Subtask 21-61-51-865-067
B. Open, safety and tag this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------FOR 8HH
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
R 122VU AIR COND/PACK TEMP/CTL SYS1/1/115VAC 122VU AIR COND/PACK TEMP/CTL SYS1/1/28VDC 1HH 3HH X22X21
R **ON A/C 001-049, 051-099, 101-105, 151-199, 201-299, 301-302,
R R 122VU AIR COND/PACK TEMP CTL SYS2/1/28VDC **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399, 4HH Y19
R R 122VU AIR COND/PACK TEMP CTL SYS2/1/115VAC **ON A/C 106-149, 303-399, 2HH Y18
R 122VU 4HH Y19
**ON A/C ALL
FOR 28HH
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
122VU AIR COND/PACK TEMP/CTL SYS1/2/115VAC 122VU AIR COND/PACK TEMP/CTL SYS1/2/28VDC 122VU AIR COND/PACK TEMP CTL SYS2/2/28VDC 122VU AIR COND/PACK TEMP CTL SYS2/2/115VAC 21HH 23HH 24HH 22HH W22W21Y21Y20
**ON A/C ALL
Subtask 21-61-51-941-056
C. Safety Precautions
(1)
On the panel 30VU:
(a)
Make sure that the APU BLEED and the ENG BLEED/1(2) pushbutton switches are released.
(b)
Put a warning notice in position to tell persons not to operate these pushbutton switches.
(2)
On the HP ground connector put a warning notice in position to tell persons not to supply the ground air.
4. Procedure
_________
(Ref. Fig. 601/TASK 21-61-51-991-009) Subtask 21-61-51-220-051
A. Measurement of the Air Inlet Flap Backlash
(1) At the centre line of the air inlet flap (1) and the diffuser nose (2):
(a)
Measure and note the dimension "A".
(b)
Measure and note the dimension "B". NOTE : The measurement for the dimension "B" must be made with
____ the load applied (hand pressure). Do not apply excessive hand pressure as this could result in a false measurement.
(2)
Subtract dimension "A" from dimension "B". This will give you the backlash which exists in the air-inlet flap system.
(3)
If the backlash is more than 3mm (0.118 in) you must do a check of the in-service wear limits of the air-inlet flap mechanism (Ref. TASK 21-61-51-000-003) and (Ref. TASK 21-61-51-200-003).
(4)
If necessary replace the affected parts (Ref. TASK 21-61-51-400-003) and (Ref. TASK 21-61-00-300-001).
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(5) Make sure that the work area is clean and clear of tool(s) and other items. ________
5. Close-up
Subtask 21-61-51-865-068
A. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
(1)
FOR 8HH
-1HH, 2HH, 3HH, 4HH.
(2)
FOR 28HH
-
21HH, 22HH, 23HH, 24HH. Subtask 21-61-51-410-058
B.
Remove the warning notice(s). Subtask 21-61-51-862-056
C. De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
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