(2) Close the thrust reverser doors: (Ref. TASK 78-36-00-410-040). FOR 1000EM1 451AL, 452AR FOR 1000EM2 461AL, 462AR

 Subtask 72-23-00-440-062
 B. Make the thrust reverser serviceable (Ref. TASK 78-30-00-081-041).
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 Fan Frame Casing - Rust Removal
 Figure 801/TASK 72-23-00-991-313

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 C. Close Access
 (1) Close the fan cowl doors: (Ref. TASK 71-13-00-410-040) FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR

 (2) Remove the access platform(s).

 (3) Remove the warning notice(s).

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 TASK 72-23-00-300-042 Repair of Fan Duct Panel
 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
 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No.  CP5006 * austenite stainless steel wire - 321SS (Ref. 70-30-00)
 C. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
72-23-00-000-027 Removal of the Fan Duct Panels 72-23-00-400-027 Installation of the Fan Duct Panels SPM 70-32-11-23000500 SPM 70-41-11-35000900 SPM 70-45-11-31000200 72-23-00-991-314 Fig. 802
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 3. Job Set-up
__________ Subtask 72-23-00-941-082
 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 72-23-00-010-092
 B. Remove the fan duct panel (Ref. TASK 72-23-00-000-027).
 4. Procedure_________ (Ref. Fig. 802/TASK 72-23-00-991-314) NOTE : This repair procedure provides instruction for reconditioning cracked
____
 fan duct panels by weld buildup.

 Subtask 72-23-00-310-052
 A. Stop the crack by drilling a 0.079 in. (2 mm) dia. hole at both ends.
 (1) Weld up the crack under argon atmosphere, and using weld wire austenite stainless steel wire - 321SS (Material No. CP5006). (Ref. SPM 70-45-11-31000200).

 (2) Check the welded area (Ref. SPM 70-32-11-23000500).

 (3) Flush the weld bead (Ref. SPM 70-41-11-35000900).

 (4) Perform a fluorescent inspection of the weld bead (Ref. SPM 70-32-11-23000500).

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 Fan Duct Panels
 Figure 802/TASK 72-23-00-991-314

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________ Subtask 72-23-00-410-086
 A. Close Access
 (1) Install the fan duct panel (Ref. TASK 72-23-00-400-027).

 (2) Make sure that the work area is clean and clear of tool(s) and other items.

 (3) Remove the warning notice(s).

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