DOC AIRBUS | AMM A320FSPOP 70 - Fluorescent Penetrant Inspection (FPI) - Local Application [PW11]
TASK 70-25-00-910-801-A
SPOP 70 - Fluorescent Penetrant Inspection (FPI) - Local Application
This procedure gives general instructions for local application of Fluorescent Penetrant Inspection (FPI).
SPOP 70 is for the inspection of the small areas of a part (such as bosses, weld repaired areas, rout-outs or grind-outs and blended areas). It is not for full circumference (360-degree) inspections (for example on flanges, seals, knife-edges) or to replace a 100-percent inspection.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 70-25-00-869-050-A ** ON A/C NOT FOR ALL
Subtask 70-25-00-910-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:20:20 UTC
SPOP 70 - Fluorescent Penetrant Inspection (FPI) - Local Application
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobThis procedure gives general instructions for local application of Fluorescent Penetrant Inspection (FPI).
SPOP 70 is for the inspection of the small areas of a part (such as bosses, weld repaired areas, rout-outs or grind-outs and blended areas). It is not for full circumference (360-degree) inspections (for example on flanges, seals, knife-edges) or to replace a 100-percent inspection.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | LIGHT SOURCE - ULTRA-VIOLET |
| No specific | 1 | TAPE - MASKING |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.P05-005) | lint-free cotton cloth |
| (Material No.P05-032) | Fluorescent Penetrant |
| (Material No.P05-234) | Fluorescent Penetrant |
| (Material No.P05-235) | Fluorescent Penetrant |
| (Material No.P05-236) | Fluorescent Penetrant |
| (Material No.P05-237) | PMC 4357 fluorescent penetrant developer |
| (Material No.P05-424) | Fluorescent Penetrant |
| (Material No.P05-469) | developer, dry |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-27-00-910-804-A | SPOP 208 - Degreasing of Parts by Solvent Wiping |
Subtask 70-25-00-869-050-A ** ON A/C NOT FOR ALL
A. Not Applicable
4. ProcedureSubtask 70-25-00-910-050-A ** ON A/C NOT FOR ALL
A. General Instructions
Subtask 70-25-00-110-050-A ** ON A/C NOT FOR ALL WARNING:
DURING INSPECTION, DO NOT WEAR EYE GLASSES THAT HAVE LENSES WHICH DARKEN WHEN THEY ARE IN ULTRA-VIOLET LIGHT.
CAUTION:
DO NOT USE A VISIBLE DYE PENETRANT ON AN ENGINE PART BEFORE YOU INSPECT THE PART WITH FLUORESCENT PENETRANT. FLUORESCENT PENETRANTS AND VISIBLE DYE PENETRANTS ARE NOT COMPATIBLE WITH EACH OTHER. THE ABSORPTION OF VISIBLE DYE PENETRANT WILL MASK INDICATIONS AND DECREASE THE SENSITIVITY OF THE FLUORESCENT PENETRANT INSPECTION.
(1) Always use "ultra" high-sensitivity (Level 4) penetrant when you do SPOP 70 on major rotating parts (that is, fan blades, compressor blades, drums, disks, airseals, and hubs and turbine disks, airseals, hubs, seal plates (full rings and segments) and shafts). In some tasks the "ultra" high-sensitivity penetrant is not specified on these major rotating parts. Service experience shows that "ultra" high-sensitivity penetrant must be used (instead of high) on all major rotating parts. B. Cleaning Instructions
(1) Wipe the inspection area with a lint-free cotton cloth (Material No.P05-005) with a solvent from SPOP 208 to remove all unwanted material (Ref. AMM TASK 70-27-00-910-804).
(2) Do not let the solvent run over or flood any surface.
Subtask 70-25-00-230-050-A ** ON A/C NOT FOR ALL (1) Wipe the inspection area with a lint-free cotton cloth (Material No.P05-005) with a solvent from SPOP 208 to remove all unwanted material (Ref. AMM TASK 70-27-00-910-804).
(2) Do not let the solvent run over or flood any surface.
C. Inspection Instructions
(1) Mask the adjacent area with TAPE - MASKING masking tape, as necessary to prevent penetrant contamination where it is not wanted.
(2) Apply the applicable penetrant (normal, high or ultra high sensitivity), as specified by the specific AMM maintenance task, with a lint-free cotton cloth (Material No.P05-005) for 20 to 60 minutes.
(a) Do not mix different types or brands of penetrant.
(b) Normal Penetrants
1 Fluorescent Penetrant (Material No.P05-234) (Post-Emulsified)
2 Fluorescent Penetrant (Material No.P05-424) (Water Washable).
(c) High Sensitivity Penetrants
1 Fluorescent Penetrant (Material No.P05-032) (Post-Emulsified)
2 Fluorescent Penetrant (Material No.P05-236) (Water Washable).
(d) Ultra High Sensitivity Penetrants
1 Fluorescent Penetrant (Material No.P05-235) (Post-Emulsified).
(3) Wipe surfaces with a lint-free cotton cloth (Material No.P05-005) and a SPOP 208 solvent to remove surface penetrant (Ref. AMM TASK 70-27-00-910-804). Use the SPOP 208 solvent only to moisten the wiper and only if necessary. Do not let the solvent run over or flood any surface.
