-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
20-26-00-910-002 Installation of Expansion Joints
20-28-00-912-004 Electrical Bonding of Components With Conductive Bolts and Screws and Bonding Straps in the Fuselage and in the Wings (this does not include the tanks)-
21-51-00-710-002 Operational Test of the Flow Control and Indicating System 21-51-11-000-001 Removal of the Differential Pressure Sensor 23HB2 (24HB2) 21-51-11-400-001 Installation of the Differential Pressure Sensor 23HB2 (24HB2) 21-51-13-000-001 Removal of the Pack-Inlet Pressure Sensor 23HB1 (24HB1) 21-51-13-400-001 Installation of the Pack-Inlet Pressure Sensor 23HB1 (24HB1) 21-51-51-000-002 Removal of the Air Duct upstream of the Flow Control Unit 21-51-51-400-002 Installation of the Air Duct upstream of the Flow Control Unit 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 53-35-13-000-002 Removal of the Quick-Release Access Panels from the Belly Fairing Structure 53-35-13-400-002 Installation of the Quick-Release Access Panels on the Belly Fairing Structure 21-51-51-991-003 Fig. 402
R **ON A/C 106-149, 303-399,
R 21-51-51-991-006 Fig. 403A
R **ON A/C 401-499,
21-51-51-991-006-A Fig. 403B
21-51-51-991-009 Fig. 404
R 1EFF : 106-149, 303-399, 401-499, 1 21-51-51Page 458 1 1 Aug 01/05 1 1 1CES 1R **ON A/C 106-149, 303-399, 401-499,
3. Job Set-up
__________
Subtask 21-51-51-560-051
A. Preparation for Installation
(1)
From the removed flow control unit:
-remove the sensors 23HB1(24HB1) and 23HB2(24HB2) (Ref. TASK 21-51-13-000-001) and (Ref. TASK 21-51-11-000-001).
(2)
On the new flow control unit:
-Install the sensors 23HB1(24HB1) and 23HB2(24HB2) (Ref. TASK 21-51-13-400-001) and (Ref. TASK 21-51-11-400-001).
Subtask 21-51-51-860-052
B. Aircraft Maintenance Configuration
(1) Make sure that:
(a)
The aircraft electrical circuits are energized (Ref. TASK 24-41-00-861-002).
(b)
On the panel 30VU: 1 The APU BLEED pushbutton switch is in the off position (the ON
_
legend is off).
2 The ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are in
_ the off position (the OFF legends are on).
3 The warning notice is in position to tell persons not to
_ operate these pushbutton switches.
(c)
On the HP ground connector the warning notice is in position to tell persons not to supply the ground air.
(d)
The access panels are removed (Ref. TASK 53-35-13-000-002):
R 1_FOR 23HB 191KB and 191BB,
R 2_FOR 24HB 192KB and 191BB.
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(e) The air duct is removed (Ref. TASK 21-51-51-000-002).
Subtask 21-51-51-865-064
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 23HB
R **ON A/C 401-499,
R 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 52HH 49HH 51HH 50HH D08 X22X21Y18
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