Hand Polish and Blend Procedure [IAE]

TASK 70-42-11-300-010-A
Hand Polish and Blend Procedure

1. Reason for the Job
Self explanatory
2. Job Set-up
Subtask 70-42-11-869-050-A ** ON A/C NOT FOR ALL

A. General.

CAUTION: IT IS THE RESPONSIBILITY OF THE OPERATOR TO GET AND OBEY THE MANUFACTURERS MATERIAL SAFETY DATA SHEETS FOR CONSUMABLE MATERIALS INFORMATION SUCH AS, HAZARDOUS INGREDIENTS, PHYSICAL/CHEMICAL CHARACTERISTICS, FIRE, EXPLOSION, REACTIVITY, HEALTH HAZARD DATA, PRECAUTIONS FOR SAFE HANDLING, USE AND CONTROL PROCEDURES AND TO OBEY LOCAL REGULATIONS.

(1) This Standard Practice must only be applied when given in the related Inspection/Check TASK.
(2) Parts repaired to this Standard Practice must be repaired as near to their initial shape and surface condition as possible. The parts must not be more than the worn dimension limits given in the related Inspection/Check TASK.
(3) Standard workshop equipment is necessary for this procedure. Special tools are not necessary.
(4) For the material of components refer to the Illustrated Parts Catalogue.

3. Procedure
Subtask 70-42-11-220-050-A ** ON A/C NOT FOR ALL

A. Examine the Part to find the Level of Repair Necessary.
(1) Examine the part to get the length and the depth of damage:
(a) Refer to the related Inspection/Check TASK

Subtask 70-42-11-350-050-A ** ON A/C NOT FOR ALL

B. Repair the Damage.

CAUTION: ON TITANIUM COMPONENTS, ONLY SILICON CARBIDE TYPE WHEELS, STONES AND ABRASIVE PAPERS ARE TO BE USED FOR THIS REPAIR. ALUMINIUM OXIDE TYPES MUST NOT BE USED.

CAUTION: IF YOU USE MECHANICAL CUTTERS, MAKE ONLY SMALL CUTS TO PREVENT TOO MUCH HEAT.

(1) Repair scores, galling, burrs, pick-up and fretting.
(a) Tools and operation necessary.
1 hand tools
2 stone or light hand polish
(b) Carefully remove high points, burrs and pick-up together with pick-up on threats.
(c) Remove material to a maximum depth of 50 percent more than the depth of the score.
(d) Use abrasive paper which is applicable to the material and the surface finish necessary. Hand polish the repaired area to get the necessary surface finish.
(2) Repair of pitting, strip and rub marks.
(a) Tools and operation necessary.
1 hand tools
2 stone or light hand polish
(b) Stone or light hand polish to remove pitting.
(3) Repair distortion and dents.
(a) Tools and operation necessary.
1 hand tools
2 planish, make smooth or hand polish
(b) Remove distortion and dents.
(4) Repair of nicks
(a) Tools and operation necessary.
1 hand tools
2 hand polish to a smooth shape
(b) Scallop, make smooth and/or hand polish to remove nicks.
(c) Remove material to a minimum depth of 0.003 in. (0.08mm) below surface of the nick.
(d) Use abrasive paper which is applicable to the material and surface finish necessary. Hand polish the repaired area to get the necessary surface finish.
(5) Repair of burned areas.
(a) Tools and operation necessary.
1 hand tools
2 dress, make smooth and polish
(b) For the standards, refer to the related Inspection/Check TASK.
(6) Repair of cracks.
(a) Tools and operation necessary.
1 hand tools
2 make smooth, scallop and hand polish the damaged area.
(b) Make smooth, scallop and hand polish to the standards related in the Inspection/Check TASK.
(7) Repair of battering.
(a) Tools and operation necessary.
1 hand tools
2 make smooth the surface contour and hand polish.
(b) Make smooth the edges the battering marks.
(c) Scallop battering on leading or trailing edges. The scallop must be a 5 to 1 length/depth minimum ratio, then hand polish. Refer to the related Inspection/Check TASK.

Subtask 70-42-11-210-050-A ** ON A/C NOT FOR ALL

C. Examine the Repair Area.
(1) Examine and do a crack test.
(a) Refer to the related Inspection/Check TASK for the component repaired. This will give the procedure and instructions for the inspection and the crack test.

Subtask 70-42-11-350-051-A ** ON A/C NOT FOR ALL

D. Apply Surface Protection to the Repaired Area.
(1) Apply the surface protection as given in the applicable Manual Repair.

[Rev.10 from 2021] 2026.04.01 02:19:48 UTC