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(2) Remove the warning notice(s).
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ECES E TASK 72-42-00-290-007
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Borescope Inspection of the Inner Cowl Bolts of the Combustion Chamber
1. Reason for the Job
__________________
Self Explanatory
2. Job Set-up Information
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A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific warning notice No specific access platform 1 m (3 ft. 3 in.) 856A1321 1 FIBERSCOPE SET 856A1322 1 BORESCOPE - LIGHT SOURCE SET 856A1323 1 MONITOR, RESOLUTION BORESCOPE
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
71-13-00-010-040 Opening of the Fan Cowl Doors 71-13-00-410-040 Closing of the Fan Cowl Doors 73-11-40-000-002 Removal of the Fuel Nozzle 73-11-40-400-002 Installation of the Fuel Nozzle 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 NTM 720000
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__________ Subtask 72-42-00-941-059
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 72-42-00-010-080
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 the access platform Subtask 72-42-00-040-059
C. Make the thrust reverser unserviceable for maintenance (Ref. TASK 78-30-00-481-041)
Subtask 72-42-00-010-081
D. Open the thrust reverser doors: (Ref. TASK 78-36-00-010-040)
FOR 1000EM1
451AL, 452AR
FOR 1000EM2
461AL, 462AR
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4. Procedure
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Subtask 72-42-00-010-082
A. Remove parts before borescope inspection.
(1) Select fuel nozzles to remove that will allow access to the outer liner area to be inspected.
(2) Remove the fuel nozzles (Ref. TASK 73-11-40-000-002)
Subtask 72-42-00-290-066
B. Do a borescope inspection.
R (1) Use the MONITOR, RESOLUTION BORESCOPE (856A1323G01) to make sure R borescope and the light source are serviceable. See the Non Destructive Test Manual for this procedure (Ref. NTM 720000).
R (2) Connect the fiber light cable to the FIBERSCOPE SET (856A1321) and to R the port on the BORESCOPE - LIGHT SOURCE SET (856A1322P03, P04, or P07).
(3) Put the fiberscope of the FIBERSCOPE SET (856A1321) into the fuel nozzle ports and turn on the light source of BORESCOPE - LIGHT SOURCE SET (856A1322P03, or P04).
(4) Adjust the borescope equipment to obtain maximum clarity of view.
(5) Inspect the following:
-------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
1. Inner side of inner cowl for:
A. Missing bolts Not serviceable See limit extensions
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