Installation of the Air Inlet

TASK 21-61-51-400-002-A
Installation of the Air Inlet

WARNING: MAKE SURE THAT AIR IS NOT SUPPLIED TO THE AIR CONDITIONING SYSTEM FROM THE MAIN ENGINE, THE APU OR A GROUND SOURCE. HOT COMPRESSED AIR CAN CAUSE INJURY TO PERSONNEL.

FIN: 20HM
FIN: 21HM
FIN: 28HH
FIN: 8HH

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	Torque wrench: range to between 0.26 and 0.22 m.daN (23.01 and 19.47 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06AEA1)	Polysulfide Sealant-Low Adhesion Brushable -
(Material No.06LCG9)	Non Hardening Jointing Putty-Medium Temp. Area - -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
191BB, 191KB, 192FB, 192KB

D. Referenced Information

REFERENCE	DESIGNATION
TASK 21-52-42-000-001-A	Removal of the Water Injector
TASK 21-52-42-400-001-A	Installation of the Water Injector
TASK 21-61-00-710-001-A	Operational Test of the Pack Temperature-Control System
TASK 21-61-51-000-001-A	Removal of the Air-Inlet Flap Actuator
TASK 21-61-51-400-001-A	Installation of the Air-Inlet Flap Actuator
TASK 21-61-51-820-001-A	Adjustment of the Air Inlet Flap
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 53-35-13-000-002-A	Removal of the Quick-Release Access Panels from the Belly Fairing Structure
TASK 53-35-13-400-002-A	Installation of the Quick-Release Access Panels on the Belly Fairing Structure
Air Inlet - Component Location ** ON A/C NOT FOR ALL
Air Inlet - Component Location ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 21-61-51-860-054-A

A. Aircraft Maintenance Configuration
(1) Make sure that:
(a) The aircraft electrical circuits are energized (Ref. AMM TASK 24-41-00-861-002).
(b) On the panel 30VU:

the APU BLEED and the ENG BLEED/1(2) pushbutton switches are released and,
the warning notice to tell persons not to operate these pushbutton switches is in position.

(c) On the HP ground connector the warning notice to tell persons not to supply the ground air is in position.
(d) The access panels are removed (Ref. AMM TASK 53-35-13-000-002).
1 For the Left air inlet,

191BB and 191KB.

2 For the Right air inlet,

192FB and 192KB.

Subtask 21-61-51-865-054-A

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC	52HH	D08
** ON A/C NOT FOR ALL
122VU	AIR COND/PACK TEMP/CTL SYS1/2/115VAC	21HH	W22
122VU	AIR COND/PACK TEMP/CTL SYS1/2/28VDC	23HH	W21
122VU	AIR COND/PACK TEMP/CTL SYS1/1/115VAC	1HH	X22
122VU	AIR COND/PACK TEMP/CTL SYS1/1/28VDC	3HH	X21
122VU	AIR COND/PACK TEMP CTL SYS2/2/28VDC	24HH	Y21
122VU	AIR COND/PACK TEMP CTL SYS2/2/115VAC	22HH	Y20
122VU	AIR COND/PACK TEMP CTL SYS2/1/28VDC	4HH	Y19
122VU	AIR COND/PACK TEMP CTL SYS2/1/115VAC	2HH	Y18
** ON A/C NOT FOR ALL
122VU	AIR COND/TEMP CTL SYS 2/CHAN A/115VAC	53HH	W22
122VU	AIR COND/TEMP CTL SYS 2/CHAN A/28VDC	55HH	W21
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/115VAC	49HH	X22
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/28VDC	51HH	X21
122VU	AIR COND/TEMP CTL SYS 2/CHAN B/28VDC	56HH	Y21
122VU	AIR COND/TEMP CTL SYS 2/CHAN B/115VAC	54HH	Y20
122VU	AIR COND/TEMP CTL SYS 1/CHAN B/115VAC	50HH	Y18

4. Procedure
Subtask 21-61-51-560-050-A

A. Preparation of the Replacement Component
(1) From the removed air inlet:
(a) Remove the water injector (Ref. AMM TASK 21-52-42-000-001).
(b) Remove the air-inlet flap actuator (Ref. AMM TASK 21-61-51-000-001).
(2) On the replacement air inlet:
(a) Install the water injector (Ref. AMM TASK 21-52-42-400-001).
(b) Install the air-inlet flap actuator (Ref. AMM TASK 21-61-51-400-001).

