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The troubleshooting method: from fault report to dispatch

Fault reports, maintenance messages, fault isolation, structured troubleshooting, no fault found, MEL deferral and release to service, under EASA and FAA rules

By Aerospace Garage Desk · Practitioner · 45 minutes · 24 narrated pages

What you will be able to do

  • ✓ Turn a crew report and the maintenance computer's fault history into a precise problem statement and a fault isolation entry point.
  • ✓ Use the fault isolation manual, maintenance manual tests and wiring data correctly, knowing what each test proves and what it does not.
  • ✓ Apply a structured method: define, gather, split the system, test one variable at a time and verify the fix, ordering checks by probability and effort.
  • ✓ Recognise no fault found, rogue units, chronic aircraft and repeat defects, and use reliability rates and alert levels to decide where to look.
  • ✓ Dispatch correctly under the MEL and CDL: (M) and (O) procedures, placards, rectification intervals A to D, calendar-day counting and extensions.
  • ✓ Issue a release to service and hand over work safely, guarding against expectation bias and the Dirty Dozen, using the Spanair JK5022 findings.

Course content

Session 1 · Fault reporting: where troubleshooting starts

1.1

  1. From fault report to dispatch: the chain · free preview
  2. The technical log entry and the pilot report
  3. Flight deck alerts and maintenance messages
  4. Worked example: turning a log entry into a usable fault report
Session 2 · The fault isolation manual and maintenance manual tests

1.2

  1. The troubleshooting data set
  2. How a fault isolation task is built
  3. Maintenance manual tests: operational, functional and system
  4. Worked example: a fault isolation tree for a bleed fault message
Session 3 · Structured troubleshooting: define, split, test, verify

1.3

  1. Define the problem before touching anything
  2. Gather the facts and split the system
  3. Test one variable, then verify
  4. Worked example: choosing the order of checks
Session 4 · No fault found, rogue units and repeat defects

1.4

  1. No fault found: when the fault will not show itself
  2. Rogue units and chronic aircraft
  3. Repeat defects and the reliability programme
  4. Worked example: a repeat-defect decision with reliability data
Session 5 · Dispatch with inoperative items: MEL and CDL

1.5

  1. From master MEL to operator MEL
  2. Reading an MEL item: (M), (O) and placards
  3. Rectification intervals and deferred defect control
  4. Worked example: a category C deferral with calendar maths
Session 6 · Release to service, handover and human factors

1.6

  1. The certificate of release to service
  2. Human factors: expectation bias and the Dirty Dozen
  3. Shift handover: a decision in the log
  4. From the investigation file: Spanair Flight JK5022

Who this course is for

Upskill courses are for professional development and are not approved by any aviation authority. Learner Terms

Course content © Aerospace Garage Limited. All rights reserved.