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17 Cards in this Set
- Front
- Back
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list six possible causes of wiring degradation and briefly explain each
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vibration: - exacerbates and existing problem - causes the tie-wraps to damage insulation - chattering contacts and intermittent symptoms heat. dries up insulation too quickly leading to brittleness and subsequent cracking, high heat can damage the insulation and everything anyway maintenance -debris from works - low standard work in-scheduled activities done incorrectly chemical contamination hydraulic fluid, fluid from the galley or toilet, cleaning agents etc moisture moisture accelerates corrosion indirect damage damage from adjacent things |
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what is enhanced zonal analysis procedure (EZAP) and why is it developed
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EZAP is a process or inspection procedures that addresses a possible wiring installation discrepancies and degradations that may not be detected by inspection contained in existing maintenance programs, it is developed to aid reduction of ewis failures such as those caused by heat, chemical contamination, moisture etc
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the EZAP inspections applicable to EWIS are set in to three levels, what are those three levels
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detailed inspection (DET) general visual inspection (GVI) visual inspection (VI) |
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explain detailed inspections DET
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detailed inspection: an intensive examination of specific component, assembly or installation to detect defect or irregularities.
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describe the general visual inspection
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describe zonal inspection
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list some of the areas and possible problems with in the EWIS that has to be inspected when carrying out inspection
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list some of the areas that merit a special consideration when making wiring installation inspection
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what is unshielded acceptable wire damage, list
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if the damage is to the primary insulation/jacket and can be verified iaw AMM as any of the following - folds in insulation - small scratches on the insulation surface - roughened areas of the insulation caused by abrasion damage to the insulation that exposes the brown polyamide tape (provided that the polyamide tape |
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list some of the unshielded wire unacceptable damage
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if the damage can be verified iaw the AMM as any of the following a broke conductor damage to the brown polyamide damage that goes through the primary insulation damage that goes to the primary insulation |
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what are the shielded wire acceptable damage
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if the damage is only the primary insulation and can be verified by the AMM as any of the following - |
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what are the unshielded wire unacceptable damage
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what are the coaxial cable acceptable damage
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what are the coaxial cable unacceptable damage
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what are the acceptable and acceptable damages to splices
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`
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if there is a damage the repair/replacement scheme can differ, what will the repair/replacement scheme depend on
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what are the actions to be taken if a damaged coaxial cable is the cable found in systems such as low range radio altimeter and instrument landing system
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