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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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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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