Aircraft NDT Services
In service aircraft Eddy Current requires a skilled technician with a nondestructive testing airman certificate or an A&P certificate to perform the required tasks. The technician should be qualified and certified to SNT-TC-1A or NAS-410. Some aircraft manufactures require the NDT inspectors to be qualified and certified to at least a Level II in accordance with the NAS-410 standard. This will usually unqualify most A&P mechanics and CRS’s from being able to perform the appropriate inspection. Even though a facility might be a certified repair station, some manufactures such as Cessna will require you to go through there qualification process in order to be able to utilize mandated standards and procedures in order to be able to work on their aircraft.
One of the biggest advantages of eddy current inspection on aircraft in the possibility of inspecting through paint. This allows for a very quick inspection versus FPI Fluorescent Penetrant Inspection which would require the removal of paint.
Service Parts and NDT Qualifications
Pre-service parts may require a different types of qualification and do not require a CRS. These types of qualification may include a NADCAP PRI accreditation. The benefit of such accreditation is the reduce necessity of annual auditing by facilities which honor the NADCAP audits as sufficient to comply with their facilities requirements. When a facility need s an ndt vendor in a rush it is possible to get an audit waiver by the facility requiring the inspection to provide its own audit therefore bypassing the requirement of NADCAP.
- In service aircraft ndt inspections include:
- Corrosion verification and detection of skins, wing lugs, bolts , fuselage, stringers and other metallic components.
- Torque tube pit and damage detection which may be verified by x-ray.
- AD Airworthiness directives issued by the FAA for NDI or NDT.
- SB Service bulletins issued by the manufacturers for Eddy Current NDT.
- Bead seat and bolt hole wheel inspections.
- Fastener hole inspections.
- Cracks propagating from rivet hole.
- Coating thickness verification or paint thickness determination.
- Conductivity measurement.
- APU (auxiliary power unit) fire damage verification.
- Bird Strike Inspection.
- Hardness verification.
- Alloy identification.
- Aircraft life extension inspection.
- Crack length verification.
- Rotor blades leading edge, trailing edge, route and tree inspection.
- Crack growth monitoring.