(4) Use the LIGHT SOURCE - ULTRA-VIOLET to make sure that there is no more penetrant on the surface.
(5) Very lightly apply one of the developers that follows:
(a) PMC 4357 fluorescent penetrant developer (Material No.P05-237) (Non-aqueous)
1 If this non-aqueous developer is used, apply a constant thickness of the non-aqueous developer. You must see the developer and the color of the part.
(b) Dry Developer
1P05-469 developer, dry
(6) Let the developer absorb the penetrant for a minimum of 10 minutes.
(7) Examine the part as follows:
(8) If any area shows moderate fluorescent background or any marginally unacceptable or questionable indication, continue as follows:
(a) Lightly rub the area with a lint-free cotton cloth (Material No.P05-005) with a solvent from SPOP 208 (Ref. AMM TASK 70-27-00-910-804). Do not let the solvent run over or flood any surface.
(b) Let the solvent evaporate from the surface, and then examine the area again under ultraviolet light.
(c) If the indication immediately shows again, examine the indication.
(d) If the indication does not immediately show again, then apply theP05-469 developer, dry
(9) Remove the developer (Ref. AMM TASK 70-27-00-910-804).
(b) For parts that can cause entrapment of dry developer, flush with hot water to clean.
(c) If a non-aqueous developer was used, remove by the SPOP 208 Solvent Wipe Method (Ref. AMM TASK 70-27-00-910-804).
(1) Mask the adjacent area with TAPE - MASKING masking tape, as necessary to prevent penetrant contamination where it is not wanted.
(2) Apply the applicable penetrant (normal, high or ultra high sensitivity), as specified by the specific AMM maintenance task, with a lint-free cotton cloth (Material No.P05-005) for 20 to 60 minutes.
(a) Do not mix different types or brands of penetrant.
(b) Normal Penetrants
1 Fluorescent Penetrant (Material No.P05-234) (Post-Emulsified)
2 Fluorescent Penetrant (Material No.P05-424) (Water Washable).
(c) High Sensitivity Penetrants
1 Fluorescent Penetrant (Material No.P05-032) (Post-Emulsified)
2 Fluorescent Penetrant (Material No.P05-236) (Water Washable).
(d) Ultra High Sensitivity Penetrants
1 Fluorescent Penetrant (Material No.P05-235) (Post-Emulsified).
(3) Wipe surfaces with a lint-free cotton cloth (Material No.P05-005) and a SPOP 208 solvent to remove surface penetrant (Ref. AMM TASK 70-27-00-910-804). Use the SPOP 208 solvent only to moisten the wiper and only if necessary. Do not let the solvent run over or flood any surface.
(4) Use the LIGHT SOURCE - ULTRA-VIOLET to make sure that there is no more penetrant on the surface.
(5) Very lightly apply one of the developers that follows:
(a) PMC 4357 fluorescent penetrant developer (Material No.P05-237) (Non-aqueous)
1 If this non-aqueous developer is used, apply a constant thickness of the non-aqueous developer. You must see the developer and the color of the part.
(b) Dry Developer
1
(6) Let the developer absorb the penetrant for a minimum of 10 minutes.
(7) Examine the part as follows:
CAUTION:
YOU MUST DO THIS INSPECTION IN A DARK AREA. WHITE LIGHT MUST NOT BE MORE THAN 2 FOOTCANDLES (20 LUX) AT THE INSPECTION SURFACE. TO MAKE THE AREA DARK, YOU CAN COVER IT WITH A BLACK SHEET.
(a) Examine the part under ultraviolet light for indications. (8) If any area shows moderate fluorescent background or any marginally unacceptable or questionable indication, continue as follows:
(a) Lightly rub the area with a lint-free cotton cloth (Material No.P05-005) with a solvent from SPOP 208 (Ref. AMM TASK 70-27-00-910-804). Do not let the solvent run over or flood any surface.
(b) Let the solvent evaporate from the surface, and then examine the area again under ultraviolet light.
(c) If the indication immediately shows again, examine the indication.
(d) If the indication does not immediately show again, then apply the
NOTE: No cracks are permitted unless specified differently by an AMM task.
(e) Use this evaluation procedure only once on an indication. (9) Remove the developer (Ref. AMM TASK 70-27-00-910-804).
NOTE: Removal of developer is necessary only if it interferes with a subsequent process or part function.
(a) For parts with no areas of entrapment that are to go to visual/dimensional inspection, blow off any remaining developer, if necessary. (b) For parts that can cause entrapment of dry developer, flush with hot water to clean.
(c) If a non-aqueous developer was used, remove by the SPOP 208 Solvent Wipe Method (Ref. AMM TASK 70-27-00-910-804).