(4)
Close the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-410-001).
(5)
Remove the access platform(s). Subtask 49-20-00-860-063
B.
Aircraft Maintenance Configuration
(1)
Pressurize the reservoirs of the hydraulic systems.
(Ref. TASK 29-14-00-614-002).
(2)
De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-861-002).
ENGINE - REPAIRS
________________
TASK 49-20-00-340-001
Bonding of the Pins on the Accoustic Bulkhead (APS 3200)
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s) No specific soldering iron (powered by isolating transformer or battery) No specific access platform 3.5 m (11 ft. 6 in.)
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 08-010 D DA-4-653-3E4 TWO COMPONENT EPOXY ADHESIVE (Ref. 20-31-00)
Material No. 11-004 USA MIL-T-81533 1.1.1TRICHLOROETHANE (METHYL CHLOROFORM) (Ref. 20-31-00)
C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied
from the External Power 29-14-00-614-001 Depressurization of the Hydraulic Reservoirs 29-14-00-614-002 Pressurization of the Hydraulic Reservoirs through
the Ground Connector 52-41-00-010-001 Open the APU Doors for Access 52-41-00-410-001 Close the APU Doors after Access 49-20-00-991-008 Fig. 801
3. Job Set-up
__________
Subtask 49-20-00-860-060
A. Aircraft Maintenance Configuration
(1)
Put the warning notice on panel 25VU to tell persons not to start the APU.
(2)
Energize the ground service network
(Ref. TASK 24-41-00-861-002).
(3)
Make sure that hydraulic systems are depressurized
(Ref. TASK 29-14-00-614-001).
Subtask 49-20-00-865-079
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
Subtask 49-20-00-010-063
C. Get Access
(1)
Put the access platform in position below the APU access doors 315AL, 316AR.
(2)
Open the APU access doors 315AL and 316AR (Ref. TASK 52-41-00-010-001).
(3)
Set the light switch 11LJ to on.
4. Procedure
_________
(Ref. Fig. 801/TASK 49-20-00-991-008) Subtask 49-20-00-915-050
A. Bonding of the pins on the Accoustic Bulkhead
(1)
Removal of the pins.
(a) Warm up the pins (1) and (2) with soldering iron (powered by isolating transformer or battery) and remove the pins with a tong.
(2)
Prepare the pins for installation. 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)
Clean the pins and the related area of accoustic bulkhead with CLEANING AGENTS (Material No. 11-004).
(b)
Mix the BONDING AND ADHESIVE COMPOUNDS (Material No. 08-010). Obey the manufacture instruction.
(c)
Apply a thin layer of the BONDING AND ADHESIVE COMPOUNDS (Material No. 08-010) to the pins.
(d)
Install the pins.
(e)
Apply pressure to the pins and let it harden. Using a heat lamp. Hardening times as follows:
Bonding of the Pins Figure 801/TASK 49-20-00-991-008
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