Subtask 21-61-51-420-051-B ** ON A/C NOT FOR ALL

NOTE: If it is necessary to replace any, or all of the support rods then you must adjust the support rod/s to make sure that you can install the access panels which are adjacent to the air inlet.

6 Remove the temporary attachment from the electrical cable (39).
7 Put the clamps (15) in position on the electrical cable (39) and install the screws (17), the spacers (16), the washers (14) and the nuts (13).
8 Put the clamps (32) in position on the electrical cable (39) and the clamps (35) in position on the bonding strap (56).
9 Put the spacers (36) in position and install the bolts (34), the washers (31) and the clamps (32) and (35).
10 Put the spacers (33) in position and install the bolts (30) and the washers (31) and the clamps (32).
11 Put the cross beam (7) in position in the brackets (23) and (11) and install the quick-release pins (22) and (9).
12 Put the clamp (4) and the bellows (5) in position on the air inlet (3).
13 Make sure that the bellows (5) is in the correct position.
14 TORQUE the clamp (4) to between 0.26 and 0.22 m.daN (23.01 and 19.47 lbf.in )

.
15 Remove the blanking caps from the disconnected electrical connectors.
16 Make sure that all the electrical connections are clean and in the correct condition.
17 Connect the electrical connector (58).
18 Remove the blanking plugs and connect the water injector connector (57).
19 Make sure that the work area is clean and clear of tools and other items.
(b) For the Right air inlet,
1 Remove the protective covers from the air inlet (6) and the bellows (5).
2 Put the air inlet (6) in position and install the washers (1) and the screws (2).
3 Put the support rod (47) in position in the bracket (45) and install the bolt (46), the washer (48) and the nut (49).
4 Put the support rods (54) and (51) in position on the bracket (45) and install the bolt (50), the washer (52) and the nut (53).
5 Put the support rods (41) and (42) in position in the bracket (43) and install the bolts (24), the washers (26) and the nuts (27).
6 Put the support rod (40) in position in the bracket (41) and install the bolt (24), the washer (26) and the nut (27).

NOTE: If it is necessary to replace any, or all of the support rods then you must adjust the support rod/s to make sure that you can install the access panels which are adjacent to the air inlet.

7 Remove the temporary attachment from the electrical cable (55).
8 Put the clamp (15) in position on the electrical cable (55) and install the screw (17), the spacers (16), the washer (14) and the nut (13).
9 Put the clamps (32) in position on the electrical cable (55) and the clamps (35) in position on the bonding strap (56).
10 Put the spacers (36) in position and install the bolts (34), the washers (31) and the clamps (32) and (35).
11 Put the spacers (33) in position and install the bolts (30) and the washers (31) and the clamps (32).
12 Put the cross beam (8) in position in the brackets (45) and (12) and install the quick-release pins (44) and (10).
13 Put the clamp (4) and the bellows (5) in position on the air inlet (6).
14 Make sure that the bellows (5) is in the correct position.
15 TORQUE the clamp (4) to between 0.26 and 0.22 m.daN (23.01 and 19.47 lbf.in )

.
16 Remove the blanking caps from the disconnected electrical connectors.
17 Make sure that all the electrical connections are clean and in the correct condition.
18 Connect the electrical connector (58).
19 Remove the blanking plugs and connect the water injector connector (57).
20 Make sure that the work area is clean and clear of tools and other items.
(4) Do the adjustment of the ram air-inlet flap (Ref. AMM TASK 21-61-51-820-001).

Subtask 21-61-51-420-051-C ** ON A/C NOT FOR ALL

B. Installation of the Air Inlet
(1) Clean the component interfaces and the adjacent area.
(2) Make sure that the parts retained from the removed component are clean and in the correct condition.
(3) Install the air inlet:
(a) For the Left air inlet,
1 Remove the protective covers from the air inlet (3) and the bellows (5).
2 Put the air inlet (3) in position and install the washers (1) and the screws (2).
3 Put the support rod (19) in position in the bracket (23) and install the bolt (18), the washer (20) and the nut (21).
4 Apply Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) between the contact surfaces of the bracket (60) and the brackets (28) and (37).
5 Apply a small quantity of Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) to the bolts (27).
6 Put the support rods (25) and (29) in position in the bracket (28) and install the bolts (24), the washers (26), the bushing (59), the bracket (60) and the nuts (27).
7 Put the support rod (38) in position in the bracket (37) and install the bolt (24), the washers (26), the bushing (59), the bracket (60) and the nut (27).

