Local Application of Fluorescent Penetrant Inspection [IAE]

TASK 70-23-05-230-010-A
Local Application of Fluorescent Penetrant Inspection

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	MAGNIFYING GLASS POWER 30X
No specific	AR	PAPER - TISSUE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-031)	Acetone, Technical grade
(Material No.V01-124)	Isopropyl Alcohol, Technical grade
(Material No.V02-099)	lint free cloth
(Material No.V06-030)	non-aqueous developer
(Material No.V06-032)	developer, dry

3. Job Set-up
Subtask 70-23-05-869-050-A ** ON A/C NOT FOR ALL

A. General

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

(1) This procedure details the requirements for the fluorescent penetrant inspection of small areas of a part (such as bosses, weld repair areas, rout-outs or grind-outs and blended areas). It is not for full-circumference (360 degrees) inspections (for example on flanges, seals, knife-edges) or to replace other comprehensive techniques (100 percent coverage methods).
(2) The penetrant sensitivity to be used will be specified in the applicable Aircraft Maintenance Manual task, Engine Manual task, or Component Maintenance Manual task. If the applicable Aircraft Maintenance Manual task, Engine Manual task or Component Maintenance Manual task does not specify the sensitivity, use the penetrant sensitivity that the Engine Manual or Component Maintenance Manual specifies for the initial inspection of the component. Unless specified differently, use ultra-high-sensitivity (Level 4) penetrant on major rotating parts (that is, on fan blades, compressor drums, disks and airseals and turbine disks, airseals, hubs, seal plates (full rings and segments) and shafts).
(3) AMS 2647 is to be included in these procedures.

4. Procedure
Subtask 70-23-05-110-050-A ** ON A/C NOT FOR ALL

A. Cleaning of the area to be inspected

NOTE: Clean the part as specified in the engine manual. If the engine manual does not specify a cleaning procedure, use the procedure that follows.

(1) Clean the area to be inspected with clean PAPER - TISSUE or lint free cloth (Material No.V02-099) a clean soaked in V01-031Acetone, Technical grade or V01-124Isopropyl Alcohol, Technical grade. Do not let the solvent run over or flood any surface.
(2) Let the solvent drain or evaporate fully. If necessary, wipe carefully with a lint free cloth (Material No.V02-099) or PAPER - TISSUE to remove the excess solvent.

Subtask 70-23-05-230-050-A ** ON A/C NOT FOR ALL

B. Local Application of Fluorescent Penetrant Inspection
(1) Apply the penetrant.
(a) Make sure that the parts are dry and free from contamination or surface layer. Contamination or surface layer will decrease the defect indications.
1 To get the best results from the penetrant inspection procedure, the parts must always be fully cleaned.
2 Surface contamination will cause the penetrant to stay on the surface, which will give incorrect indications.
3 Contamination in the defect will limit or stop the entry of the penetrant, which will decrease the defect indications.
(b) Mask the adjacent areas with masking tape, as necessary, where penetrant is unwanted.

NOTE: Parts must be dry and cool (49 deg.C (120.2 deg.F) maximum or cool enough to touch by hand) before you apply the penetrant, to prevent damage to the penetrant liquid.

(c) Apply the specified penetrant by brush or spray, to the area to be examined. This step must be done in ultra-violet light to make sure that the area to be examined is correctly covered. The contact time must not be less than 20 minutes and not more than 60 minutes.
(2) Remove the unwanted penetrant.

CAUTION: REMOVE PENETRANT IN ULTRA-VIOLET LIGHT.

(a) Remove the unwanted penetrant with PAPER - TISSUE or lint free cloth (Material No.V02-099) made moist with V01-031Acetone, Technical grade or V01-124Isopropyl Alcohol, Technical grade.

NOTE: The area must be cleaned to the point where only the surface penetrant is removed. Do not let the solvent run over or flood the surface. This step must be done in ultra-violet light.

(b) Dry the area with a dry lint free cloth (Material No.V02-099) or a blast of dry compressed air at a maximum pressure of 25 psi (1.73 bar) at a distance of 12 in. (30.48 cm) from the part.
(3) Apply one of the developers as follows:
(a) Apply V06-032developer, dry by a blow dispenser or by dusting and permit the developer absorb the penetrant for 10 minutes.
(b) Apply non-aqueous developer (Material No.V06-030) by spray, in a uniform layer which is thick enough to be visible, but not thick enough to obscure the color of the part. Let the developer absorb the penetrant for 20 minutes minimum.
(4) Examine the part.
(a) Visually examine the area after the necessary development time under ultra-violet light. Mark the location of indications by a suitable method. If crack indications are present, use a 10x magnification to make a decision on the type of crack indications.

NOTE: Parts must be examined in two hours. If more than two hours have passed, the parts must be cleaned and the penetrant must be applied again.

(b) If necessary to identify the type of indications, do again a check for crack indications, with MAGNIFYING GLASS POWER 30X under white light.

NOTE: Some defects seen by penetrant inspection cannot be seen under white light. If this occurs, get metallurgical assistance.

(c) Remove the remaining developer in the cases that follow:
1 For parts with no areas of entrapment that are to go to visual/dimensional inspection or engine assemble, blow off any remaining developer with a blast of clean, dry compressed air, if necessary.
2 For parts that can cause entrapment of dry developer, flush with hot water to clean.
3 If a non-aqueous developer was used, remove the developer.
(d) Apply protection against corrosion, if necessary with temporary protection.

[Rev.10 from 2021] 2026.04.01 02:19:30 UTC