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72-54-00
ALL ú ú C02 Page 613 ú Nov 15/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(b) If you can not remove the borescope plug, the engine is not serviceable. 1) A maximum service extension of 10 cycles is permitted.
S 426-041-C00
(6) Install the 3rd-stage borescope plug as follows:
(a)
Apply a light layer of grease (CP2101) on the borescope plug threads and the mating surfaces.
(b)
Clean the borescope port threads with a soft wire brush.
(c)
Install the plug in the port.
CAUTION: WHEN YOU INSTALL THE BORESCOPE PLUG, DO NOT APPLY MORE
_______ THAN THE GIVEN TORQUE. DAMAGE TO THE ENGINE CAN OCCUR.
(d) Tighten the plug to 57-63 pound-inches (6.4-7.1 Newton meters).
NOTE: If the plug does not install and seat correctly,
____ remove the plug and examine it for unwanted contamination.
(e) Install lockwire to the plug.
H. LPT Ring Sector Support Inspection
S 216-024-C00
(1) Examine the support for cracks (Fig. 601):
(a) All cracks on the parts are permitted if they are attached and connected.
I. Angle Brackets on the LPT Case Inspection
S 216-025-C00
(1) Examine the angle brackets for broken brackets (Fig. 601):
(a)
Brackets that are broken are not serviceable.
(b)
Replace the broken brackets in 30 hours or 30 cycles (AMM 72-54-00/801).
J. Cooling Air Manifold Inspection
S 216-026-C00
(1) Examine the manifold for forward or aft mounting lugs that are cracked or broken (Fig. 601):
(a) One crack for each lug, not more than 0.2 inch (5.1 mm) in length is permitted.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
72-54-00
ALL ú ú C02 Page 614 ú Nov 15/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(b) A maximum service extension of 30 hours or 30 cycles is permitted for broken lugs and cracks that are more than
0.2 inch (5.1 mm) in length.
S 216-027-C00
(2) Examine the manifold for cracks in the sheet metal (Fig. 601):
(a) All cracks are permitted if they are not more than 0.50 inch
(12.70) mm) in length, with a maximum cumulative length of
3.0 inches (76.0 mm) and with a minimum distance of 1.0 inch
(25.4 mm) between each crack.
S 216-028-C00
(3) Examine the manifold for dents (Fig. 601):
(a) All dents are permitted if they are not more than 0.030 inch
(0.80 mm) in depth with a smooth contour.
K. Tube Supports for the Cooling Air Tubes Inspection
S 216-029-C00
(1) Examine the tube supports for cracks at the mounting flanges (Fig. 601):
(a) All cracks are permitted if the supports are connected.
S 216-030-C00
(2) Examine the tube supports for cracks in all other areas (Fig. 601):
(a) All cracks are permitted if the tubes and fasteners are connected.
L. Heat Shield Inspection
S 216-031-C00
(1) Examine for broken heat shields (Fig. 601):
(a)
Broken heat shields are not serviceable.
(b)
Replace the heat shield before 30 hours or 30 cycles (AMM 72-54-00/801).
S 216-032-C00
(2) Examine the heat shield for cracks at the mounting flanges:
(a) All cracks are permitted if the heat shield is connected.
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