* * * FOR ALL
TASK 72-58-40-100-801
1 . General.
A.This procedure gives instructions to clean the mid fan shaft. Refer to Figure 601.
  •
Mid fan shaft (01-010 , 72-58-00) (SIN 810A0)
  •
Mid fan shaft (01-011 , 72-58-00) (SIN 810A0)
  •
Mid fan shaft (01-012 , 72-58-00) (SIN 810A0)
  •
Mid fan shaft (01-013 , 72-58-00) (SIN 810A0)
  •
Mid fan shaft (01-014 , 72-58-00) (SIN 810A0).
2 . Tools, Equipment, and Materials.
NOTE:
You can use equivalent alternatives for tools, equipment, and consumable materials.
A.Tools and Equipment.
(1)Special Tools. None.
(2)Standard Tools and Equipment. None.
(3)Locally Manufactured Tools. None.
B.Consumable Materials.
 
Code No.
Description
 
C10-021
Tape, Plastic
 
C10-097
Brushes, Wire
 
--
Pencil Type Grind Stone
C.Referenced Procedures.
 
ATA No.
Description
 
70-21-03
Steam Cleaning
 
70-21-04
Dry Abrasive Blast Cleaning
 
70-21-14
Manually-Assisted Detergent Cleaning
 
70-21-22
Light Duty Aqueous Cleaning
 
70-23-02
Stripping Inorganic Bonded Aluminum Paint
D.Expendable Parts. None.
3 . General Cleaning.
Subtask 72-58-40-160-001
A.Alternative Procedures Available. Steam clean the mid fan shaft. Refer to TASK 70-21-03-160-001 (CLEANING METHOD 3 - STEAM CLEANING).
Subtask 72-58-40-110-001
A.A.Alternative Procedure. Manually-assisted detergent clean the mid fan shaft. Refer to TASK 70-21-14-110-012 (CLEANING METHOD 14 - MANUALLY-ASSISTED DETERGENT CLEANING).
Subtask 72-58-40-110-002
A.B.Alternative Procedure. Light duty aqueous clean the mid fan shaft. Refer to TASK 70-21-22-110-042 (CLEANING METHOD 22 - LIGHT DUTY AQUEOUS CLEANING (Method 1)).
Subtask 72-58-40-110-003
A.C.Alternative Procedure. Light duty aqueous clean the mid fan shaft. Refer to TASK 70-21-22-110-050 (CLEANING METHOD 22 - LIGHT DUTY AQUEOUS CLEANING (Method 2)).
Subtask 72-58-40-120-004
A.D.Alternative Procedure. Dry abrasive blast clean the mid fan shaft with shells, rice hulls or wheat starch. Refer to TASK 70-21-04-120-B01 (DRY ABRASIVE BLAST CLEANING METHOD 4B).
Subtask 72-58-40-120-005
A.E.Alternative Procedure. Dry abrasive blast clean the mid fan shaft with shells, rice hulls or wheat starch. Refer to TASK 70-21-04-120-d01 (Dry Abrasive Blast Cleaning Method 4D).
Subtask 72-58-40-120-006
A.F.Alternative Procedure. Dry abrasive blast clean the mid fan shaft with plastic media. Refer to TASK 70-21-04-120-E01 (DRY ABRASIVE BLAST CLEANING METHOD 4E).
* * * FOR ALL
* * * PRE SB   72-0040( Everlube 9002 Mid Fan Shaft - Non-PIP Configuration )
* * * PRE SB   72-0114( Everlube 9002 Mid Fan Shaft )
Figure 601   (Sheet 1 ) Mid Fan Shaft - Cleaning
* * * FOR ALL
* * * SB   72-0040( Molydag 254N Mid Fan Shaft - PIP Configuration )
* * * SB   72-0114( Molydag 254N Mid Fan Shaft )
Figure 601   (Sheet 2 ) Mid Fan Shaft - Cleaning
* * * FOR ALL
* * * SB   72-0300
* * * SB   72-0319
Figure 601   (Sheet 3 ) Mid Fan Shaft - Cleaning
* * * FOR ALL
Figure 601   (Sheet 4 ) Mid Fan Shaft - Cleaning
4 . Removal of Surface Coating For Magnetic Particle Inspection.
Refer to Figure 601.
Subtask 72-58-40-120-001
A.Alternative Procedures Available. Remove the dry film lubricant from the mid fan shaft with shells, rice hulls, or wheat starch. Refer to TASK 70-21-04-120-b01 (Dry Abrasive Blast Cleaning Method 4B).
Subtask 72-58-40-120-002
A.A.Alternative Procedure. Remove the dry film lubricant from the mid fan shaft with shells, rice hulls or wheat starch. Refer to TASK 70-21-04-120-d01 (Dry Abrasive Blast Cleaning Method 4D).
Subtask 72-58-40-120-003
A.B.Alternative Procedure. Remove the dry film lubricant from the mid fan shaft with plastic media. Refer to TASK 70-21-04-120-e01 (Dry Abrasive Blast Cleaning Method 4E).
NOTE:
Remaining material can be removed by steel C10-097   wire brushes and pencil type grind stone which is 800 grid or finer.
Subtask 72-58-40-110-004
* * * PRE SB   72-0300
