ARMY TM 9-2815-260-24 AIR FORCE TO 38G1-126-2 MARINE CORPS TM 09244A/09245A-24 4-40 (5) Inspect turbine housing outlet and turbine wheel. NOTE Foreign object damage can be difficult to see.  Provide adequate lighting to insure that damage is not overlooked. (a) Check blades inside turbine housing outlet Figure 4-37 for foreign object damage.   Foreign object damage indicates an engine problem is likely. FIGURE 4-37.  TURBOCHARGER INSPECTION POINTS (b) Inspect wheel blades and housing for evidence of wheel rub.  Wheel rub can bend the tips of wheel blades and cause wear or damage to the housing. NOTE Note location and source of any oil leaks found. (6) Inspect outside of center housing, connections to the compressor, and turbine housing for oil. (7) Inspect internal center housing. NOTE Foreign object damage can be difficult to see.  Provide adequate lighting to insure that damage is not overlooked. (a) Look through oil return hole Figure 4-38 to check condition of shaft and bearings.  There should not be excess carbon deposits on shaft or in housing.