B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
70-51-00-230-002 Fluorescent-Penetrant Inspection-Portable-Water
Washable 71-13-00-010-040 Opening of the Fan Cowl Doors 71-13-00-410-040 Closing of the Fan Cowl Doors 72-00-00-200-025 Over-Serviceable-Limit Extensions 72-41-00-300-002 Repairs of the Combustion Case Assembly 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 72-41-00-991-300 Fig. 601
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3. Job Set-up
__________
Subtask 72-41-00-941-052
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.
(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).
Subtask 72-41-00-010-054
B. Get Access
(1) Open the fan cowl doors: (Ref. TASK 71-13-00-010-040)
FOR 1000EM1
437AL, 438AR
FOR 1000EM2
447AL, 448AR
(2) Put an access platform in position.
Subtask 72-41-00-040-052
C. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041).
Subtask 72-41-00-010-056
D. Open the thrust reverser cowl doors: (Ref. TASK 78-36-00-010-040)
FOR 1000EM1
451AL, 452AR
FOR 1000EM2
461AL, 462AR
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4. Procedure
_________
(Ref. Fig. 601/TASK 72-41-00-991-300)
Subtask 72-41-00-230-052
A. Do a fluorecent penetrant inspection.
(1) Do a fluorescent penetrant inspection of actual or suspected cracks in the combustion case assembly (Ref. TASK 70-51-00-230-002).
Subtask 72-41-00-210-051
B. Do a visual inspection.
(1) Do the visual inspection that follows:
-------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
1. Combustion casing body for :
- Cracks Not serviceable
- Nicks, scores and Any number 0.03 in.
scratches (0.76 mm) deep after
removal of high metal
- Dents Any number 0.10 in.
(2.54 mm) deep after removal of high metal
- Buckling or distortion Not serviceable
because of
overtemperature
- Hot spots Any number, if metal not
(discoloration) crazed. No cracks are
permitted.
2. Combustion casing forward flanges for :
- Bolt hole cracks that One crack per hole, 2
extend radially cracks per frame
outward
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Combustion Case Assembly
Figure 601/TASK 72-41-00-991-300
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-------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
- Bolt hole cracks that Not serviceable extend radially inward
3. Combustion case midflange for :
- Broken bolts One broken bolt with a minimum of 5 bolts that are not broken on both sides of the broken bolt. No more than 2 broken bolts in any group of 20.
4. Combustion casing aft flange for :
- Bolt hole cracks that extend radially outward
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