DEFINITION OF INSPECTION METHODS
INSPECTION METHOD DESCRIPTION FOR BOEING DTR SYSTEM TYPICAL APPLICATIONa
LEVEL PERSONNEL
Walk-Around Observations from the ground to detect obvious discrepancies such as fuel leaks. (See Category 2. Structure) Pre-Flight or Daily Flight or Ground Crew
General Visual Inspection (GVI) A visual examination of an interior or exterior area, installation or assembly to detect obvious damage, failure, or irregularity. The inspection is made from within touching distance unless otherwise specified. A mirror may be needed for visual access to all surfaces in the inspection area. The inspection is made under normal lighting conditions such as daylight, hangar lighting, flashlight or droplight and may require removal or opening of access panels or doors. Stands, ladders or platforms may be required to gain proximity to the inspection area. Surface cleaning may be required. Intermediate or Major Check (C or D) Structural Inspection Overhaul Inspectors
Detailed (DET) An intensive visual examination of a specific item, installation or assembly to detect damage, failure, or irregularity. Available lighting is usually supplemented with direct lighting at an intensity deemed appropriate by the inspector. Inspection aids such as mirrors, magnifying lenses, etc. may be necessary. Surface cleaning and access procedures may be required.
Special An intensive examination of a specific item, installation or assembly to detect damage, failure, or irregularity. The examination is likely to make extensive use of specialized inspection techniques and/or equipment. NDI methods are used to examine all subsurface damage and most small cracks. Intricate cleaning and substantial access and/or disassembly procedures may be required. NDI methods include Ultrasonic (UT), Eddy Current (LFEC, HFEC), Magnetic Particle (MT), Dye Penetrant (PT) And X-Ray. Multiple Intermediate or Major Checks (2C, 4C or D) NDT Inspectors
a. Reference only, any inspection method can be used with any defined repeat interval.
5.0 DTR SYSTEM APPLICATION D6-82669 Original
5.2 Program Implementation and Revision Instructions
The original SSID and subsequent revisions are FAA approved and controlled by AD action. Revised and new SSID requirements do not become mandatory, however, until after release of or revision to the applicable AD. After publication of the new or revised SSID, the FAA processes a Notice of Proposed Rule Making (NPRM) after which a new, revised, or new (superseding) AD is issued. The AD will specify a certain period of time, from the effective date, for implementing any changes in requirements resulting from the new or revised SSID. Related maintenance program revisions and implementation schedule approval should be obtained from the applicable airworthiness authority.
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