-remove the drain-plug housing and replace the packing (Ref. TASK 49-91-42-400-001).

 (7)
 Examine the gravity oil-filler cap and the filler-housing nut for oil leakage. If oil is found:

 (a)
 in the scupper:

 -replace the filler-cap seal

 (b)
 under the scupper:

 -remove the filler-housing nut and replace the packing.

 (8)
 Examine the fuel pump/oil pump interface for oil leakage. If an oil leakage is found or suspected:

 -remove the fuel pump and replace the packing (Ref. TASK 49-32-11-000-001) and (Ref. TASK 49-32-11-400-001).

 (9)
 Examine the oil pump/gearbox interface for oil leakage. If an oil
 leakage is found or suspected,

 (a) Remove the oil pump and replace:
 -
the oil feed-transfer bobbin packing,

 -
the oil return-transfer bobbin packing,

 -
the gearbox interface packing (Ref. TASK 49-91-45-000-001) and (Ref. TASK 49-91-45-400-001).

 (10)
 Examine the turbine-bearing oil-pressure feed and scavenge fitting (6 o'clock position) for oil leakage. If an oil leakage is found/suspected:

 -
replace the scavenge-tube slip-fitting packing

 -
replace the pressure-tube slip-fitting packing

 -
replace the fitting packing (Ref. TASK 49-91-53-000-001) and (Ref. TASK 49-91-53-400-001).

 (11)
 Examine the turbine-bearing vent-tube assembly for oil leakage. If an oil leackage is found or suspected at:

 (a)
 the turbine-bearing vent-tube assembly:

 -replace the vent-fitting elbow packing.

 (b)
 the check valve/vent fitting:

 -replace the check valve.

 (c)
 the check valve/vent tube:

 -replace the tube (Ref. TASK 49-91-53-000-001) and (Ref. TASK 49-91-53-400-001).

 (12)
 Examine the oil level switch/gearbox interface for oil leakage. If an oil leakage is found or suspected:

 -remove the switch and replace the packing (Ref. TASK 49-93-16-000-001) and (Ref. TASK 49-93-16-400-001).

 (13)
 Examine the de-oil solenoid/gearbox interface for oil leakage. If an oil leakage is found or suspected:

 -replace the packing (Ref. TASK 49-91-49-000-001) and (Ref. TASK 49-91-49-400-001).

 (14)
 Examine the oil pressure/temperature assembly for oil leakage. If an oil leakage is found or suspected at:

 (a)
 The oil temperature switch/mount block interface:

 -replace the packing (Ref. TASK 49-94-13-000-001) and (Ref. TASK 49-94-13-400-001).

 (b)
 The oil pressure switch/mount block interface:

 -replace the packing (Ref. TASK 49-94-14-000-001) and (Ref. TASK 49-94-14-400-001).

 (c)
 The mount block or tube unions:

 -replace the assembly (Ref. TASK 49-94-00-000-003) and (Ref. TASK 49-94-00-400-001).

 (15)
 Examine the gearbox regulator-valve assembly for oil leakage. If an oil leakage is found or suspected:

 -
replace the transfer tube packings (10) and (11),

 -
replace the interface packing (2) (Ref. TASK 49-26-53-000-001) and (Ref. TASK 49-26-53-400-001).

 Subtask 49-00-00-210-062
 G. Examine the APU external lubrication-tubes for leaks. If an oil leak is found or suspected do a check of the B-nut torque values. Use the tables from 1 to 5.
 Torque Values for External Lubrication Tubes
 Table 1 - LOP/HOT Switch and Manifold Assembly Forward of Oil Cooler ---------------------------------------------------------------------------
TUBE LOC/DESCRIPTION ------------------------- B-NUT LOCATION ------------------------ TORQUE VALUE--------------------------
LOP Switch manifold to  at LOP Manifold  1.53 to 2.15 m.daN
 starter clutch oil jet  (135 to 190 lbs.in.)
 fitting.  ---------------------------------------------
at Starter Clutch  1.53 to 1.64 m.daN
 ------------------------- (135 to 145 lbs.in.)--------------------------------------------------
LOP Switch manifold to  at LOP Manifold  1.53 to 2.15 m.daN
 turbine bearing cavity  (135 to 190 lbs.in.)
 vent tube fitting.  ---------------------------------------------
at Turbine Bearing  1.53 to 2.15 m.daN
 ------------------------- vent ------------------------- (135 to 190 lbs.in.)-------------------------
LOP Switch manifold to  at LOP Manifold  1.53 to 2.15 m.daN
 turbine bearing oil  (135 to 190 lbs.in.)
　
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