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of the patch.
(e) Bond the patch. 1 Press strongly all around the little hole to remove unwanted
_ compound and any air below the patch.
2 After the final application, plug the central hole with the
_
cap.
3 Remove the mixture from the part surface with a white cloth
_
before polymerization.
4 Hold the patch in place with heat-resistant tape 3 M No. 5490
_
(Material No. CP2306).
Subtask 72-23-00-350-055
D. Do the Polymerization as follows:
(1) With an heat gun or infrared lamp or heatings panels heat the patch for 2 hours 15 minutes at 158 deg.F (70 deg.C) or 1 hour at 212 deg.F (100 deg.C) to cure the bonding compound.
Subtask 72-23-00-210-065
E. Do a Last Check of the Abradable Liner
(1) When you do the visual check, examine all joints and patch areas to make sure there are no defects as porosity or trapped air bubbles.
(2) If you see defects, you do the repair again. Subtask 72-23-00-320-060
F. Complete the Repair as follows:
(1) Hand finish the abradable liner.
(a) Hand finish the reconditioned area to put it back to the contour and dimensions of the adjacent areas.
(b) Sand lightly with an abrasive cloth 3 M 301D grit size 80 or 120 (Material No. CP2239).
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(2) Remove the abradable material dust and hand sanding residues from the repair area with a vacuum cleaner. ________
5. Close-up
Subtask 72-23-00-410-100
A. Close Access
(1) Make sure that the work area is clean and clear of tool(s) and other items.
(2) Install the fan blades (Ref. TASK 72-21-00-400-007).
(3) Install the spinner rear cone (Ref. TASK 72-21-00-400-006).
(4) Install the spinner front cone (Ref. TASK 72-21-00-400-005).
(5) Remove the mats from the lower half from the inlet cowl.
(6) Remove the access platform(s).
(7) Remove the warning notice(s).
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TASK 72-23-00-300-044
Repair of Forward, Mid and Aft Acoustical Panels when Missing Cup
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific warning notice
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. CP1040 * methyl-ethyl-ketone (Ref. 70-30-00) Material No. CP2242 * RTV732 (Ref. 70-30-00) Material No. CP2266 * R RTV102 (Ref. 70-30-00) Material No. CP2431 * RTV730 (Ref. 70-30-00)
C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
72-23-00-000-009 Removal of the Forward Acoustical Panels of the Fan 72-23-00-000-025 Removal of the Mid Acoustical Panels 72-23-00-000-026 Removal of the Aft Acoustical Panels 72-23-00-400-009 Installation of the Forward Acoustical Panels of the
Fan
72-23-00-400-025 Installation of the Mid Acoustical Panels
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