Aviation Industry Maintenance Techniques

Scheduled maintenance

Due to the number of components on a modern aircraft

Done using a fixed and organized plan

<p>Lifetime failure rates and patterns</p> Signup and view all the answers

<p>Failure rates, not reliability</p> Signup and view all the answers

<p>A definite wear out period</p> Signup and view all the answers

<p>To keep performance, reliability and availability within design limits at minimum cost; safety, availability and economic reasons.</p> Signup and view all the answers

<p>Deterioration with age (fatigue, wear, corrosion) and chance failures (tyre burst, excess structural loads).</p> Signup and view all the answers

<p>Scheduled maintenance is routine and plannable, while unscheduled maintenance arises from unexpected defects or failures.</p> Signup and view all the answers

<p>Unscheduled maintenance is performed to restore an item to serviceable condition by correcting a known malfunction or defect.</p> Signup and view all the answers

<p>Line/ramp maintenance, hangar/main base maintenance, and workshop maintenance.</p> Signup and view all the answers

<p>Replacement of faulty components that will have immediate or short term impact on aircraft operations.</p> Signup and view all the answers

<p>The objective of the inspections or tests is to determine whether or not the item can continue in service.</p> Signup and view all the answers

<p>If an item fails an OC check, only then is it removed for overhaul, repair, or replacement.</p> Signup and view all the answers

<p>OC checks must be performed within time limits (intervals) prescribed for each OC check.</p> Signup and view all the answers

<p>Examples of OC checks are tire tread and brake linings, scheduled borescope inspections of engines, engine oil analysis, and in-flight engine performance analysis using engine condition monitoring instruments (ECM).</p> Signup and view all the answers

<p>The amount of degradation can be measured and compared with established norms to determine how much life or serviceability remains.</p> Signup and view all the answers

<p>For an OC process to be applicable in a maintenance situation, either the OC check must be able to ensure serviceability with reasonable probability until the next OC check, or a satisfactory measurement can be made of the failure predicting data.</p> Signup and view all the answers

<p>Navigation equipment, communications equipment, lights, instruments</p> Signup and view all the answers

<p>Redundant systems, coffee makers, lavatories, passenger entertainment systems</p> Signup and view all the answers

<p>Hard Time, On Condition, Condition Monitoring, Maintenance Steering Group Approach (MSG-2)</p> Signup and view all the answers

<p>Hard Time Process, On Condition Process, Condition Monitoring Process</p> Signup and view all the answers

<p>Maintenance Steering Group Approach</p> Signup and view all the answers

<p>The three techniques are redundant systems, line replaceable units (LRUs), and minimum equipment lists (MELs).</p> Signup and view all the answers

<p>In a redundant system, if one unit fails, one or more backups are available to immediately take over the function.</p> Signup and view all the answers

<p>An LRU is a component or system designed so that the commonly failing parts can be quickly removed and replaced on the vehicle, allowing it to continue operation without significant interruption.</p> Signup and view all the answers

<p>A MEL allows a vehicle to be dispatched into service with certain items inoperative, provided the loss of function does not affect safety and operation.</p> Signup and view all the answers

<p>The MMEL (master minimum equipment list) is issued by the manufacturer and indicates all equipment that can be inoperative. The airline customizes this into their own MEL.</p> Signup and view all the answers

<p>The aircraft elevator hydraulic actuator is given as an example of a redundant system.</p> Signup and view all the answers