maximum service extension of 10 cycles is permitted if
the cracks are less than a length of 0.03 inch (0.8 mm).
(g) Other axial and radial cracks in areas A and B
1) No maximum number of cracks if they are not more than
0.04 inch (1.02 mm) in length.

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72-00-00
ALL ú ú C01.1 Page 670 ú Jul 12/02
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
HPT Blades and Shrouds and 1st-Stage LPT NGV's - Inspection
___________________________________________________________
2) A maximum service extension of 10 cycles is permitted if
the cracks are less than 0.10 inch (2.5 mm) in length and
the cracks do no connect more than two holes.
(h) Other axial and radial cracks in area C or the root radius are
not permitted.
(i) There is no limit to the quantity of nicks and dents in areas A
and B.
(j) Nicks and dents in area C and the root radius are permitted if
these conditions are obeyed:
1) They are less than 0.05 inch (1.3 mm) in length
2) They are a minimum separation of 0.125 inch (3.18 mm)
3) There is no material that has cracks or is torn.
ú (k) There is no limit for casting lines on the platform or leading
ú edge root fillet area of the blade.
S 216-103-C00
(4) Examine the blade tip, concave side and convex side in the areas not
seen from the aft side with the rigid borescope.
(a) Use the limits for the HPT blade previously given for the
procedure with the rigid borescope.
S 216-112-C00
(5) Examine the HPT shrouds.
(a) Adjust the flexible borescope in the right igniter port to see
the HPT shrouds.
(b) Use the limits for the HPT shrouds previously given for the
procedure with the rigid borescope.
(c) Install the right spark igniter (AMM 74-21-02/401).
1) Tighten the clamp on the igniter cable.
(d) Examine the HPT shrouds with the flexible borescope in the
spark igniter port on the left side, as follows:
1) Remove the right spark igniter (AMM 74-21-02/401).
2) Examine the HPT shrouds through the igniter port on the
left side.
a) Use the limits for the HPT shrouds previously given for
the procedure with the rigid borescope.