NOTE: If it is necessary to replace any, or all of the support rods then you must adjust the support rod/s to make sure that you can install the access panels which are adjacent to the air inlet.

8 Remove the temporary attachment from the electrical cable (39).
9 Put the clamps (15) in position on the electrical cable (39) and install the screws (17), the spacers (16), the washers (14) and the nuts (13).
10 Put the clamps (32) in position on the electrical cable (39) and the clamps (35) in position on the bonding strap (56).
11 Put the spacers (36) in position and install the bolts (34), the washers (31) and the clamps (32) and (35).
12 Put the spacers (33) in position and install the bolts (30) and the washers (31) and the clamps (32).
13 Put the cross beam (7) in position in the brackets (23) and (11) and install the quick-release pins (22) and (9).
14 Put the clamp (4) and the bellows (5) in position on the air inlet (3).
15 Make sure that the bellows (5) is in the correct position.
16 TORQUE the clamp (4) to between 0.26 and 0.22 m.daN (23.01 and 19.47 lbf.in )

.
17 Remove the blanking caps from the disconnected electrical connectors.
18 Make sure that all the electrical connections are clean and in the correct condition.
19 Connect the electrical connector (58).
20 Remove the blanking plugs and connect the water injector connector (57).
21 Remove the support tool between IGGS pallet (8YA) and frame C34/C35.7.
22 Make sure that the work area is clean and clear of tools and other items.
(b) For the Right air inlet,
1 Remove the protective covers from the air inlet (6) and the bellows (5).
2 Put the air inlet (6) in position and install the washers (1) and the screws (2).
3 Put the support rod (47) in position in the bracket (45) and install the bolt (46), the washer (48) and the nut (49).
4 Put the support rods (54) and (51) in position on the bracket (45) and install the bolt (50), the washer (52) and the nut (53).
5 Put the support rods (41) and (42) in position in the bracket (43) and install the bolts (24), the washers (26) and the nuts (27).
6 Put the support rod (40) in position in the bracket (41) and install the bolt (24), the washer (26) and the nut (27).

NOTE: If it is necessary to replace any, or all of the support rods then you must adjust the support rod/s to make sure that you can install the access panels which are adjacent to the air inlet.

Subtask 21-61-51-865-074-A

C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
FOR FIN: 8HH (P1 RAM AIR IN ACTUATOR)
49VU	AIR COND/TEMP CTL/SYS 1 CHAN B/28VDC	52HH	D08
** ON A/C NOT FOR ALL
122VU	AIR COND/PACK TEMP/CTL SYS1/1/115VAC	1HH	X22
122VU	AIR COND/PACK TEMP/CTL SYS1/1/28VDC	3HH	X21
122VU	AIR COND/PACK TEMP CTL SYS2/1/28VDC	4HH	Y19
122VU	AIR COND/PACK TEMP CTL SYS2/1/115VAC	2HH	Y18
** ON A/C NOT FOR ALL
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/115VAC	49HH	X22
122VU	AIR COND/TEMP CTL SYS 1/CHAN A/28VDC	51HH	X21
122VU	AIR COND/TEMP CTL SYS 1/CHAN B/115VAC	50HH	Y18
** ON A/C NOT FOR ALL
FOR FIN: 28HH (P2 RAM AIR IN ACTUATOR)
122VU	AIR COND/PACK TEMP/CTL SYS1/2/115VAC	21HH	W22
122VU	AIR COND/PACK TEMP/CTL SYS1/2/28VDC	23HH	W21
122VU	AIR COND/PACK TEMP CTL SYS2/2/28VDC	24HH	Y21
122VU	AIR COND/PACK TEMP CTL SYS2/2/115VAC	22HH	Y20
** ON A/C NOT FOR ALL
122VU	AIR COND/TEMP CTL SYS 2/CHAN A/115VAC	53HH	W22
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

Subtask 21-61-51-710-051-A

D. Do the operational test of the pack temperature control system (Ref. AMM TASK 21-61-00-710-001).

5. Close-up
Subtask 21-61-51-410-051-A

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the access panels (Ref. AMM TASK 53-35-13-400-002).
(a) For the Left air inlet,

191BB and 191KB.

(b) For the Right air inlet,

192FB and 192KB.

Subtask 21-61-51-862-052-A

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

[Rev.10 from 2021] 2026.04.02 06:11:39 UTC