28035 Interpret and Use Non-Complex Aircraft Direct Current (DC) Electrical Load Circuit

Explanatory notes

1All tasks are to be carried out in accordance with enterprise procedures, the enterprise being the organisation carrying out the work. Enterprise procedures referred to in this unit standard are the applicable procedures found in the following: enterprise exposition; manufacturer publications; Government and local body legislation; airworthiness authority requirements.

2This unit standard has been developed for learning and assessment off-job.

Outcomes and evidence requirements

Outcome 1

Interpret non-complex aircraft DC circuit diagrams.

Rangecircuit diagrams – series, parallel, and series-parallel connections; using switches, lamps, ammeters, voltmeters, fuses, resistors, batteries, relays, motors generators, capacitors, inductors.

Evidence requirements

1.1Applications of the principles of DC load circuit components are described in terms of aircraft electrical systems and circuit diagrams.

1.2Standard symbols are used.

1.3Operation of load circuits is explained with reference to current paths.

Outcome 2

Use aircraft electrical component location diagrams.

Evidence requirements

2.1Aircraft electrical components are located using the manufacturers location diagrams.

Outcome 3

Carry out fault analysis of non-complex load circuit faults.

Rangeexamples of faults – open and short circuits, high resistance, low resistance, low insulation resistance.

Evidence requirements

3.1Fault area is located using aircraft electrical circuit diagrams.

3.2Fault area is isolated logically based on symptoms.

3.3Test points are selected logically within bracketed fault area.

Outcome 4

Use basic electronic test equipment to check voltage and resistance readings in-circuit.

Rangevoltmeter, ohmmeter, ammeter, insulation resistance tester, bonding tester.

Evidence requirements

4.1Electronic test equipment is operated to obtain accurate results in accordance with enterprise procedures.

4.2Equipment is operated in such a way that damage to test equipment and aircraft circuits cannot occur.

Outcome 5

Use electrical safety and isolation.

Rangeremoval of fuses and tripping of circuit breakers, placarding of fuses and circuit breakers, batteries disconnected, ground power removed.

Evidence requirements

5.1Safe circuit configuration is used for power-on checks in accordance with enterprise procedures.

5.2Safe circuit configuration is used for resistance checks, and working on dangerous circuits in accordance with enterprise procedures.

5.3Correct procedure is used for ensuring dangers are made evident to all tradesmen working on the aircraft.

Outcome 6

Demonstrate correct techniques for repair of wiring faults and post-repair testing.

Rangeaircraft wiring, connectors, splices and terminals, soldering, testing.

Evidence requirements

6.1Correct procedures for wiring repair and fabrication is demonstrated in accordance with enterprise procedures.

6.2Knowledge of tests and when to be done is demonstrated in accordance with enterprise procedures.

6.3Continuity and insulation resistance tests are conducted in accordance with enterprise procedures.

Status information and last date for assessment for superseded versions

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Please note

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Providers and Industry Training Organisations, which have been granted consent and which are assessing against unit standards must engage with the moderation system that applies to those standards.

Requirements for consent to assess and an outline of the moderation system that applies to this standard are outlined in the Consent and Moderation Requirements (CMR). The CMR also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements.

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