Part-66 Module 6

It is delivered as a multiple-choice examination. The exact question count and time allowance are set by the training organisation or national competent authority running it, so check your examination invitation rather than assuming a figure. Practise answering quickly, because the module is broad and descriptive recall dominates.

The module covers ferrous materials, non-ferrous materials, composite and non-metallic materials, corrosion, fasteners, pipes and unions, springs/bearings/transmissions, control cables, and electrical cables and connectors. Treat them as nine roughly equal blocks and allot study time accordingly, though the electrical block is slightly larger in the profile used here.

You need to recognise common designations and understand what they tell you - the difference between mild steel and a high-strength alloy steel, or between a 2000-series and a 7000-series aluminium alloy. Rote memorisation of long specification lists is less useful than understanding properties, heat treatment and typical applications.

Two areas usually trip candidates: the corrosion chapter, where the forms of attack must be distinguished by appearance and location, and fasteners, where thread types, fits, locking methods and identification markings are easily confused. Cables and connectors also punish candidates who skim the wire-size and rating tables.

Start with ferrous and non-ferrous materials so the property vocabulary is in place, then composites and corrosion, which build on it. Hardware topics - fasteners, pipes, springs, bearings, cables - follow logically once you know what the parts are made of and how they fail.

Retake arrangements are set by the examining organisation or competent authority, not by the module itself, so ask them directly about waiting periods and the number of attempts permitted. Plan for a single attempt and build a revision margin rather than relying on a resit.

The pass mark is not published in the sources used for this page and varies with the examining body's procedures. Confirm it with your Part-147 organisation or competent authority before you sit the paper. Aim well above the stated threshold, since multiple-choice marking gives no credit for partially correct reasoning.

The materials and hardware content is essentially common to both licences; the difference lies in how deeply related systems material is pursued elsewhere in the syllabus. B2 candidates should still take the electrical cables and connectors section seriously, as it underpins later avionics modules.

No official study-hours figure is given in the sources here. As a working rule, plan several weeks of part-time study for a module this broad, and finish with timed practice papers so that recall of terms, markings and defect descriptions is automatic under exam conditions.