Installation of the Air Intake Cowl [CFMI]

TASK 71-11-00-400-040-A
Installation of the Air Intake Cowl

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.

WARNING: BE CAREFUL DURING THE REMOVAL/INSTALLATION OF THE AIR INTAKE COWL. IT WEIGHS 328 Lb (149 kg). IF IT FALLS, IT CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

CAUTION: ADJUST THE FAN COWL DOORS WHEN A NEW AIR INTAKE COWL IS INSTALLED. IF THE FAN COWL DOORS ARE NOT CORRECTLY ADJUSTED THE DOORS CAN OPEN IN FLIGHT.

CAUTION: THIS PART IS A REMOVABLE STRUCTURAL COMPONENT (RSC), WHICH CAN BE MOVED BETWEEN AIRCRAFT. THUS IT CAN HAVE DIFFERENT OPERATION CONDITIONS AND A DIFFERENT LIFE RECORD (FLIGHT HOURS/FLIGHT CYCLES/CALENDAR) FROM THE AIRCRAFT IT IS INSTALLED ON OR REMOVED FROM. THE OPERATOR IS RESPONSIBLE FOR THE SPECIFIC TRACKING AND CONTINUED AIRWORTHINESS OF REMOVABLE STRUCTURAL COMPONENTS. INCORRECT MAINTENANCE OF THESE COMPONENTS CAN CAUSE A RISK FOR THE FLIGHT SAFETY.

ZONE: 400
FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

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	PAD - UNIVERSAL ATTACH
No specific	AR	PLIERS - CONNECTOR, JAW, SOFT
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 360 and 340 lbf.in (4.07 and 3.84 m.daN )
No specific	Torque wrench: range to between 945 and 855 lbf.in (10.68 and 9.66 m.daN )
RSE1112	1	SLING INLET COWL
RSE1248	2	INDEX PIN-AIR INTAKE COWL

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP1039)	acetone
(Material No.CP1041)	isopropyl alcohol
(Material No.CP2011)	stoddard solvent
(Material No.CP2306)	3m tape no. 5490
(Material No.CP2559)	ardrox 552
(Material No.CP2560)	turco ind 79
(Material No.CP2566)	mag-chem tecksol
(Material No.CP2584)	degreasol 99 R
(Material No.CP2656)	mag-chem skysol

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 30-21-51-400-041-A	Installation of the Engine Air-Intake Anti-Ice Valve
TASK 71-13-00-010-040-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-A	Closing of the Fan Cowl Doors
TASK 71-13-00-800-040-A	Adjustment of the Fan Cowl Doors
SPM 702112
Air Intake Cowl
Torque Sequence Chart

3. Job Set-up
Subtask 71-11-00-860-051-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the 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) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

Subtask 71-11-00-010-058-A ** ON A/C NOT FOR ALL

B. Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR

4. Procedure
Subtask 71-11-00-110-050-A ** ON A/C NOT FOR ALL

A. Cleaning of the Temporary Protective Yellow Coating from the Nose Lip
Do this procedure before you install a new or spare inlet cowl:
(1) Use 2 in. (50.8 mm) maximum wide 3m tape no. 5490 (Material No.CP2306) around the circumferences of the leading edges of the inner and outer barrel panels to prevent solvent from discoloring panels.
(2) Prior to installation of the inlet cowl, clean the temporary protective coating off the nose lip. Use a clean cotton cloth made moist 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 tecksol (Material No.CP2566) or degreasol 99 R (Material No.CP2584) or mag-chem skysol (Material No.CP2656) SPM 702112.
(3) Wipe off unwanted acetone before it dries.
(4) Make sure that all of the protective coating has been removed. If not, do again this procedure until the coating is gone.

Subtask 71-11-00-020-054-A ** ON A/C NOT FOR ALL

B. Remove filler plugs of the hoist points from the air intake cowl (30). Keep the plugs for the installation after the air intake cowl is installed.

Subtask 71-11-00-480-053-A ** ON A/C NOT FOR ALL

C. Installation of the Tooling
(1) Install the PAD - UNIVERSAL ATTACH on the hoist points of the air intake cowl.
(2) Attach the RSE1112 SLING INLET COWL to the universal attach pads.
(3) Lift the sling until it supports the air intake cowl (30) weight.

