(5) Remove the access platform(s).

 (6) Remove the warning notice(s).

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 TASK 72-23-00-280-007
 Inspection of Aft Acoustical Panels
 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
 No specific access platform 1 m (3 ft. 3 in.)

 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 72-23-00-000-026 Removal of the Aft Acoustical Panels 72-23-00-300-044 Repair of Forward, Mid and Aft Acoustical Panels when
 Missing Cup 72-23-00-400-026 Installation of the Aft Acoustical Panels 72-23-00-400-044 Installation of Acoustical Panels Attachment Screw
 Locking
 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

R 72-23-00-991-311 Fig. 609
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__________ Subtask 72-23-00-941-095
 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 72-23-00-010-120
 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 72-23-00-040-073

 C. Make the thrust reverser unserviceable (Ref. TASK 78-30-00-481-041). Subtask 72-23-00-010-121

 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
_________
R (Ref. Fig. 609/TASK 72-23-00-991-311)
 Subtask 72-23-00-350-060
 A. Inspection of Aft Acoustical Panels
 -------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------
1. Aft acoustical panel
 cups
 A. Dents, marks,  No limits  (Ref. TASK 72-23-00-400-
indentations  026) for re-installation.
 caused by screw
 head.
 B. Pierced cups  Not serviceable  (Ref. TASK 72-23-00-400-
caused by screw  044)
 head.
 C. Unbonded cups.  Not serviceable  (Ref. TASK 72-23-00-300-
044)
 D. Missing cups.  Not serviceable  (Ref. TASK 72-23-00-300-
044)
 PRE SB 72-071
 E. Damaged or missing  No limits unless the  Replace seal if missing
 bonded seal(s)  whole seal is missing
 END OF PRE SB
 72-071
 POST SB 72-071
 F. Mis-installed,  Not serviceable  Install the seal
 badly damaged or  correctly, or install a

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