4. Procedure
_________ Subtask 49-11-11-420-062
A. Installation of the APU Mount Brackets
(1) Installation the FWD left and the FWD right APU mount-brackets. (Ref. Fig. 202/TASK 49-11-11-991-013)
(a)
Carefully put the FWD APU mount bracket (LH) (3) and the FWD APU mount bracket (RH) (9) in position on the mount pad at the LH/RH side of the APU gearbox. Make sure that the spigot is correctly engaged in the APU.
(b)
Install the 4 bolts (1) at each of the mount bracket.
(c)
TORQUE the bolts (1) to between 2.6 and 3.0 m.daN (19.17 and
22.12 lbf.ft) and safety with MISCELLANEOUS (Material No. 19-010).
(d)
Install the one setscrew (8) at each of the FWD APU mount-bracket
(3) and (9) and lock it in position with the nut (7).
(e)
Remove any contamination from the contact areas of the bonding strap.
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APU on Support Frame
Figure 201/TASK 49-11-11-991-020
CES
Mount Brackets
Figure 202/TASK 49-11-11-991-013
CES
(f)
Install one bonding strap (6), a washer (4) and a nut (5) on each setscrew (8).
(g)
Apply PAINTS FOR DETAIL (INTERNAL AND EXTERN AL) (Material No. 07-020) on the nuts (5) and (7) and the setscrews (8).
(2) Install the rear APU mount-bracket.
(Ref. Fig. 202/TASK 49-11-11-991-013)
(a)
Carefully put the rear APU mount bracket (2) in position on the rear mount pad.
(b)
Attach the rear APU mount-bracket (2) to the APU with the 4 bolts (1).
(c)
TORQUE the bolts (1) to between 2.6 and 3.0 m.daN (19.17 and
22.12 lbf.ft) and safety with MISCELLANEOUS (Material No. 19-010).
Subtask 49-11-11-420-063
B. Installation of the APU Generator
(Ref. Fig. 203/TASK 49-11-11-991-014)
(1) Installation of the Seal Plate.
(a)
Lubricate the seals (29) and (30) of the new seal plate (23) with a thin layer of OILS (Material No. 03-002).
(b)
Position the seal plate (23) with the seal (29) for the oil scavenge port in the 6 o'clock position on the flange of the APU generator (21).
NOTE : Make sure that the dowel pin (28) engages correctly with
____
the pilot hole (27).
(c) Lubricate the countersunk screws (26) with OILS (Material No. 03-002) and install the countersunk screws (26).
(2) Installation of the APU Generator
(a) Lubricate the new packing (22) and the new seal (25) with a thin layer of OILS (Material No. 03-002)
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AC-Generator
Figure 203/TASK 49-11-11-991-014
CES (b) Install the Generator
WARNING : DO NOT CAUSE DAMAGE TO THE THREADS OF THE SET SCREWS
_______ WHEN YOU REMOVE OR INSTALL THE GENERATOR. THE GENERATOR WEIGHS APPROXIMATELY 23kg (50.7lb).
-install the new seal (25) on the generator splined drive shaft and the new preformed packing (22) on the generator mount flange.
(c)
Install the generator (21) over the nuts (24) and turn it clockwise to engage the slots.
(d)
Make sure that the dowel pin (28) fully engages in the mounting flange of the accessory drive gearbox.
(e)
TORQUE the nuts (24) to between 3.9 and 4.4 m.daN (28.76 and
32.44 lbf.ft).
(f)
TORQUE the nuts (24) behind the generator terminal with an ADAPTER - TORQUE.
(g)
Cleaning
WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER
_______ SPECIAL MATERIALS ONLY WITH A GOOD SUPPLY OF AIR. OBEY THE MANUFACTURERS INSTRUCTIONS. PUT ON PROTECTIVE CLOTHING. DO NOT GET THEM IN YOUR MOUTH. DO NOT SMOKE. DO NOT BREATHE THE GAS. THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.
-clean the nuts (24) of the APU generator with CLEANING AGENTS (Material No. 11-004).
(h) Mark the tightened generator nuts (24) with PAINTS FOR DETAIL (INTERNAL AND EXTERN AL) (Material No. 07-560).
5. Close-up
________
Subtask 49-11-11-860-067
A. The APU is now ready for installation (Ref. TASK 49-11-11-400-004).
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POWER PLANT - MAINTENANCE PRACTICES
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