General Visual Inspection of the Riser Ducts in the Passenger Compartment

TASK 21-20-00-210-001-A
General Visual Inspection of the Riser Ducts in the Passenger Compartment

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.

ZONE: 230
ZONE: 240
ZONE: 250

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

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.05RAJ9)	Adhesive Film Tape-- Film PTFE -
(Material No.05TGA1)	Adhesive Tape-Insulation Blanket - -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
230	FWD PASSENGER COMPARTMENT
240	MID PASSENGER COMPARTMENT
250	AFT PASSENGER COMPARTMENT

D. Referenced Information

REFERENCE	DESIGNATION
TASK 21-20-00-010-001-A	Removal of the Air-Conditioning Distribution Ducts
TASK 21-20-00-410-001-A	Installation of the Air-Conditioning Distribution Ducts
TASK 25-23-41-000-001-A	Removal of the Ceiling Panels
TASK 25-23-41-400-001-A	Installation of the Ceiling Panels
TASK 25-23-43-000-001-A	Removal of the Upper Sidewall Panel
TASK 25-23-43-400-001-A	Installation of the Upper Sidewall Panel
TASK 25-23-44-000-001-A	Removal of the Lower Sidewall Panels (Dado Panels)
TASK 25-23-44-400-001-A	Installation of the Lower Sidewall Panels (Dado Panels)
TASK 25-23-48-000-001-A	Removal of the Cove Light Panel
TASK 25-23-48-400-001-A	Installation of the Cove Light Panel
Riser Ducts - General Component Location
Riser Duct/Dado Panel - Critical Distance ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 21-20-00-010-055-A

A. Get Access
(1) Remove, when installed, the passenger compartment seats (refer to AMM chapter 25-21).
(2) Remove the ceiling panels (Ref. AMM TASK 25-23-41-000-001).

Subtask 21-20-00-010-056-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Remove, when installed,
(a) the forward lavatory/ies (refer to AMM chapter 25-41),
(b) the middle lavatory (refer to AMM chapter 25-42) and,
(c) the aft lavatory/ies (refer to AMM chapter 25-43).

Subtask 21-20-00-010-057-B ** ON A/C NOT FOR ALL

C. Get Access
(1) Remove, when installed,
(a) the forward galley units (refer to AMM chapter 25-31),
(b) the middle galley units (refer to AMM chapter 25-32) and,
(c) the aft galley units (refer to AMM chapter 25-33).

Subtask 21-20-00-010-056-B ** ON A/C NOT FOR ALL

D. Get Access
(1) Remove, when installed,
(a) the forward lavatory/ies (refer to AMM chapter 25-41) and,
(b) the aft lavatory/ies (refer to AMM chapter 25-43).

Subtask 21-20-00-010-057-A ** ON A/C NOT FOR ALL

E. Get Access
(1) Remove, when installed,
(a) the forward galley units (refer to AMM chapter 25-31),
(b) the aft galley units (refer to AMM chapter 25-33).

Subtask 21-20-00-010-051-A ** ON A/C NOT FOR ALL

F. Get Access
(1) Remove,
(a) the lower sidewall panels between frames C21 to C37, C39 to C40 and C41 to C66 (Ref. AMM TASK 25-23-44-000-001),
(b) the upper sidewall panels between frames C21 to C37, C39 to C40 and C41 to C66 (Ref. AMM TASK 25-23-43-000-001) and,
(c) the cove light panels between frames C21 to C65 (Ref. AMM TASK 25-23-48-000-001).

Subtask 21-20-00-010-051-B ** ON A/C NOT FOR ALL

F. Get Access
(1) Remove,
(a) the lower sidewall panels between frames C21 to C35, C35.3 to C47.2 and C48 to C66 (Ref. AMM TASK 25-23-44-000-001),
(b) the upper sidewall panels between frames C21 to C35, C35.3 to C38, C40 to C47.2 and C48 to C66 (Ref. AMM TASK 25-23-43-000-001) and,
(c) the cove light panels between frames C21 to C35, C35.3 to C38, C40 to C47.2 and C48 to C66 (Ref. AMM TASK 25-23-48-000-001).

Subtask 21-20-00-010-051-C ** ON A/C NOT FOR ALL

F. Get Access
(1) Remove,
(a) the lower sidewall panels between frames C21 to C40 and C42 to C66 (Ref. AMM TASK 25-23-44-000-001),
(b) the upper sidewall panels between frames C21 to C40 and C42 to C66 (Ref. AMM TASK 25-23-43-000-001) and,
(c) the cove light panels between frames C21 to C65 (Ref. AMM TASK 25-23-48-000-001).

Subtask 21-20-00-865-053-A

G. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
122VU	AIR COND/RECIRC FAN/R/SPLY	3HG	W18
122VU	AIR COND/RECIRC FAN/L/SPLY	1HG	X18

Subtask 21-20-00-860-053-A

H. Safety Precautions
(1) On the panel 30VU:
(a) Make sure that:

the APU BLEED pushbutton switch is in the off position (the ON legend is off) and,
the ENG 1 BLEED and the ENG 2 BLEED pushbutton switches are in the off position (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 the LP ground connector put a warning notice in position to tell persons not to supply the ground air.

