Installation of the Fan Duct Panels [CFMB]
TASK 72-23-00-400-027-A
Installation of the Fan Duct Panels
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 72-23-00-860-060-A ** ON A/C NOT FOR ALL
Subtask 72-23-00-420-063-A ** ON A/C NOT FOR ALL
Subtask 72-23-00-410-080-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 12:59:50 UTC
Installation of the Fan Duct Panels
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 | ACCESS PLATFORM 1M(3 FT) |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 95 and 85 lbf.in (1.07 and 0.96 m.daN ) ![]() |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP1039) | acetone |
| (Material No.CP1041) | isopropyl alcohol |
| (Material No.CP2011) | stoddard solvent |
| (Material No.CP2101) | graphite grease |
| (Material No.CP2559) | ardrox 552 |
| (Material No.CP2560) | turco ind 79 |
| (Material No.CP2566) | mag-chem teksol |
| (Material No.CP2584) | degreasol 99 R |
| (Material No.CP2656) | mag-chem skysol |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-040-B | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-040-B | Closing of the Fan Cowl Doors |
| TASK 78-30-00-081-041-B | Make the Thrust Reverser Serviceable after Maintenance |
| TASK 78-30-00-481-041-B | Make the Thrust Reverser Unserviceable for Maintenance |
| TASK 78-36-00-010-040-B | Opening of the Thrust Reverser Doors |
| TASK 78-36-00-410-040-B | Closing of the Thrust Reverser Doors |
Subtask 72-23-00-860-060-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) On the center pedestal, on ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) is off.
(3) Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(4) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
Subtask 72-23-00-010-100-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) is off.
(3) Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(4) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(4) Make sure that the thrust reverser doors are open (Ref. AMM TASK 78-36-00-010-040):
(5) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(6) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 72-23-00-040-069-A ** ON A/C NOT FOR ALL Subtask 72-23-00-420-074-A ** ON A/C NOT FOR ALL (1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(4) Make sure that the thrust reverser doors are open (Ref. AMM TASK 78-36-00-010-040):
(5) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(6) FOR [1000EM2] (ENGINE-2)
461AL 462AR
D. Before you install the fan duct panels, make sure that the Variable Bleed Valve (VBV) slides (10), (20) and (30) are in their correct locations.
(1) If not, do as follows:
(a) Installation of the slides (10), (20) and (30) in the VBV cavities (Ref. FIG 401/Sheet 2)
1 Make sure that the VBVs (70) are in the closed position.
2 Remove the slides (10), (20) and (30) that are in their related cavities.
3 Install the slides (10), (20) and (30) in their related positions.
a Put each slide in its related cavity.
b Fit the slots of the rubber seal (60) of the slide onto the heads of the scoop attachment bolts (50). To do this, use a locally-manufactured plastic rod (Ref. FIG 401/Sheet 3 and Sheet 4).
4. Procedure(1) If not, do as follows:
(a) Installation of the slides (10), (20) and (30) in the VBV cavities (Ref. FIG 401/Sheet 2)
1 Make sure that the VBVs (70) are in the closed position.
2 Remove the slides (10), (20) and (30) that are in their related cavities.
3 Install the slides (10), (20) and (30) in their related positions.
a Put each slide in its related cavity.
b Fit the slots of the rubber seal (60) of the slide onto the heads of the scoop attachment bolts (50). To do this, use a locally-manufactured plastic rod (Ref. FIG 401/Sheet 3 and Sheet 4).
Subtask 72-23-00-420-063-A ** ON A/C NOT FOR ALL
A. Installation of the fan duct panels.
(1) Clean the fan frame cavity and the fan duct panels with acetone (Material No.CP1039) or isopropyl alcohol (Material No.CP1041) or stoddard solvent (Material No.CP2011) or ardrox 552 (Material No.CP2559) or turco ind 79 (Material No.CP2560) or mag-chem teksol (Material No.CP2566) or degreasol 99 R (Material No.CP2584) or mag-chem skysol (Material No.CP2656) at the RTV contact area between the fan frame /fan duct panel.
(2) Install the captive screws (150) the washers (180) and the retaining bushings (170) on the fan duct panel (160).
(3) Apply a thin layer of graphite grease (Material No.CP2101) to the threads of the screws (150), and install the panel (160).
(4) Install the panel on the bleed valve cavity and attach it with captive screws.
(5) TORQUE screws to between 95 and 85 lbf.in (1.07 and 0.96 m.daN )
.
5. Close-up(1) Clean the fan frame cavity and the fan duct panels with acetone (Material No.CP1039) or isopropyl alcohol (Material No.CP1041) or stoddard solvent (Material No.CP2011) or ardrox 552 (Material No.CP2559) or turco ind 79 (Material No.CP2560) or mag-chem teksol (Material No.CP2566) or degreasol 99 R (Material No.CP2584) or mag-chem skysol (Material No.CP2656) at the RTV contact area between the fan frame /fan duct panel.
(2) Install the captive screws (150) the washers (180) and the retaining bushings (170) on the fan duct panel (160).
(3) Apply a thin layer of graphite grease (Material No.CP2101) to the threads of the screws (150), and install the panel (160).
(4) Install the panel on the bleed valve cavity and attach it with captive screws.
(5) TORQUE screws to between 95 and 85 lbf.in (1.07 and 0.96 m.daN )
. Subtask 72-23-00-410-080-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) Close the thrust reverser door (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 72-23-00-440-060-A ** ON A/C NOT FOR ALL Subtask 72-23-00-410-089-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser door (Ref. AMM TASK 78-36-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Fan Duct Panel