Inspection of the HP Compressor Stage 3 Rotor Clapper [IAE]

TASK 72-00-00-210-012-A
Inspection of the HP Compressor Stage 3 Rotor Clapper

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

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	BRUSH - BRISTLED, STIFF
No specific	AR	SCRAPER - NON METALLIC
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )
IAE6F10408	1	EQUIPMENT-BORESCOPE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V04-004)	jointing compound
(Material No.V10-070)	anti-seize compound
(Material No.V10-072)	anti-seize compound
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

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

D. Referenced Information

REFERENCE	DESIGNATION
TASK 70-11-50-100-802-A	Local Swab or Wipe Cleaning with Solvent
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 72-00-00-080-010-A	Removal of the Rotator Kit for Borescope Inspection
TASK 72-00-00-200-016-B	Inspection of the HP Compressor
TASK 72-00-00-200-016-B-01	Inspection of the HP Compressor
TASK 72-00-00-480-010-A	Installation of the Rotator Kit for Borescope Inspection
TASK 72-00-00-860-010-A	Rotation of the HP Compressor with the Hand Turning Tool
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves
HP Compressor Borescope Access Ports (Underside)
Stage 3 Borescope Access Port
HP Compressor Blades
HPC Stage 3 Rotor Clappers

3. Job Set-up
Subtask 72-00-00-941-164-A ** ON A/C NOT FOR ALL

A. 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 72-00-00-010-231-A ** ON A/C NOT FOR ALL

B. Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

Subtask 72-00-00-040-117-A ** ON A/C NOT FOR ALL

C. Deactivate the thrust reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Deactivate the thrust reverser hydraulic control unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 72-00-00-010-232-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 72-00-00-010-233-A ** ON A/C NOT FOR ALL

E. Remove the borescope access port covers

HP Compressor Borescope Access Ports (Underside) ** ON A/C NOT FOR ALL

Stage 3 Borescope Access Port ** ON A/C NOT FOR ALL

NOTE: The borescope access ports give access to these stages of the compressor:

Port A gives access to the leading edge of stage 3. It is located 40 degrees below the engine horizontal on the left side.
Port B gives access to the trailing edge of stage 3 and the leading edge of stage 4. It is located 34 degrees below the engine horizontal on the right side.

(1) Remove the borescope access port covers A or B.
(a) Remove the bolts which attach the access port cover.
(b) Remove the access port cover.

Subtask 72-00-00-110-085-A ** ON A/C NOT FOR ALL

F. Remove the old jointing

CAUTION: MAKE SURE THAT NONE OF THE OLD JOINTING COMPOUND GOES IN TO THE ENGINE THROUGH THE ACCESS PORTS.

(1) Remove the old jointing compound from around the access ports and the access port covers.
(a) Use a SCRAPER - NON METALLIC and a clean Textile-Lint free Cotton - (Material No.14SBA1) made moist with a solvent from (Ref. AMM TASK 70-11-50-100-802) to remove all traces of old jointing compound (Ref. AMM TASK 70-11-50-100-802).

Subtask 72-00-00-480-079-A ** ON A/C NOT FOR ALL

G. Install the tool to turn the HP system (Ref. AMM TASK 72-00-00-480-010) or (Ref. AMM TASK 72-00-00-860-010).

Subtask 72-00-00-941-165-A ** ON A/C NOT FOR ALL

H. Prepare the borescope for use
(1) Prepare the IAE6F10408 EQUIPMENT-BORESCOPE for use as given in the maker's instructions.

4. Procedure
Subtask 72-00-00-480-080-A ** ON A/C NOT FOR ALL

A. Install the borescope probe.
(1) Carefully put the borescope probe into the access port of the stage of the compressor you want to examine.

NOTE: Use an 8 mm borescope probe for ports A and B.

Subtask 72-00-00-290-115-A ** ON A/C NOT FOR ALL

B. Inspection of the HPC stage 3 rotor clappers.

HP Compressor Blades ** ON A/C NOT FOR ALL

HPC Stage 3 Rotor Clappers ** ON A/C NOT FOR ALL

(1) Examine the HPC rotor clappers for wear

NOTE: The conditions that follow can apply when clappers look to be less than 50% aligned. Aligned clappers are at least 50% aligned with the contact surface.

NOTE: If evidence of clapper shingling is seen (Ref. AMM TASK 72-00-00-200-016).

NOTE: There can be gaps between the clapper faces and this can be acceptable. However, gaps can visually make the misalignment look worse.

NOTE: Be very careful when inspecting the wear and misalignment where there is a gap between clapper faces. If unsure, review from other angles to better assess alignment. The minimum recommendation for reviewing clappers is to inspect from two different angles to assess both the vertical and horizontal faces of the clappers.

(a) Reject the engine if you find clappers with cracks.
(b) Reject the engine if you find clappers with loss of material.
(c) Reject the engine within 10 cycles if you find clappers aligned with slanted wear.
(d) Reject the engine within 10 cycles if you find clappers with peeling of material that indicates clapper override (peeling of material on the clapper horizontal surface) or uniform heavy peeling along the full width of the clapper contact face indicating significant loss of hard coating.
(e) Accept the engine for 100 cycles if you find clappers aligned with advanced vertical regular, irregular or stepped wear.

NOTE: The engine must be removed in less than 500 cycles, if the clapper wear is found aligned with advanced vertical regular, irregular or stepped wear, refer to para (e).

(f) Accept the engine if you find clappers aligned with no wear or vertical wear only, including gaps between clappers.
(g) Accept the engine if you find clappers with mild vertical regular, irregular or stepped wear.

NOTE: It is recommended that operators digitally record evidence of inspections, either as videos or as photographs. Digital recording allows the previous condition to be reviewed when performing a repeat inspection, which will enable a better understanding of how the clappers are wearing.

5. Close-up
Subtask 72-00-00-080-070-A ** ON A/C NOT FOR ALL

A. Remove the support equipment
(1) Remove the borescope probe from the engine.
(2) Remove the tool used to turn the HP system (Ref. AMM TASK 72-00-00-080-010).

Subtask 72-00-00-410-196-A ** ON A/C NOT FOR ALL

B. Install the borescope access port covers

HP Compressor Borescope Access Ports (Underside) ** ON A/C NOT FOR ALL

Stage 3 Borescope Access Port ** ON A/C NOT FOR ALL

(1) Access ports A and B
(a) Apply a thin layer of jointing compound (Material No.V04-004) to the mating faces of the access ports and the access port covers using a BRUSH - BRISTLED, STIFF. Do not apply jointing compound nearer than 0.12 to 0.16 in. (3 to 4 mm) to the access port.
(b) Let the jointing compound dry for at least 10 minutes.
(c) Apply anti-seize compound (Material No.V10-070) or anti-seize compound (Material No.V10-072) to the screws which attach the access port cover.
(d) Install the access port cover and attach with the bolts.
(e) TORQUE the bolts to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(f) After at least two minutes, TORQUE the bolts again to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(g) Remove unwanted jointing compound from around the access port.

Subtask 72-00-00-410-197-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 72-00-00-440-114-A ** ON A/C NOT FOR ALL

D. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 72-00-00-410-198-A ** ON A/C NOT FOR ALL

E. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(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 13:00:31 UTC