R 1EFF : 106-149, 303-399, 401-499, 1 21-51-51Page 487 1 1 Aug 01/05 1 1 1CES 1

R R  -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------122VU AIR COND/TEMP CTL SYS 2/CHAN A/28VDC 55HH W21 122VU AIR COND/TEMP CTL SYS 2/CHAN B/28VDC 56HH Y21 122VU AIR COND/TEMP CTL SYS 2/CHAN B/115VAC 54HH Y20 
R  **ON A/C 106-149, 303-399, 401-499,
 Subtask 21-51-51-710-054
 E. Test
 (1) Do the pre-conditioning through the HP ground connector (Ref. TASK 12-33-21-618-001) or with the APU (Ref. TASK 12-33-21-618-001).
 (2) Do a leak check of the air duct connections.
 NOTE : Minimum leakage is permitted. After the pack operates some____ minutes, the leakage of air will reduce because the seals have their correct operating temperature.
 (3) After approx. 15 minutes stop the pre-conditioning (Ref. TASK 12-33-21-618-001) or (Ref. TASK 12-33-21-618-001).
 (4) Do the operational test of the pack temperature control system (Ref. TASK 21-61-00-710-001).
 5. Close-up________
 Subtask 21-51-51-410-061
 A. Close Access
 (1) Make sure that the work area is clean and clear of tool(s) and other items.
 (2) Close the access panels (Ref. TASK 53-35-13-400-002): 
R  (a) FOR 23HB 191KB and 191BB. 
R  (b) FOR 24HB 192KB and 192FB. 

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 B. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).

R VALVE - PACK FLOW CONTROL (8HB,11HB,23HB,24HB) - INSPECTION/CHECK
_________________________________________________________________ TASK 21-51-51-200-001 Attachment Components (In-Service Wear Limits) - Flow Control Valve (Unit)
 1.
 Reason for the Job

__________________
 Self Explanatory

 2.
 Job Set-up Information

______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
21-51-00-300-001 Attachment Components - Repair/Replacement
 21-51-51-991-004 Fig. 601

 3. Job Set-up
__________
 Subtask 21-51-51-010-054

 A. Get Access
 (1) Make sure that the applicable components are disassembled to do the inspection procedure.
 4. Procedure
_________
 (Ref. Fig. 601/TASK 21-51-51-991-004)
 Subtask 21-51-51-210-052

 A. Visual Inspection of the Spherical Bearings in the Bracket Assembly
 (1) Use an applicable measurement method and do a check for radial and axial play at the spherical bearings (2) in the bracket assembly (21).
 (a) If you find more than 0.05 mm (0.0019 in.) radial play or more than 0.2 mm (0.0078 in.) axial play in a spherical bearing (2) then you must replace the bracket assembly (21).

R  Attachment Components Figure 601/TASK 21-51-51-991-004
 1EFF : 1 1 1CES  ALL  1 111 21-51-51 Page 602 May 01/00

 Subtask 21-51-51-220-051
 B. In-Service Wear Limits
 (1) Use applicable measurement equipment and measure the outside diameter (OD) of the bushings (6) and the inside diameter (ID) of the shouldered bushings (4).
 NOTE : If any of the components are 'out of limits' then you must____ replace them. - for item (4) (Ref. TASK 21-51-00-300-001).
 -------------------------------------------------------------------------------
R R R R R R R  | FIG. | ORIGINAL MANUFACTURING LIMITS | IN-SERVICE WEAR LIMITS | | DETAIL |---------------------------------------|----------------------------| | AND | DIMENSION | ASSEMBLY CLEARANCE| DIMENSION LIMITS | MAX. | | ITEM | MM (IN.) | MM (IN.) | MM (IN.) | ALLOW. | | NO. |-------------------|-------------------|---------|---------| CLEAR. | | | MIN. | MAX. | MIN. | MAX. | MIN. | MAX. |MM (IN.)| |--------|---------|---------|---------|---------|---------|---------|--------| | BB | 8.986 | 8.995 | | | 8.979 | | | | OD 6 |(0.3537) |(0.3541) | | |(0.3535) | | | | | | | 0.005 | 0.029 | | | 0.043 | | | | | (0.0001)| (0.0011)| | |(0.0016)| | BB | 9.000 | 9.015 | | | | 9.022 | | | ID 4 |(0.3543) |(0.3549) | | | |(0.3551) | | -------------------------------------------------------------------------------
Subtask 21-51-51-220-052
　
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