Downloaded from https://www.everyspec.com ADS-43A-HDBK * U. Electrical Inspection T. Visual 2.2.4.1 Justification for Inspection Methods Critical Characteristics Destructive and /or Non-Destructive inspection methods may be required for some parts. Normally, destructive inspections are done on coupons or part segments which are cast or forged from the same material heat lot. These inspections are typically accomplished by the casting or forging vendor who then certifies that lot. In some cases, 100% ultrasonic or radiographic tests are required and records kept for future reference.
Non-Destructive inspection methods are often 100% for flight safety critical parts and will be accomplished as specified on the applicable drawings. Each required inspection is to verify that some critical characteristic has been met, i.e., no defects in material, processing, manufacturing, or deviations from dimensional requirements. Electrical Inspection. For controls and associated components to be approved for operation on the engine, they must pass the required specifications for their ability to:
monitor engine functions, process the functions, control the engine, process the prescribed signals to the cockpit, and store signals for future use; under severe conditions of altitude, humidity, temperature, electromagnetic compatibility (EMC), shock, and vibration as per specifications listed in the index. The data received and transmitted by the controls and components will be required to monitor engine and environmental functions and combine this data to control the engine and present information to the cockpit for reliable and safe control of the aircraft at all times.
The control components must be compatible with received and transmitted electromagnetic energy so there will be no interference with control and monitoring functions of the engine. 2.2.5 Typical Critical Characteristics (Baseline) The following are typical critical characteristics for engine components which must be considered baseline. Other critical characteristics may be added by USAATCOM engineering or, as prompted by field service experience. 2.2.5.1 Gears Nital Etch Inspection, if required on drawing. Inspection for white layer, when called out on drawing. Magnetic Particle Inspection. Master Tooling for Bevel Gears. Balancing, if called out on Drawing.
Bearing and Centering Journals - Runout, Diameter, and Concentricity. 1 9