3. Job Set-up
__________
Subtask 49-12-51-860-055
A. Aircraft Maintenance Configuration
(1)
Make sure that the warning notices is on panel 25VU to tell persons not to start the APU.
(2)
Make sure that the ground service network is energized (Ref. TASK 24-41-00-861-002).
(3)
Make sure that the hydraulic systems are depressurized (Ref. TASK 29-00-00-864-001).
(4)
Make sure that the access platform is in position below the access doors 315AL and 316AR.
(5)
Make sure that the APU access doors 315AL, 316AR are open (Ref. TASK 52-41-00-010-001) or removed (Ref. TASK 52-41-21-000-001) and (Ref. TASK 52-41-22-000-001).
(6)
Make sure that the light switch 11LJ is set to on.
Subtask 49-12-51-865-051
B.
Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
4. Procedure
_________
**ON A/C 001-003, 051-061,
(Ref. Fig. 401/TASK 49-12-51-991-001) R **ON A/C 001-003, 051-099, 401-499,
Subtask 49-12-51-210-054
A. Preparation for Installation
(1)
Clean and examine the tie-rods (5), (10) and (11) and the vibration isolator (12) for damage. Use the solvent CLEANING AGENTS (Material No. 11-001) and a fiber-bristled brush.
(2)
Replace the tie-rods and/or the vibration isolator if they are damaged.
(3)
Clean and examine the attachment brackets, the APU mount-bracket (14) and the structure for damage and replace if nescessary.
**ON A/C 001-003, 051-061,
Subtask 49-12-51-420-050
B. Installation of the Vibration Isolator (4035KM)
CAUTION : WHEN YOU REMOVE (INSTALL) THE APU, DISENGAGE (ENGAGE) ALL THE
_______ VIBRATION ISOLATORS AT THE SAME TIME FROM THE APU MOUNT BRACKETS. IF YOU DISENGAGE (ENGAGE) THEM ONE AFTER THE OTHER, THE LOADS WILL NOT BE EQUAL. THIS WILL CAUSE DAMAGE TO THE TIE RODS.
(1) Protective Treatment
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.
(a) Apply SPECIAL MATERIALS (Material No. 05-002) to all mating surfaces. Do not apply it to the bonding straps.
(2)
If removed, install the tie-rods (5), (10) and (11).
(a)
Install the tie-rods (5), (10) and (11) at the brackets.
(b)
Install the bolts (15), the washers (16) and the castle nuts (17).
(c)
Tighten and TORQUE the castle nuts (17) to between to between
0.55 and 0.75 m.daN (48.67 and 66.37 lbf.in) and safety them with the new cotter pin (18)
(d)
Connect the bonding strap (20) at bonding bracket (Ref. TASK 20-28-00-912-004).
(e)
Install the screws (22), the washers (21) and the nuts (19).
(f)
Tighten and TORQUE the nuts (19) to between to between 0.22 and
0.26 m.daN (19.46 and 23.00 lbf.in).
(3)
Install the vibration isolator (12) on the APU mount-bracket (14).
(4)
Install the tie-rods (5), (10) and (11) at the vibration isolator (4035KM) (12).
(5)
Install the bolts (4), and (9), the washers (3) and (8) and the castle nuts (2), and (6).
(6)
Tighten and TORQUE the castle nuts (6) to between 0.3 and 0.35 m.daN
(26.54 and 30.97 lbf.in) and safety them with the cotter pins (7).
(7)
Tighten and TORQUE the castle nuts (2) to between 0.55 and 0.75 m.daN
(48.67 and 66.37 lbf.in) and safety them with the new cotter pins (1).
(8)
Remove the PROTECTOR - THREADS, APU MOUNTING BOLTS and install the nut (13).
(9)
Tighten and TORQUE the nut (13) to between 2.5 and 3.1 m.daN (18.43 and 22.86 lbf.ft)
R **ON A/C 062-099, 401-499,
Subtask 49-12-51-420-050-A
B. Installation of the Vibration Isolator (4035KM)
CAUTION : WHEN YOU REMOVE (INSTALL) THE APU, DISENGAGE (ENGAGE) ALL THE
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