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 HEATER ELEMENT (4DW,9DW,16DW) - REMOVAL/INSTALLATION
____________________________________________________ TASK 30-73-53-000-002 Removal of the Potable-Water De-icing Heater Elements (4DW, 9DW, 16DW)
 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s) No specific access platform 2 m (6 ft. 7 in.)
 B. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-42-00-861-001  Energize the Ground Service Network from the External Power 52-30-00-860-001 Open the FWD or AFT Cargo-Compartment Door with the Yellow Electric Pump 30-73-53-991-002 Fig. 401
 3. Job Set-up
__________ Subtask 30-73-53-861-050
 A. Energize the ground service network (Ref. TASK 24-42-00-861-001).
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 B. Open, safety and tag this(these) circuit breaker(s):
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
124VU SVCE/601PP/602PP/SPLY 1PX BB01 R
 Subtask 30-73-53-010-051
 C. Get Access
 (1)
 Put the access platform in position at the FWD cargo-compartment door

 825.

 (2)
 Open the FWD cargo-compartment door 825 (Ref. TASK 52-30-00-860-001).

 (3)
 Set the CARGO COMPT LIGHT switch 6LU to ON.

 (4)
 Remove the access panel(s):
 FOR 4DW
 131GW, 131HW
 FOR 9DW
 131HW, 131MW
 FOR 16DW
 131HW

 4. Procedure
_________
 (Ref. Fig. 401/TASK 30-73-53-991-002)
 Subtask 30-73-53-020-051

 A. Removal of the Heater Elements
 (1)
 Open the protective cover (14).

 (2)
 FOR 4DW, 9DW Cut the ties that hold the label (1) and the CAUTION label (2). FOR 16DW Cut the ties that hold the label (1).

R (3) FOR 4DW, 9DW Remove the flow direction marker (3) and the DRINKING WATER marker (4). FOR 16DW Not applicable.
 (4)
 Remove the hook and loop tape (5).

 (5)
 Remove the adhesive tape (6).

 (6)
 Remove the insulation muffs (8).

 (7)
 Remove the adhesive tape (11) along the glass wool mat (7).

 (8)
 Remove the glass wool mat (7).

 (9)
 Disconnect the three wires of the heater elements (10) from the terminal block.

 (10)
 Remove the adhesive tape (9) from the pipe (12).

 (11)
 Remove the heater elements (10).

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 Heater Elements
 Figure 401/TASK 30-73-53-991-002- 12 (SHEET 1)

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 Heater Elements
 Figure 401/TASK 30-73-53-991-002- 22 (SHEET 2)

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 TASK 30-73-53-400-002

 Installation of the Potable-Water De-icing Heater Elements (4DW, 9DW, 16DW)
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------
REFERENCE  QTY DESIGNATION
 -------------------------------------------------------------------------------
No specific  access platform 2 m (6 ft. 7 in.)
 B. Expendable Parts
 -------------------------------------------------------------------------------
FIG.ITEM |DESIGNATION  |IPC-CSN
 -------------------------------------------------------------------------------
　
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