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Fuel Tank Safety (CDCCL) training
Phase 1 + 2 and Phase 2

Fuel Tank Safety (CDCCL) Training (Online)

A fuel tank explosion needs a flammable mixture of fuel and air and enough energy to ignite it. The design guards against it in two ways, ignition source prevention and flammability reduction, and maintenance has to keep those design features intact. These courses teach the two prevention concepts, Airworthiness Limitation Items and CDCCL, and how ordinary maintenance either protects those features or quietly removes them. The Phase 1 + 2 Initial course adds the Phase 1 awareness content.

fromEUR 39.99 Choose your course
Appendix IV to AMC5 145.A.30(e)The rule it answers
12 lessonsInitial course
3 h 23 minLesson reading time
75% to passMultiple-choice exam

Who needs this training

  • Part-145 personnel who are required to plan, perform, supervise, inspect and certify the maintenance of affected aircraft and fuel system components.
  • CAMO personnel involved in the management and review of the continuing airworthiness of those aircraft.
  • Affected aircraft are the large aeroplanes the appendix specifies: those certified after 1 January 1958 with a maximum type-certified passenger capacity of 30 or more, or a maximum certified payload capacity of 7500 lbs (3402 kg) of cargo or more, and those whose certification basis contains CS-25 amendment 1 or later.
Scope of this courseThe appendix assigns Phase 1 alone to the maintenance management structure, the compliance monitoring manager, the safety manager and the staff directly involved in monitoring compliance. A stand-alone Phase 1 awareness course is not sold here. Staff in the Phase 2 group are assigned Phase 1 as well as Phase 2.

The rule this training answers

Appendix IV to AMC5 145.A.30(e)

Appendix IV to AMC5 145.A.30(e) sets out Fuel Tank Safety training for Part-145 organisations in two phases. Phase 1 is awareness of the principal elements of the subject; it may take the form of a training bulletin or other self-study, the appendix requires the signature of the trainer to ensure the person has passed (the Part-M appendix: the signature of the reader), and it states no examination and no recurrence for Phase 1. Phase 2 is the detailed course for personnel who plan, perform, supervise, inspect and certify the maintenance of affected aircraft and fuel system components. The parallel appendix for CAMO staff is Appendix XII to AMC M.A.706(f).

For Phase 2 the appendix gives real figures: an examination in the form of multiple-choice questions with a 75% pass mark, and 8 hours as an acceptable duration. Separately, the organisation should ensure that staff in the Phase 2 group receive recurrent training in each 2-year period.

Initial or Continuation

Initial - Phase 1 + 2

First-time training

Phase 1 awareness and the full Phase 2 syllabus in one course. Take this if you have not had fuel tank safety training before.

  • 12 lessons
  • 3 h 23 min of lessons
  • 35 knowledge checks
  • 16 exam questions
Appendix IV to AMC5 145.A.30(e)
EUR 39.99

Initial - Phase 2

Phase 2 only

The full Phase 2 (Detailed) syllabus, taught in depth. Take this if you have completed Phase 1 but not Phase 2.

  • 10 lessons
  • 2 h 43 min of lessons
  • 29 knowledge checks
  • 16 exam questions
Appendix IV to AMC5 145.A.30(e)
EUR 39.99

Continuation

Refresher

The shorter refresher for staff already trained. It recaps the essentials and focuses on current emphasis and lessons learned.

  • 7 lessons
  • 1 h 54 min of lessons
  • 20 knowledge checks
  • 14 exam questions
Appendix IV to AMC5 145.A.30(e)
EUR 39.99

Lesson times are reading times. They are not a regulatory training duration.

What you will learn

  • Why a fuel tank can ignite, and the two concepts that prevent it: ignition source prevention and flammability reduction.
  • Airworthiness Limitation Items (ALI) and Critical Design Configuration Control Limitations (CDCCL): what they are, why they are mandatory, and what they protect.
  • Protecting CDCCL in maintenance: wiring separation, bonding and grounding, correct installation and part substitution control.
  • Flammability reduction and inerting systems, and the precautions for working on them.
  • Configuration control, recording, and the accidents behind the rules.
  • Phase 1 + 2 Initial only: who needs which phase and when, typical fuel tank safety defects, and how limitations and CDCCL appear in maintenance documents.

