TASK 21-26-42-210-001
 Detailed Inspection of Demister Drain Hose Connection Area

 1.
 Reason for the Job

__________________
 Refer to the MPD TASK: 212600-06

 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 warning notice
 No specific access platform 1.60 m (5 ft. 3 in.)

 B. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
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
 **ON A/C 001-049, 051-099, 101-105,
 21-26-42-991-004 Fig. 603 R **ON A/C 301-399, 401-499,
 21-26-42-991-004-A Fig. 603A
R 1EFF : 001-049, 051-099, 101-105, 301-399, 1 21-26-42Page 618 1401-499, 1Aug 01/05 1 1 1CES 1R **ON A/C 001-049, 051-099, 101-105, 301-399, 401-499,

 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 21-26-42-861-054
 A. Energize the ground service network
 (Ref. TASK 24-42-00-861-001).

 Subtask 21-26-42-941-055
 B. Safety Precautions
 (1)
 On the AIR COND panel 30VU:

 (a)
 Make sure that the APU BLEED, all ENG BLEED and all PACK pushbutton switches are released (the OFF legends are on).

 (b)
 Put a warning notice in position to tell persons not to operate these pushbutton switches.

 (2)
 On the HP and LP ground connectors, put a warning notice in position to tell persons not to supply the ground air sources.

 Subtask 21-26-42-865-057
 C. 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 123VU AVNCS VENT/BLOWER/FAN 1HQ AD10

R **ON A/C 001-049, 051-099, 101-105, 401-499,
 123VU AVNCS VENT/EXTC/FAN 2HQ AE02
R 1EFF : 001-049, 051-099, 101-105, 301-399, 1 21-26-42Page 619 1401-499, 1Aug 01/05 1 1 1CES 1 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------**ON A/C 301-399,

 123VU AVNCS VENT/EXTC/FAN 2HQ AC04 R **ON A/C 001-049, 051-099, 101-105, 301-399, 401-499,
 Subtask 21-26-42-010-054
 D. Get Access
 (1)
 Put the access platform in position at the access door 824.

 (2)
 Open the access door 824.

 4. Procedure
_________
 **ON A/C 001-049, 051-099, 101-105,

 (Ref. Fig. 603/TASK 21-26-42-991-004) R **ON A/C 301-399, 401-499,
 (Ref. Fig. 603A/TASK 21-26-42-991-004-A)
 **ON A/C 001-049, 051-099, 101-105,

 Subtask 21-26-42-020-054
 A. Move the handle to the top to unlock the cover.
 (1) Pull the handle to remove the filter cover assembly.
R 1EFF : 001-049, 051-099, 101-105, 301-399, 1 21-26-42Page 620 1401-499, 1Aug 01/05 1 1 1CES 1

 Filter Assembly (Siphon and Drain Hose) and Ventilation Duct (Drain Hose)
 Figure 603/TASK 21-26-42-991-004

R 1EFF : 001-049, 051-099, 101-105, 1 21-26-42Page 621 1 1 May 01/05 1 1 1CES 1

 Filter Assembly (Siphon and Drain Hose) and Ventilation Duct (Drain Hose) Figure 603A/TASK 21-26-42-991-004-A
R 1EFF : 301-399, 401-499, 1 21-26-42Page 622 1 1 Aug 01/05 1 1 1CES 1 Subtask 21-26-42-210-056

 B. Do a visual inspection of the filter assembly for signs of impact, distortion and defective welding.
 (1)
 Make sure that the hose (1) does not show signs of breaking.

 (2)
 Make sure that the union (3) is in the correct condition. If not replace the packing (2).
　
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