R (60) and to the fuel hose (200) as follows :
R (a) Make sure that the mating faces are clean.
R (b) Lubricate the gasket (160) with engine oil (Material No. CP2442).
R (c) Lubricate the threads of the bolts (185) with graphite grease (Material No. CP2101).
R NOTE : Make sure that the bolts (185) removed are serviceable, to
____ R correctly attach the FUEL IN tube (40) to the port.
R (d) Install the gasket (160) in sandwich between the tube (40) and R the exchanger (60). Put the bracket at its correct position above R the square flange of the tube (40) and install the bolts (185) to R attach the tube (40) to the exchanger (60).
R (e) Tighten the bolts (185) as follows:
R NOTE : You must apply the following steps at each of the 4 bolts
____
R (185). Start by the first bolt on the top left side of the
R port, followed by the second bolt at the diagonally
R opposite location, the third bolt on the bottom left side
R of the port and the fourth bolt at the diagonally opposite
R location.
R 1_ TORQUE the bolts (185) to between 0.45 and 0.50 m.daN (39.82
R and 44.24 lbf.in).
R 2_ Unscrew the bolts (185) but do not remove them.
R 3_ Measure the LOCKING TORQUE of each bolt (185). This TORQUE
R must be to between 0.023 and 0.17 m.daN (2.03 and 15.04
R lbf.in); if not, replace the bolt.
R 4_ TORQUE the bolts (185) again to between 0.45 and 0.50 m.daN
R (39.82 and 44.24 lbf.in).
R 5_ Add the LOCKING TORQUE value of the bolts (180) recorded
R before.
R 6_ FINAL TORQUE the bolts (185) to between 0.473 and 0.67 m.daN
R (41.85 and 59.29 lbf.in).
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R (f) Connect the other end of the tube (40) to the fuel hose (200). R Tighten the coupling nut (10) by hand. R R END OF CFM SB 72-0515 and CFM SB 79-0022 R
R (12) Connect the fuel tube (50) to the fuel pump nipple (250) and to the fuel tube to FRV (270). Tighten the coupling nuts (260) and (230) by hand.
R (13) Attach the FUEL IN tube (40) and the fuel tube (50) to the bracket
(20) as follows:
R (a) Put the plastic bushing (190) and clamp (30) in their correct R position and in line with the lower side of the bracket (20), R this for tube (40).
R (b) Put the plastic bushing (240) and clamp (230) in their correct R position and in line with the upper side of the bracket (20), R this for tube (50).
R (c) Engage the bolt (210) from the lower side of the bracket (20) and R attach the 3 clamps (30), (230) and a third clamp (which shares R the same attachment) with the nut (220). TORQUE the nut (220) to R between 0.56 and 0.62 m.daN (49.55 and 54.86 lbf.in).
R (14) TORQUE the coupling nuts.
CAUTION : USE 2 WRENCHES TO REMOVE OR INSTALL THE TUBE COUPLING NUTS.
_______ ONE WRENCH TO HOLD THE UNION AND ONE TO LOOSEN OR TIGHTEN THE COUPLING NUT. THIS WILL PREVENT DAMAGE TO THE HARDWARE.
R (a) TORQUE the coupling nuts (90), (10), (260) and (230) to between R 5.08 and 6.21 m.daN (450 and 550 lbf.in).
R (15) Install the servo-fuel heater (Ref. TASK 73-11-20-400-002).
Subtask 79-21-20-869-051
B. Make sure that the work area is clean and clear of tool(s) and other items.
Subtask 79-21-20-942-050
C. Remove the warning notice(s).
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Subtask 79-21-20-710-051
R D. Do a minimum idle check (Ref. TASK 71-00-00-710-006) and make sure that R there is no leak (Ref. TASK 79-00-00-210-003).
5. Close-up
________
Subtask 79-21-20-410-055
A. Install the fan zone fire detector, loops A and B (Ref. TASK 26-12-15-400-042).
Subtask 79-21-20-410-054
B. Close the fan cowl doors: (Ref. TASK 71-13-00-410-040)
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
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MAIN OIL/FUEL HEAT EXCHANGER - INSPECTION/CHECK
_______________________________________________ TASK 79-21-20-210-002 Inspection/Check of the Main Oil/Fuel Heat Exchanger
1. Reason for the Job
__________________
Self Explanatory
