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Module 7 — Maintenance Practices

7.18(e) — Troubleshooting Techniques

Practice questions test what you know. This note teaches what you don’t.

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Troubleshooting is the systematic process of identifying and isolating the cause of a malfunction or discrepancy. Effective troubleshooting saves time, prevents unnecessary component removals (the "shotgun" approach, which is what drives the industry's No Fault Found — NFF — rate), and ensures the root cause is actually fixed rather than just the symptom.

5 sections 3 worked examples 1 key formula 2 tables 2 tips 3 warnings

15 exam-style questions in our bank test this topic. This note teaches the theory behind every one of them.

What you will learn

  1. Troubleshooting and Fault-Finding Methodologies
  2. Symptom-to-Cause Reasoning, Fault Trees and Common-Cause Analysis
  3. Troubleshooting Aids
  4. Intermittent and Non-Repeatable Faults
  5. Verifying the Repair and Closing the Job
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