E 56-5B E E E TASK 72-52-00-290-001- 01

 Borescope Inspection of the High-Pressure Turbine Blades (from the rear)
 1. Reason for the Job
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 Refer to the MPD TASK: 725000-C1 This TASK is applicable for /P engines. Inspection of the high pressure turbine (HPT) blades from the rear is limited to the areas that can be seen with a rigid borescope, at the 5:30 and 8:30 o'clock borescope ports (S16 and S17). The borescope ports at the
 5:30 and 8:30 o'clock positions are located immediately in front of the combustion case aft flange. Inspection of the HPT blades from the front can be accomplished, if required, with a flexible borescope through the spark igniter ports (S10 and S11) of the combustion case.
 NOTE : There are 80 HPT blades installed in the rotor.
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 2. Job Set-up Information
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 A. Fixtures, Tools, Test and Support Equipment
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No specific warning notice No specific 0.75 in. square drive socket No specific 2ft. long breaker bar No specific access platform 1 m (3 ft. 3 in.) No specific Torque Wrench : range 36.00 to 220.00 lbf.in
 (0.40 to 2.60 m.daN) 856A1320 1 BORESCOPE KIT 856A1322 1 BORESCOPE - LIGHT SOURCE SET 856A1323 1 MONITOR, RESOLUTION BORESCOPE 856A1488 1 MOTOR, DRIVE - CORE ENGINE ROTATION
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 B. Consumable Materials

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R  Material No.  CP1039 
R 
R  Material No.  CP1041 
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Material No.  CP2011 
Material No.  CP2101 
R  Material No.  CP2559 
R 
R  Material No.  CP2560 
R 
R  Material No.  CP2566 
R 
R  Material No.  CP2584 
R 
Material No.  CP2619 
R  Material No.  CP2656 
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Material No.  CP8001 

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acetone (Ref. 70-30-00)
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isopropyl alcohol (Ref. 70-30-00)
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 stoddard solvent (Ref. 70-30-00)
USA MIL-T-5544
 graphite grease (Ref. 70-30-00)
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ardrox 552 (Ref. 70-30-00)
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turco ind 79 (Ref. 70-30-00)
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mag-chem teksol (Ref. 70-30-00)
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degreasol 99 R (Ref. 70-30-00)
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 Never Seez-Pure Nickel, Special (Ref. 70-30-00)
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mag-chem skysol (Ref. 70-30-00)
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 lockwire 0.032in.(0.8mm) dia. (Ref. 70-30-00)

 C. Referenced Information
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71-13-00-010-040 71-13-00-410-040 72-00-00-200-025 72-42-00-290-007
72-42-00-290-041
72-52-00-290-004
72-63-00-000-002 72-63-00-400-002
F EEFF : ALL E E ECES Opening of the Fan Cowl DoorsClosing of the Fan Cowl DoorsOver-Serviceable-Limit ExtensionsBorescope Inspection of the Inner Cowl Bolts of the Combustion ChamberBorescope Inspection of the Combustion Chamber Liners and Dome AreaBorescope Inspection of the High Pressure Turbine Rotor Blade (from the front)Removal of the Handcranking Drive CoverInstallation of the Handcranking Drive Cover
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78-30-00-081-041 Make the Thrust Reverser Serviceable after Maintenance 78-30-00-481-041 Make the Thrust Reverser Unserviceable for
 Maintenance 78-36-00-010-040 Opening of the Thrust Reverser Doors 78-36-00-410-040 Closing of the Thrust Reverser Doors 80-11-10-000-002 Removal of the Pneumatic Starter 80-11-10-400-002 Installation of the Pneumatic Starter NTM 72-00-00 72-52-00-991-304 Fig. 601 72-52-00-991-300 Fig. 602 72-52-00-991-305 Fig. 605 72-52-00-991-306 Fig. 606 72-52-00-991-308 Fig. 607
 3. Job Set-up
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 Subtask 72-52-00-941-055
 A. Safety Precautions
 (1) On the center pedestal, on the ENG panel 115VU:
　
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