W DOC AIRBUS | AMM A320F

Turning of the N2 Rotor [CFML]

TASK 72-00-00-820-803-A
Turning of the N2 Rotor

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.
ZONE: 400
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
WARNING NOTICE(S)
9471M47P02
2
ADAPTER, OFFSET - CRANK PAD
9471M90
1
SOFTWARE, PROGRAMMING - MOTOR
9481M92
1
ELECTRONIC TURNOVER TOOL
956A1610P01
2
CORE ENGINE ROTATION
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
400
POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 71-13-00-010-803-A
Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A
Closing of the Fan Cowl Doors
TASK 72-63-03-000-801-A
Removal of the Manual-Control Cover of the Accessory Gearbox (AGB)
TASK 72-63-03-400-801-A
Installation of the Manual-Control Cover of the Accessory Gearbox
F Turning of the N2 Rotor (Manually)
F Drive-Handle (3/4-Inch)
F Accessory Gearbox (AGB) Hand-Cranking Driver Distress
F Electronic Turnover Tool
3. Job Set-up
Subtask 72-00-00-941-213-A
A. Safety Precautions
   (1) On the center pedestal, on ENG panel 115VU:
     (a) Make sure that the ENG/MODE selector switch is in the NORM position.
     (b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
     (c) Put WARNING NOTICE(S) in position to tell persons not to operate:
  • The ENG/MODE selector switch, and
  • The ENG/MASTER 1(2) control switch.
   (2) On the ENG section of maintenance panel 50VU:
     (a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
     (b) Put a WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
Subtask 72-00-00-010-289-A
B. Get Access
   (1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
4. Procedure
Subtask 72-00-00-710-066-A
A. Turning of the N2 Rotor Manually
F Turning of the N2 Rotor (Manually)
CAUTION: DO NOT USE A TOOL TO PUT THE 3/4-INCH SQUARE DRIVE INTO THE GEAR SHAFT. THIS CAN CAUSE DAMAGE TO THE AGB BEARING.
   (1) Remove the manual control cover of the Accessory Gearbox (AGB) (Ref. AMM TASK 72-63-03-000-801).
     (a) Make sure that the tool is fully clean of foreign objects or dirt before you insert it into the gearbox drive pad.
   (2) Install the 956A1610P01 CORE ENGINE ROTATION in the drive pad of the manual control cover of the AGB.
F Drive-Handle (3/4-Inch)
   (3) Do a check of the hand-cranking driver to make sure that the gear shaft tangs are correctly aligned with their socket slots. If a misalignment is observed, please contact CFM.
F Accessory Gearbox (AGB) Hand-Cranking Driver Distress
   (4) Install the 9471M47P02 ADAPTER, OFFSET - CRANK PAD on the 956A1610P01 CORE ENGINE ROTATION.
   (5)
F Turning of the N2 Rotor (Manually)
NOTE: For better visibility of the hardware, N2 rotor is rotated in opposite direction than in engine operation.
   (6) Remove the 9471M47P02 ADAPTER, OFFSET - CRANK PAD of the 956A1610P01 CORE ENGINE ROTATION from the drive pad of the manual control cover of the AGB.
   (7) Remove the 956A1610P01 CORE ENGINE ROTATION.
   (8) Install the manual control cover of the AGB (Ref. AMM TASK 72-63-03-400-801).
Subtask 72-00-00-710-073-A
B. Alternative Solution - Turn the N2 rotor with 9481M92 ELECTRONIC TURNOVER TOOL as follows:
F Turning of the N2 Rotor (Manually)
   (1) Remove the manual control cover of the Accessory Gearbox (AGB) (Ref. AMM TASK 72-63-03-000-801).
NOTE: Make sure that the tool is fully clean of foreign objects or dirt before you insert it into the gearbox drive pad.
NOTE: Make sure that the 9471M90 SOFTWARE, PROGRAMMING - MOTOR is loaded onto the 9481M92 ELECTRONIC TURNOVER TOOL per the manufacturer's instructions. Use the manufacturer's assembly instructions to set up the 9481M92 ELECTRONIC TURNOVER TOOL for use.
   (2) Install the 956A1610P01 CORE ENGINE ROTATION, the 9471M47P02 ADAPTER, OFFSET - CRANK PAD and the 9481M92 ELECTRONIC TURNOVER TOOL to the drive pad of the manual control cover of the AGB.
F Electronic Turnover Tool
   (3) If the 9481M92 ELECTRONIC TURNOVER TOOL is used to identify the zero-index point, use the manufacturer supplied instructions to set the motoring tool display to zero degrees.
NOTE: Use the manufacturer's instructions to operate the drive motor in a counterclockwise direction as seen from the rear.
NOTE: For better visibility of the hardware, N2 rotor is rotated in opposite direction than in engine operation.
   (4) Remove the 9481M92 ELECTRONIC TURNOVER TOOL, the 9471M47P02 ADAPTER, OFFSET - CRANK PAD and the 956A1610P01 CORE ENGINE ROTATION from the drive pad of the manual control cover of the AGB.
   (5) Install the manual control cover of the AGB (Ref. AMM TASK 72-63-03-400-801).
5. Close-up
Subtask 72-00-00-410-249-A
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 71-13-00-410-803):
     (a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL 438AR
     (b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL 448AR
   (3) Remove the WARNING NOTICE(S).
[Rev.10 from 2021] 2026.04.01 02:50:24 UTC
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