SAE AMS 2647B (R) Fluorescent Penetrant Inspection Aircraft and Engine Component Maintenance

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SAE AMS 2647B Document Information:

Title
(R) Fluorescent Penetrant Inspection Aircraft and Engine Component Maintenance

SAE International

Publication Date:
Oct 1, 1999

Scope:

1. SCOPE:

1.1 Purpose:

This specification details requirements and procedures for the detection of defects in aircraft and engine components during maintenance and overhaul operations.

1.2 Basis of Application:

This process has been used typically by maintenance and overhaul facilities to inspect aircraft and engine components and associated accessories when fluorescent penetrant inspection is specified, but usage is not limited to such applications.

1.2.1 There are areas in this document that may require specific direction from the OEM or cognizant engineering organization. This direction shall be provided in the part material specification for each part (see 8.2.47) in the following areas:

1.2.1.1 Etching Requirements: If not specified, etching will not be performed (See 3.4.5.1).

1.2.1.2 Cleaning Requirements: If not specified, solvent cleaning using Isopropyl Alcohol, Acetone or Methyl Ethyl Ketone (see 3.4) or an approved QPL AMS 2644 is acceptable.

1.2.1.3 Surface Coating Removal: If not specified, parts will be inspected with the surface coating intact (See 3.4.4 and 3.4.4.1).

1.2.1.4 Penetrant Sensitivity Level: If not specified, Sensitivity Level 3 penetrants shall be used on all airframe hardware and components and Sensitivity Level 4 penetrants shall be used on all Major Rotating Engine hardware and Auxiliary Power Unit hardware and components.

1.2.1.5 Pentrant Method: If not specified, Type I, Methods A, C or D penetrants may be used except for major rotating engine hardware which shall only be inspected using Type I, Methods C or D penetrants.

1.2.1.6 Developer: If not specified, dry developer (form a) will be used.

1.2.1.7 Inspection Coverage: If not specified, the areas described in 3.5.12 shall be inspected. If inspection of areas requiring special equipment or techniques (i.e. UV borescopes or light sources, special material application or removal devices, part handling fixtures, part masking, etc.) is necessary, detailed instructions must be provided. When specific areas of parts require intensified inspection scrutiny, due to either their critical nature or past history of failure, this information must be included in the repair or inspection manual or document.

1.2.1.8 Processing Parameters: Shall be as specified within this document. If approved by the OEM, different processing parameters, other than those specified herein, may be used.

1.3 Classification of Penetrant Systems:

Applicable fluorescent penetrant systems are classified into the following Methods and Sensitivity Levels:

Fluorescent dye

Method A: Water-Washable

Method B: Post Emulsifiable, Lipophilic

Method C: Solvent Removable

Method D: Post Emulsifiable, Hydrophilic

Sensitivity Level 2: Medium

Sensitivity Level 3: High

Sensitivity Level 4: Ultra-high

NOTE: Developer forms are listed in 3.1.4.

1.4 Safety - Hazardous Materials:

While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved.

1.4.1 Safety Precautions: Protective clothing, including eye shields, suitable gloves, and aprons should be worn when filling tanks or when there is a possibility of splashing or overspray. Tanks should be covered when not in use and should be operated with adequate ventilation for fume extraction. Operating instructions from the manufacturer of the system employed together with local workshop regulations shall be followed.

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