Syllabus, lesson by lesson

Fuel Tank Safety Phase 1 + 2 (CDCCL) - Initial12 lessons, 3 h 23 min
  1. 1 Phase 1 and Phase 2: who needs which, when, and what this course coversAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 18 min
  2. 2 Why fuel tank safety became a discipline - background and regulatory basisAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 15 min
  3. 3 Lessons from history - three centre-tank explosionsAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 15 min
  4. 4 The ignition risk and the fuel-system safety conceptAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 17 min
  5. 5 Airworthiness Limitation Items (ALI) - what they are and why they are mandatoryA.2 Airworthiness limitations 16 min
  6. 6 Critical Design Configuration Control Limitations (CDCCL) - what they are and why they cannot be changedA.2 Airworthiness limitations 17 min
  7. 7 Protecting CDCCL in maintenance I - wiring separation, bonding and groundingAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 18 min
  8. 8 Protecting CDCCL in maintenance II - correct installation, part substitution control and workmanshipAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 18 min
  9. 9 Flammability reduction, inerting and fuel-system interfacesAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 16 min
  10. 10 Configuration control, no unapproved changes, and documentationA.2 Airworthiness limitations 16 min
  11. 11 Typical fuel tank safety defects, and the documents that control the fixAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 20 min
  12. 12 Putting it together - Phase 1 and Phase 2 in practiceAppendix IV to AMC5 145.A.30(e), para F - Approval of training 17 min
Fuel Tank Safety Phase 2 (CDCCL) - Initial10 lessons, 2 h 43 min
  1. 1 Why fuel tank safety became a discipline - background and regulatory basisAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 15 min
  2. 2 Lessons from history - three centre-tank explosionsAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 15 min
  3. 3 The ignition risk and the fuel-system safety conceptAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 17 min
  4. 4 Airworthiness Limitation Items (ALI) - what they are and why they are mandatoryA.2 Airworthiness limitations 16 min
  5. 5 Critical Design Configuration Control Limitations (CDCCL) - what they are and why they cannot be changedA.2 Airworthiness limitations 17 min
  6. 6 Protecting CDCCL in maintenance I - wiring separation, bonding and groundingAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 18 min
  7. 7 Protecting CDCCL in maintenance II - correct installation, part substitution control and workmanshipAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 18 min
  8. 8 Flammability reduction, inerting and fuel-system interfacesAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 16 min
  9. 9 Configuration control, no unapproved changes, and documentationA.2 Airworthiness limitations 16 min
  10. 10 Putting it together - responsibilities, judgement and the assessmentAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 15 min
Fuel Tank Safety Phase 2 (CDCCL) - Continuation7 lessons, 1 h 54 min
  1. 1 Why Fuel Tank Safety exists - the ignition-prevention conceptAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 15 min
  2. 2 CDCCL and Airworthiness Limitation Items - the heart of FTSA.2 Airworthiness limitations 18 min
  3. 3 Protecting CDCCL in maintenance - separation, bonding, and installationAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 18 min
  4. 4 Flammability reduction, inerting and fuel-system interfacesAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 16 min
  5. 5 Configuration control, records and no unapproved changes145.A.45(b) 17 min
  6. 6 Lessons from history - three centre-tank explosionsAppendix IV to AMC5 145.A.30(e) and AMC2 145.B.200(a)(3) - Fuel Tank Safety Training 15 min
  7. 7 What has changed, lessons learned, and the discipline to carry homeChapter 3.9 of the maintenance organisation exposition (MOE) 15 min

From the course introduction

Welcome to Fuel Tank Safety (FTS) Phase 1 and Phase 2 - a first course that takes you through both phases of fuel tank safety training together: Phase 1 (Awareness) and Phase 2 (Detailed training). You do not need to have done any fuel tank safety training before. We start with who needs which phase and when, build up from first principles - why a fuel tank can explode at all - and finish at the point where you can recognise, protect and correctly restore the design features that keep a fuel tank safe.

The course is written for the people the training appendix places in its Phase 1 + Phase 2 group: "Personnel of the Part-145 approved maintenance organisation who are required to plan, perform, supervise, inspect and certify the maintenance of the aircraft and fuel system components specified in paragraph A)" - and, in the Part-M (CAMO) appendix, "Personnel of the CAMO involved in the management and review of the continuing airworthiness of aircraft specified in paragraph A)". The first lesson explains which aeroplanes paragraph A covers, and who needs Phase 1 only.

Your certificate

Pass the final exam at 75% and download your certificate straight away. Your organisation can check it at any time at Verify a certificate.

The appendix asks for recurrent training in each 2-year period; it may be combined with the Phase 2 training. It states no recurrence for Phase 1. Your certificate shows a "Refresh due by" date 24 months after issue. The Continuation course is our recurrent-training course; the appendix leaves the recurrent syllabus to your organisation's training programme (MOE Chapter 3.9), which decides whether this course meets it.

This is independent training mapped to the applicable AMC and GM. Part66Online is not a Part-147 approved organisation, and no Part-147 approval is needed for this training. Final acceptance toward your training obligations rests with your employing organisation and its competent authority.

What the certificate records

  • Your name
  • The course and the references it is mapped to
  • That you passed the assessment
  • The issue date and a “Refresh due by” date
  • A unique ID that can be verified online

Fuel Tank Safety (CDCCL) training — frequently asked questions

What is the difference between Phase 1 and Phase 2?
Phase 1 is awareness of the principal elements of the subject. The appendix assigns it alone to the maintenance management structure, the compliance monitoring manager, the safety manager and the staff directly involved in monitoring compliance. Phase 2 is the detailed course for personnel who plan, perform, supervise, inspect and certify maintenance on affected aircraft and fuel system components; they are assigned Phase 1 as well. Phase 2 ends in a multiple-choice examination with a 75% pass mark. The Phase 1 + 2 Initial course covers both phases; the Phase 2 Initial course covers Phase 2 for staff who have already completed Phase 1.
What are CDCCL?
Critical Design Configuration Control Limitations are airworthiness limitations that control critical design configurations of the fuel tank system - wiring separation is a typical example. An airworthiness limitation is a boundary beyond which an aircraft or a component must not be operated unless the instructions associated with it are complied with. The course explains what configuration control means and how maintenance protects it.
How long does the course take?
Each lesson’s reading time is shown in the syllabus on this page, and the knowledge checks and final exam come on top. The appendix gives 8 hours as an acceptable duration for Phase 2 training. Final acceptance of this training toward your training obligations rests with your employing Part-145/CAMO organisation and its competent authority.
Should I take the Initial or the Continuation course?
Take Initial - Phase 1 + 2 if you have not completed fuel tank safety training before. Take Initial - Phase 2 if you have completed Phase 1 but not Phase 2. Take Continuation if you have completed Phase 2 and your recurrent training is due.
Need all three mandatory subjects?

Human Factors, Fuel Tank Safety and EWIS together cost EUR 99.99 as a bundle, Initial or Continuation, against EUR 119.97 bought one by one.

See the bundles

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