(c)
Check that oil level in the CSD wet pad spline cavity is not overfilled by removing the pressure seal fitting cap on the engine gearcase and allowing oil to flow from the standpipe indicator inside the cavity. When oil stops flowing, the spline cavity is filled to the proper level. For servicing the engine oil tank, the constant speed drive, or the CSD wet pad spline cavity, refer to Chapter 12, Servicing.
(3)
Check engine oil system as follows:
(a)
Check fuel/oil cooler, oil pressure transmitter, low oil pressure switch and oil filter bypass switch for leaks, loose mounting bolts and loose oil line connections. Check mounting brackets for cracks and hoses for chafing.
(b)
Check oil tank for evidence of leakage, loose or cracked mount strap, and security of tank fittings and drain valve. Check filler cap for positive locking, deteriorated seals or a broken chain.
(c)
Check engine external oil lines for signs of leaks and security of connections and clamps.
(d)
Check gearcase breather for security and obstructions.
(4)
Check compressor section as follows:
(a)
Using a strong light, mirror, magnifying glass, and the latest available nondestructive inspection methods, inspect inlet case, inlet guide vanes, front bearing support, and all visible compressor blades for nicks, dents, cracks, corrosion, and foreign object damage.
NOTE: If compressor or fan blades are damaged, refer to Engine, Chapter 72, for allowable limits and remedial action.
(b)
Check that inlet pressure probe (Pt2) in nose dome, and inlet pressure and
temperature probes in casing are not loose, dented, or blocked.
(5)
Check the following exhaust section components:
(a)
Check exhaust cone, nozzle and struts for visible evidence of cracks, dents, and buckling.
(b)
Check fourth stage turbine blades and trailing edge of nozzle guide vanes for warpage, cracks, nicks and erosion.
(c)
Check turbine exhaust area for local burnt spots and cracks.
(d)
Check rear fan case for burnt spots and/or scoring caused by blade rub or foreign object damage.
(e)
Look in engine aft end and check tailpipe interior for evidence of metalizing from blade and stator interference.
(f)
Check exhaust section for oil accumulation.
(6)
Check thrust reverser as follows: (See figure 601)
5E4
71-00 Page 602 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Jun 20/89
501
Jun 20/83 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 71-00 Page 603
WARNING: TO PREVENT POSSIBLE INJURY TO PERSONNEL, ENSURE THAT THE THRUST REVERSER SYSTEM IS DEACTIVATED AND APPROPRIATELY TAGGED BEFORE EXAMINING THRUST REVERSER COMPONENTS. REFER TO EXHAUST, CHAPTER 78
(a)
Check the thrust reverser frame for cracks, dents and distortion.
(b)
Check deflector door linkage and attaching fittings for cracks, distortion and security of installation.
(c)
Check deflector door inner and outer panel skins for cracks, dents, punctures or missing pieces. Check for separation of inner and outer skins from flanges on edges of panels. Check for loose or missing rivets.
(d)
Check aft fairing and actuator housing for cracks.
(e)
Check tailpipe for cracks, dents, distortions and hot spots.
(f)
Check locking mechanism for cracks and security of installation. Check latch for wear.
(g)
Check tailpipe extension for cracks, dents and distortions. Check for loose or missing attaching bolts. Check bonded brackets for security of mounting.
(h)
Check hydraulic lines and actuators for leaks.
(i)
If cracks or other damage are found in any thrust reverser components., refer to Exhaust, Chapter 78, for allowable limits and remedial action.
Thrust Reverser Details 506
71-00Page 604 Figure 601 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Feb 15/70
(7)
Check the following exhaust indicating systems. Access to thermocouple probes is gained through the engine tailpipe.
(a)
Check exhaust gas temperature harness and lead for evidence of physical damage to stainless steel braid, glass fiber sleeving, and terminals. Check for rupture or severe fraying, and for loose conductor strands at any terminal.
(b)
Check EGT thermocouple probes for nicks, cracks, bending or evidence of heat erosion. Check probes for looseness.
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