* * * PRE SB   72-0319
CAUTION:
DO THE INSPECTION IN 24 HOURS OR LESS AFTER THE REMOVAL OF THE ALUMINIUM COATING FOR EACH SERMETEL W OR SERMETEL 192 FROM THE MID FAN SHAFT, BECAUSE THE FAN DRIVE SHAFT WILL CORRODE.
B.Strip the aluminum coating from the mid fan shaft. Refer to TASK 70-23-02-110-019 (STRIPPING METHOD NO. 2 - STRIPPING INORGANIC BONDED ALUMINUM PAINT).
(1)If necessary, apply masking to threaded and thermal sprayed areas.
(2)Remove the aluminum coat from the shaft.
NOTE:
The dry film lubricant on the shaft including the shank nuts is automatically removed when it is soaked into the stripping solution. Application of new solid film lubricant on the shaft including the shank nuts is necessary.
Subtask 72-58-40-120-009
(3)If residual coating is observed, use mechanical aids such as wire brush or polishing pad to assist the removal. Plastic media blasting is permitted. Refer to TASK 70-21-04-120-E01 (DRY ABRASIVE BLAST CLEANING METHOD 4E).
* * * END PRE SB   72-0300
* * * END PRE SB   72-0319
Subtask 72-58-40-120-010
* * * SB   72-0300
* * * SB   72-0319
C.Alternative Procedure Available. Strip the seal coat from the mid fan shaft.
(1)Remove the seal coat by grit blasting. Refer to TASK 70-21-04-120-A01 (DRY ABRASIVE BLAST CLEANING METHOD 4A).
NOTE:
It is not necessary to completely remove the seal coat. It is expected to peel off when soaked in the stripping solution for aluminum coating removal.
(a)Apply masking to the adjacent threaded areas, spline thermal sprayed areas and surfaces that do not have coating to prevent damage to the threads, thermal sprayed coatings, and bare metal.
Subtask 72-58-40-120-011
C.A.Alternative Procedure. Strip the seal coat from the mid fan shaft.
(1)Remove the seal coat by sanding or scraping.
NOTE:
It is not necessary to completely remove the seal coat. It is expected to peel off when soaked in the stripping solution for aluminum coating removal.
Subtask 72-58-40-110-013
CAUTION:
DO THE INSPECTION IN 24 HOURS OR LESS AFTER THE REMOVAL OF THE ALUMINIUM COATING FOR EACH SERMETEL W OR SERMETEL 192 FROM THE MID FAN SHAFT, BECAUSE THE FAN DRIVE SHAFT WILL CORRODE.
D.Strip the aluminum coating from the mid fan shaft. Refer to TASK 70-23-02-110-019 (STRIPPING METHOD NO. 2 - STRIPPING INORGANIC BONDED ALUMINUM PAINT).
(1)If necessary, apply masking to thermal sprayed areas.
(2)Remove the aluminum coating from the shaft.
NOTE:
The dry film lubricant on the shaft including the shank nuts is automatically removed when it is soaked into the stripping solution. Application of new dry film lubricant on the shaft including the shank nuts is necessary.
Subtask 72-58-40-120-012
(3)If residual coating is observed, use mechanical aids such as wire brush or polishing pad to assist the removal. Plastic media blasting is permitted. Refer to TASK 70-21-04-120-E01 (DRY ABRASIVE BLAST CLEANING METHOD 4E).
* * * END SB   72-0300
* * * END SB   72-0319
* * * FOR ALL
Figure 602   Mid Fan Shaft - Blast Cleaning
5 . Cleaning of the fan mid shaft with corrosion rust on the Area L (including mounting flange bolthole, air seal flange bolthole, and air hole).
Refer to Figure 602.
Subtask 72-58-40-120-008
CAUTION:
DO NOT REMOVE MORE THAN 0.00098 INCH (0.0250 MM) OF PARENT MATERIAL OR DAMAGE TO THE PART CAN OCCUR.
CAUTION:
METHOD 4A OF DRY ABRASIVE BLAST CLEANING IS PERMITTED ONLY FOR AREA L (INCLUDING MOUNTING FLANGE BOLTHOLE, AIR SEAL FLANGE BOLTHOLE, AND AIR HOLE).
A.Dry abrasive blast clean the mid fan shaft with aluminum oxide. Refer to TASK 70-21-04-120-A01 (DRY ABRASIVE BLAST CLEANING METHOD 4A).
(1)Apply C10-021   plastic tape to the threaded areas and adjacent surfaces that do not require blasting.
NOTE:
A locally manufactured fixture can be used as an alternative to the C10-021   plastic tape.
(2)Grit blast the rust area.
NOTE:
Deleted.
NOTE:
Deleted.