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 TASK 72-23-00-300-043

 Repair of the Abradable (material) Shroud with Circular Patches
 CAUTION : THIS REPAIR MUST NOT BE DONE IN A HUMID ATMOSPHERE. THIS COULD AFFECT
_______ THE QUALITY OF THE BONDING COMPOUND. THE MINIMUM AMBIENT TEMPERATURE MUST BE 60 DEG.F (15 DEG.C).
 1. Reason for the Job
__________________
 General Defect more than 0.12 in. (3 mm) deep and 0.50 in.2 (3.2 cm2) and with fan case base metal exposed. This task refers to a procedure for the in-place of the abradable shroud by installation of circular patches 1.968 in. (50 mm) maximum diameter.
 NOTE : The following patch repair is estimated to take less than 3 hours in
____ the hangar when done by skilled mechanics familiarized with the procedure.
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific clean, white cloth
 No specific heat gun or infrared lamp or heatings panels
 No specific paint brush
 No specific protective mats
 No specific scalpel
 No specific vacuum cleaner
 No specific warning notice
 No specific access platform 0.5 m (1 ft. 8 in.)

 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. CP1039 *
 acetone (Ref. 70-30-00)
 Material No. CP1041 *

 isopropyl alcohol (Ref. 70-30-00) R Material No. CP2011 * R stoddard solvent (Ref. 70-30-00)
 Material No. CP2239  *
 abrasive cloth 3 M 301D grit size 80 or 120
 (Ref. 70-30-00)

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 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------

Material No.  CP2244 
Material No.  CP2297 
Material No.  CP2298 
Material No.  CP2306 
Material No.  CP2339 
R  Material No.  CP2559 
R 
R  Material No.  CP2560 
R 
R  Material No.  CP2566 
R 
R  Material No.  CP2584 
R 
R  Material No.  CP2656 
R 

*
 Primer 1200 (Ref. 70-30-00)
*
 base RTV 147 A (Ref. 70-30-00)
*
 catalyst (hardener) RTV 147B (black color)
 (Ref. 70-30-00)
*
 heat-resistant tape 3 M No. 5490 (Ref. 70-30-00)
*
 RTV 630 (Ref. 70-30-00)
*
ardrox 552 (Ref. 70-30-00)
*
turco ind 79 (Ref. 70-30-00)
*
mag-chem teksol (Ref. 70-30-00)
*
degreasol 99 R (Ref. 70-30-00)
*
mag-chem skysol (Ref. 70-30-00)

 C. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
72-21-00-000-005  Removal of the Spinner Front Cone
 72-21-00-000-006  Removal of the Spinner Rear Cone
 72-21-00-000-007  Removal of the Fan Rotor Blades
 72-21-00-400-005  Installation of the Spinner Front Cone
 72-21-00-400-006  Installation of the Spinner Rear Cone
 72-21-00-400-007  Installation of the Fan Rotor Blades
 72-23-00-991-317  Fig. 803
 3. Job Set-up__________
 Subtask 72-23-00-941-088
 A. Safety Precautions

 (1) On the center pedestal, on the ENG panel 115VU:

 (a) Put a warning notice to tell persons not to start the engine.

 (2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.

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 (3) On the overhead maintenance panel 50VU:

 (a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.

 (b) Put a warning notice to tell persons not to energize the FADEC 1(2).
　
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