-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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