B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
21-26-56-000-001 Removal of the Air Inlet Check Valve (2150HM) 21-26-56-400-001 Installation of the Air Inlet Check Valve (2150HM) 24-42-00-861-001 Energize the Ground Service Network from the External
Power 24-42-00-862-001 De-energize the Ground Service Network Supplied from
the External Power 52-41-00-410-002 Close the Avionics Compartment Doors after Access 21-26-56-991-003 Fig. 501
3. Job Set-up
__________
CAUTION : USE ONLY THE GROUND SERVICE NETWORK TO SUPPLY ELECTRICITY BECAUSE
_______ THE AVIONICS VENTILATION SYSTEM IS NOT SERVICEABLE. IF YOU ENERGIZE THE AIRCRAFT ELECTRICAL CIRCUITS WITHOUT THE VENTILATION SYSTEM YOU WILL CAUSE DAMAGE TO ELECTRICAL EQUIPMENT.
Subtask 21-26-56-861-053
R A. Energize the ground service network (Ref. TASK 24-42-00-861-001).
Subtask 21-26-56-865-055
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU AIR COND/AVNCS VENT/CTL 6HQ D06 49VU AIR COND/AVNCS VENT/CTL 5HQ D05 122VU AIR COND/AVNCS/VENT/MONG 3HQ Y17
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
123VU AVNCS VENT/EXTC/FAN 2HQ AE02 **ON A/C ALL
123VU AVNCS VENT/BLOWER/FAN 1HQ AD10 **ON A/C 301-399,
123VU AVNCS VENT/EXTC/FAN 2HQ AC04 **ON A/C ALL
Subtask 21-26-56-010-053
C. Get Access
(1)
Put the access platform in position at the access door 824.
(2)
Open the access door 824.
4. Procedure
_________
(Ref. Fig. 501/TASK 21-26-56-991-003) Subtask 21-26-56-280-051
A. Manual Inspection of the Air Inlet Check Valve
(1) Do a manual inspection of the check valve (1) as follows:
(a)
Open the skin air inlet valve (15HQ) manually.
(b)
Through the inlet duct, make sure with your fingers that the check valve (1) operates correctly and specially that:
1_ The valve clappers touch their seats correctly,
2_ The clappers move freely on their hinge pin,
3_ The return springs operate correctly.
(2) If the check valve (1) does not operate correctly, replace it (Ref. TASK 21-26-56-000-001) and (Ref. TASK 21-26-56-400-001). ________
5. Close-up
Subtask 21-26-56-410-052
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Close the access door 824 (Ref. TASK 52-41-00-410-002).
(3) Remove the access platform(s). Subtask 21-26-56-865-056
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1HQ, 2HQ, 3HQ, 5HQ, 6HQ
Subtask 21-26-56-862-053
C. De-energize the ground service network (Ref. TASK 24-42-00-862-001).
1EFF : ALL 1 21-26-56Page 503 1 1 May 01/04R 1 1 1CES 1
Air Inlet Check Valve Figure 501/TASK 21-26-56-991-003
1EFF : 1 1R 1CES ALL 1 11 1 21-26-56 Page 504 May 01/04
CARGO COMPARTMENT VENTILATION - DESCRIPTION AND OPERATION
_________________________________________________________
1. General
_______
The AFT cargo-compartment ventilation-system, supplies air to the AFT cargo
compartment. The ventilation air comes from the cabin zones through openings
in the cabin floor behind the sidewall panels.
2. Component Location
__________________
(Ref. Fig. 001)
**ON A/C 001-049, 051-099, 101-149, 221-221, 224-224, 228-228,
(Ref. Fig. 002)
R **ON A/C 151-199, 401-499,
(Ref. Fig. 002A)
**ON A/C 201-220, 222-223, 225-227, 229-299,
(Ref. Fig. 002B)
**ON A/C 301-399,
(Ref. Fig. 002C)
**ON A/C ALL
-------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA
| | | | DOOR | REF. -------------------------------------------------------------------------------10HN CONT-CARGO VENTILATION 103VU 126 822 21-28-34 33HN VALVE-ISOLATION, AFT CARGO COMPT 162DW 172 826 21-28-52 34HN VALVE-ISOLATION, AFT CARGO COMPT 151EW 151 826 21-28-52 35HN FAN-EXTRACTION, AFT CARGO COMPT 162DW 172 826 21-28-54
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