Removal of the Core Nozzle Assembly [CFMB]

TASK 78-11-11-000-041-A
Removal of the Core Nozzle Assembly

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)

B. 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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-73-49-000-005-B	Removal of the Turbine Rear Frame TRF Drain Tube
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
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 78-11-11-040-050-A ** ON A/C NOT FOR ALL

A. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 78-11-11-941-051-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).

Subtask 78-11-11-010-051-A ** ON A/C NOT FOR ALL

C. Get Access
(1) Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Put the ACCESS PLATFORM 1M(3 FT) in position

Subtask 78-11-11-010-052-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser doors: (Ref. AMM TASK 78-36-00-010-040)
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR

4. Procedure
Subtask 78-11-11-020-050-B ** ON A/C NOT FOR ALL

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.

A. Removal of the core nozzle assembly.

NOTE: Foam can be put between the centerbody and the Core Nozzle Assembly

(1) Remove the Turbine Rear Frame (TRF) drain tube (20). (Ref. AMM TASK 71-73-49-000-005)
(2) Remove the bolts (25), washers (30), and nuts (10) that attach the core nozzle assembly (5) to the engine flange (88 locations).
(3) Remove the core nozzle assembly (5) from the engine.

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