4. Procedure
_________
 (Ref. Fig. 401/TASK 21-51-13-991-001)
 Subtask 21-51-13-020-050
 A. Removal of the Pressure Sensor
 (1)
 Remove the screws (6), the washers (5) and the clamp (4).

 (2)
 Discard the washers (5).

 (3)
 Loosen and partially remove the screws (1).

 (4)
 Push the screws (1) to disconnect the sensor (8) from the sensor mount (11).

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 Pack-Inlet Pressure Sensor
 Figure 401/TASK 21-51-13-991-001 
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1  1  Aug 01/05
 1  1
 1CES  1

 (5)
 Remove the screws (1) and the washers (2). NOTE : Make sure that the inserts (3) stay in the sensor mount (11).

____

 (6)
 Disconnect the electrical connector (7) and remove the sensor (8).

 (7)
 Remove and discard the O-ring (10).

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 Installation of the Pack-Inlet Pressure Sensor 23HB1 (24HB1)
 1. Reason for the Job
__________________
 Self Explanatory
 2. Job Set-up Information
______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific tab-washers (5) 23350CA040 No specific O-ring (10) AS3582-015 No specific Torque Wrench : range 0.00 to 1.20 m.daN
 (0.00 to 9.00 lbf.ft)
 B. Consumable Materials
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
Material No. 04-012 USA VV-P-236 PURE MINERALVASELINE OR PETRO- LATUM (Ref. 20-31-00) Material No. 04-014A USA MIL-PRF-907 HIGH TEMPERATURECOMPOUND (Ref. 20-31-00)
 C. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-33-21-618-001 Pre-conditioning through the HP Ground Connection 12-33-21-618-001 Pre-conditioning with the APU 21-51-00-710-002 Operational Test of the Flow Control and Indicating
 System 24-41-00-861-002 Energize the Aircraft Electrical Circuits from the External Power 24-41-00-862-002 De-energize the Aircraft Electrical Circuits Supplied from the External Power
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 -------------------------------------------------------------------------------
REFERENCE DESIGNATION -------------------------------------------------------------------------------
53-35-13-000-002 53-35-13-400-002  Removal of the Quick-Release Access Panels from the Belly Fairing StructureInstallation of the Quick-Release Access Panels on the Belly Fairing Structure
 3. Job Set-up__________
 Subtask 21-51-13-860-050
 A. Aircraft Maintenance Configuration
 (1) Make sure that:
 (a) The aircraft electrical circuits are energized (Ref. TASK 24-41-00-861-002).
 (b) The access panel is removed (Ref. TASK 53-35-13-000-002), FOR 23HB1 191BB, FOR 24HB1 192FB.
 Subtask 21-51-13-865-051
 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------
PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
RRR R  FOR 23HB1 49VU AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC 122VU AIR COND/TEMP CTL SYS 1/CHAN A/115VAC 122VU AIR COND/TEMP CTL SYS 1/CHAN A/28VDC 122VU AIR COND/TEMP CTL SYS 1/CHAN B/115VAC FOR 24HB1 122VU AIR COND/TEMP CTL SYS 2/CHAN A/115VAC 122VU AIR COND/TEMP CTL SYS 2/CHAN A/28VDC 122VU AIR COND/TEMP CTL SYS 2/CHAN B/28VDC 122VU AIR COND/TEMP CTL SYS 2/CHAN B/115VAC  52HH 49HH 51HH 50HH 53HH 55HH 56HH 54HH  D08 X22X21Y18W22W21 Y21Y20 

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 4. Procedure
_________ Subtask 21-51-13-420-050
 A. Installation of the Pressure Sensor
 (1) Lubrication of the O-ring WARNING : OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE
_______ THIS/THESE MATERIAL/S. USE PROTECTIVE CLOTHING AND RUBBER GLOVES.
 (a) Apply a small amount of COMMON GREASE (Material No. 04-012) to the new O-ring (10) AS3582-015.
　
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