Subtask 71-11-00-020-055-A ** ON A/C NOT FOR ALL

D. Disengagement of the Air Intake Cowl
(1) Remove the bolts (15), the washers (20), and the nuts (25), that attach the air intake cowl (30) to the dolly. Remove the top bolt and work down equally on each side.
(2) Pull the air intake cowl (30) forward to remove the index pin from the rotating ring of the dolly.
(3) Remove the protective covers from the flex hose, the anti-ice duct and cooling air ducts of the ECU.

Subtask 71-11-00-420-051-A ** ON A/C NOT FOR ALL

E. Installation of the Air Intake Cowl

CAUTION: DURING INSTALLATION OF THE AIR INTAKE COWL TAKE CARE NOT TO DAMAGE THE VISOR AT THE FORWARD PART OF THE PYLON.

(1) Lift the air intake cowl (30) to the engine and engage the index pin with the fan case.

Subtask 71-11-00-480-054-A ** ON A/C NOT FOR ALL

F. Install two RSE1248 INDEX PIN-AIR INTAKE COWL index pins (RSE1248-101) through the air intake cowl flange to align with the holes on the engine flange. Put the index pins 90 to 180 degrees apart.

NOTE: Because of the small space, the index pins must be installed from the forward side of the air intake cowl flange.

Subtask 71-11-00-420-053-B ** ON A/C NOT FOR ALL

G. Attachment of the Air Intake Cowl to the Fan Case
(1) Attach the air intake cowl (30) to the fan case with the bolts (15), the washers (20) and the nuts (25) in 19 places:
(a) Make sure that the cone side of the washers (20) is against the nuts (25).
(2) Attach the air intake cowl (30) to the fan case with the bolts (15) and the washers (40) in four places:
(a) Make sure that the cone side of the washers (40) is against the bolt (15) head.
(3) Attach the air intake cowl (30) to the fan case with the bolt (15), the washers (40) and (45), and the nut (25) in one location. Refer to location 9 of the figure:

Torque Sequence Chart ** ON A/C NOT FOR ALL

(a) Make sure that the cone side of the washers (40) and (45) is against the nut (25).
(4) Remove the RSE1248 INDEX PIN-AIR INTAKE COWL (RSE1248-101), as necessary, before all of the bolts (15) are installed.
(5) Torque the nuts (25) as follows:
(a) TORQUE the nuts (25) to between 360 and 340 lbf.in (4.07 and 3.84 m.daN )

.
Start with the nuts (25) in the 9 o'clock and 3 o'clock positions, then torque the nuts (25) in the sequence as shown in the figure:

Torque Sequence Chart ** ON A/C NOT FOR ALL

(b) TORQUE the nuts (25) again in the same sequence.

Subtask 71-11-00-080-052-A ** ON A/C NOT FOR ALL

H. Remove the sling and the universal attach pads from the air intake cowl (30).

Subtask 71-11-00-420-054-B ** ON A/C NOT FOR ALL

I. Installation of the Hardware.
(1) Install the filler plugs on the hoist points of the air intake cowl.
(2) Install the flex duct (35) and the clamp (10) to the cooling air duct of the air intake cowl.
(3) Install anti-ice control valve (5) of the air intake cowl (Ref. AMM TASK 30-21-51-400-041).

Subtask 71-11-00-420-055-B ** ON A/C NOT FOR ALL

J. Connection
(1) Remove the protective cover from the electrical connector and the T12 sensor unit and attach the connector to the sensor unit. Tighten the connector fingertight plus one-eighth turn using a PLIERS - CONNECTOR, JAW, SOFT.
(2) Install the Fan Case Right Side Harness Assembly in the brackets (two locations) on the air intake cowl.
(3) Remove the protective cover from the electrical connector 40001VC of the phone jack and the fan case receptacle and attach the connector to the receptacle. Tighten the connector fingertight plus one-eighth turn using a PLIERS - CONNECTOR, JAW, SOFT.
(4) Remove protective covers from the fire extinguisher tube on the pylon and the hose assembly on the air intake cowl. Connect the hose assembly to the pylon tube assembly. TORQUE the hose fitting to between 945 and 855 lbf.in (10.68 and 9.66 m.daN )

5. Close-up
Subtask 71-11-00-410-055-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 fan cowl doors (Ref. AMM TASK 71-13-00-410-040):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

Subtask 71-11-00-820-050-A ** ON A/C NOT FOR ALL

B. Do the adjustment of the fan cowl doors (Ref. AMM TASK 71-13-00-800-040).

[Rev.10 from 2021] 2026.04.02 06:31:54 UTC