(b) Put a warning notice to tell persons not to energize the FADEC 1(2).
Subtask 79-11-10-010-057
B. Open the fan cowl doors: (Ref. TASK 71-13-00-010-040)
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
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4. Procedure
_________
(Ref. Fig. 802/TASK 79-11-10-991-301)
Subtask 79-11-10-020-054
A. Removal of the damaged O-ring from the oil cap assembly
(1) Raise the filler cap handle to the vertical (unlocked) position.
(2) Remove the 4 bolts (10) and washers (20).
(3) Keep the plate (30).
(4) Remove the oil cap assembly (40) from the oil tank, through the scupper (60).
(5) Put the oil cap assembly (40) in a clean container to collect oil drippings.
(6) Remove the O-ring (50) from the groove of the oil cap assembly (40). Discard the O-ring (50).
Subtask 79-11-10-420-054 R B. Installation of the new O-ring (50) on the oil cap assembly
(1) Lubricate a new O-ring (50) with engine oil (Material No. CP2442).
(2) Install the new O-ring (50) in the groove of the oil cap assembly (40).
(3) Make sure that the surfaces are clean before you install the parts.
(4) Install the oil cap assembly (40) in the oil tank, through the scupper (60). Be carefull not to damage the O-ring (50).
(5) Make sure that the oil cap assembly (40) and the scupper (60) are installed in the correct direction.
(6) Lubricate the threads of bolts (10) with graphite grease (Material No. CP2101)
(7) Install the four bolts (10) and washers (20) to attach the plate (30), the oil cap assembly (40) and the scupper (60) to the oil tank.
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Replacement of the Damaged O-ring on the Oil Cap Assembly
Figure 802/TASK 79-11-10-991-301
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(8) TORQUE the bolts (10) to between 100 and 110 lbf.in (1.13 and 1.24 m.daN). ________
5. Close-up
Subtask 79-11-10-410-056
A. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
(2) Close the fan cowl doors: (Ref. TASK 71-13-00-410-040)
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
(3) Remove the warning notice(s).
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E E Feb 01/98 E E ECES E DISTRIBUTION - DESCRIPTION AND OPERATION
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1. General_______ (Ref. Fig. 001) The lubrication functions are provided by the lubrication unit. The lubrication unit provides oil under the required pressure for lubrication of the engine bearings and gears, for scavenge of the oil after lubrication and return to the oil tank. But, before return to the oil tank, the scavenged oil from the engine sumps circulates, successively, through:
- The 4 scavenge screens (in the lubrication unit housing) which provide a first and coarse filtration of the oil scavenged from the AGB, the engine forward bearing sump, the TGB and the engine aft bearing sump.
- The master magnetic chip detector (on the lubrication unit) through which circulates the total scavenged oil flow.
- The servo fuel heater (on the fuel pump housing) (see note below).
NOTE : Though it has its oil circuit connected hydraulically in series with
____ that of the main oil/fuel heat exchanger, the servo fuel heater (Ref. 73-10-00) is not (functionally) a part of the oil distribution system. However, the "piggyback" and scavenge oil circulation arrangement of the servo fuel heater (also a heat exchanger) and main oil/fuel heat exchanger is such that the scavege oil undergoes two levels of cooling before return to tank: the first one takes place in the servo fuel heater; the second, through the main oil/fuel heat exchanger.
The lubrication unit is installed on the right-hand side of the AGB front face.
2. Description___________ (Ref. Fig. 001, 002, 003, 004, 005, 006, 007) The lubrication unit has a single housing containing the following items :
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