Installation of the Core Nozzle Assembly [CFMB]

TASK 78-11-11-400-041-A
Installation of the Core Nozzle Assembly

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

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.

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	WARNING NOTICE(S)
No specific	Torque wrench: range to between 70 and 50 lbf.in (0.79 and 0.57 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2619)	Never Seez-Pure Nickel, Special

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

D. Referenced Information

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 71-73-49-400-005-B	Installation of the Turbine Rear Frame Drain Tube
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
Parts That Attach The Core Nozzle Assembly
Core Nozzle Assembly
Parts That Attach The Core Nozzle Assembly
Core Chevron Nozzle Assembly ** ON A/C NOT FOR ALL
Core Nozzle Assembly ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 78-11-11-860-050-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 78-11-11-010-054-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser doors are open: (Ref. AMM TASK 78-36-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR

Subtask 78-11-11-040-052-A ** ON A/C NOT FOR ALL

C. Make sure that the thrust reverser is unserviceable (Ref. AMM TASK 78-30-00-481-041).

4. Procedure
Subtask 78-11-11-420-050-B ** ON A/C NOT FOR ALL

A. Installation of the core nozzle assembly.

WARNING: THE CORE NOZZLE ASSEMBLY WEIGHS APPROXIMATELY 162 POUNDS (73,5 KG). MAKE SURE YOU SAFELY SUPPORT THE CORE NOZZLE ASSEMBLY AND KEEP IT AWAY FROM OTHER ENGINE PARTS.

(1) Carefully move the core nozzle assembly forward over the centerbody.
(2) Align the core nozzle assembly (5) with the aft engine flange. Make sure that the cutouts in the nozzle flange are aligned with the cutouts in the engine flange.
(3) Apply CP2619Never Seez-Pure Nickel, Special to the bolt (25) threads.

NOTE: Put the countersunk side of the washer against the head of the bolt.

(4) Attach the core nozzle (5) to the engine flange with the bolts (25), washers (30), and nuts (10) (88 locations). Do not torque the nuts at this time.
(5) Install the turbine rear frame drain tube (20). (Ref. AMM TASK 71-73-49-400-005)
(6) Adjust the core nozzle assembly (5) position so it is aligned for the best exhaust gas flowpath.
(7) TORQUE the nuts (10) to between 70 and 50 lbf.in (0.79 and 0.57 m.daN )

NOTE: Start with the nuts at the 3 o'clock and 9 o'clock positions. Then torque the nuts in sequence on opposite sides of the engine.

5. Close-up
Subtask 78-11-11-410-051-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) Close the thrust reverser cowl doors: (Ref. AMM TASK 78-36-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
(3) Remove the access platform(s).

Subtask 78-11-11-440-050-A ** ON A/C NOT FOR ALL

B. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).

Subtask 78-11-11-410-052-A ** ON A/C NOT FOR ALL

C. Close Access
(1) 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
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 13:00:14 UTC