4. Procedure
Subtask 21-20-00-210-050-A ** ON A/C NOT FOR ALL

A. Inspection

Riser Ducts - General Component Location ** ON A/C NOT FOR ALL

Riser Duct/Dado Panel - Critical Distance ** ON A/C NOT FOR ALL

(1) Do a general visual inspection of the riser ducts for:

breakages, cracks and delamination of the composite material,
security of installation of the duct system and,
correct installation and general condition of the duct connections.

(a) Replace any worn, delaminated or damaged components and safety any loose installation (refer to examples in)
(Ref. AMM TASK 21-20-00-010-001) and,
(Ref. AMM TASK 21-20-00-410-001)
(2) Do a visual inspection of the insulation of the riser ducts for:

damages.

(a) Repair small damages of the insulation:

Apply wear protection to the insulation (Ref. Duct Fuel Pipe Repair Manual - DFPRM 51-12-00),

(b) If necessary, replace any damaged components.
(3) Do a check of the critical distance of 25 mm (0.9843 in.) between the riser duct (1) and the dado panel holder (2).
(a) If the distance is less than 25 mm (0.9843 in.) continue as follows:

wind 2 layers of tape (3) Adhesive Tape-Insulation Blanket - - (Material No.05TGA1) around the riser duct (1),
cut a piece of the tape (4) Adhesive Film Tape-- Film PTFE - (Material No.05RAJ9) of 25 mm (0.9843 in.) x 40 mm (1.5748 in.) and put it in position in the area of the dado panel fastener,
wind 2 layers of tape (3) Adhesive Tape-Insulation Blanket - - (Material No.05TGA1) around the riser duct (1).

Subtask 21-20-00-210-050-B ** ON A/C NOT FOR ALL

A. Inspection

Riser Ducts - General Component Location ** ON A/C NOT FOR ALL

(1) Do a general visual inspection of the riser ducts for:

breakages, cracks and delamination of the composite material,
security of installation of the duct system and,
correct installation and general condition of the duct connections.

damages.

(a) Repair small damages of the insulation:

Apply wear protection to the insulation (Ref. Duct Fuel Pipe Repair Manual - DFPRM 51-12-00),

(b) If necessary, replace any damaged components.

Subtask 21-20-00-865-055-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
122VU	AIR COND/RECIRC FAN/R/SPLY	3HG	W18
122VU	AIR COND/RECIRC FAN/L/SPLY	1HG	X18

5. Close-up
Subtask 21-20-00-410-051-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install,
(a) the cove light panels between frames C21 to C65 (Ref. AMM TASK 25-23-48-400-001),
(b) the upper sidewall panels between frames C21 to C37, C39 to C40 and C41 to C66 (Ref. AMM TASK 25-23-43-400-001) and,
(c) the lower sidewall panels between frames C21 to C37, C39 to C40 and C41 to C66 (Ref. AMM TASK 25-23-44-400-001).

Subtask 21-20-00-410-051-B ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install,
(a) the cove light panels between frames C21 to C35, C35.3 to C47.2 and C47.5 to C66 (Ref. AMM TASK 25-23-48-400-001),
(b) the upper sidewall panels between frames C21 to C35, C35.3 to C38, C40 to C47.2 and C48 to C66 (Ref. AMM TASK 25-23-43-400-001) and,
(c) the lower sidewall panels between frames C21 to C35, C35.3 to C47.2 and C48 to C66 (Ref. AMM TASK 25-23-44-400-001).

Subtask 21-20-00-410-051-C ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install,
(a) the cove light panels between frames C21 to C65 (Ref. AMM TASK 25-23-48-400-001),
(b) the upper sidewall panels between frames C21 to C40 and C42 to C65 (Ref. AMM TASK 25-23-43-400-001) and,
(c) the lower sidewall panels between frames C21 to C40 and C42 to C64 (Ref. AMM TASK 25-23-44-400-001).

Subtask 21-20-00-410-055-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install, when removed,
(a) the forward galley units (refer to AMM chapter 25-31),
(b) the aft galley units (refer to AMM chapter 25-33).

Subtask 21-20-00-410-056-B ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install, when removed,
(a) the forward lavatory/ies (refer to AMM chapter 25-41),
(b) the aft lavatory/ies (refer to AMM chapter 25-43).

Subtask 21-20-00-410-055-B ** ON A/C NOT FOR ALL

D. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install, when removed,
(a) the forward galley units (refer to AMM chapter 25-31),
(b) the middle galley units (refer to AMM chapter 25-32) and,
(c) the aft galley units (refer to AMM chapter 25-33).

Subtask 21-20-00-410-056-A ** ON A/C NOT FOR ALL

E. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install, when removed,
(a) the forward lavatory/ies (refer to AMM chapter 25-41),
(b) the middle lavatory (refer to AMM 25-42) and,
(c) the aft lavatory/ies (refer to AMM chapter 25-43).

Subtask 21-20-00-410-057-A

F. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Install, when removed, the passenger compartment seats (refer to AMM chapter 25-21).
(3) Install the ceiling panels (Ref. AMM TASK 25-23-41-400-001).

Subtask 21-20-00-941-051-A

G. Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.03.31 23:00:44 UTC