PNG CASA AME Subject 20 Air Law common mistakes
PNG CASA AME Subject 20 Air Law · Understand the traps and how to avoid them.
Treating the PNG Civil Aviation Act as if it were the rulebook, quoting Act sections to answer questions about engineer privileges, maintenance programme content, or airspace classification.
Candidates study the Act first because it is short and authoritative-sounding, and they never build a clear mental map of the hierarchy: Act (enabling powers and offences) → PNG Civil Aviation Rules (the operative requirements) → advisory circulars (acceptable means of compliance, not law). They then answer with the wrong instrument.
What to do instead
Before studying content, draw a one-page hierarchy diagram and label each layer with what it can and cannot do. For every practice question, write down which instrument the answer must come from. Drill the distinction explicitly: an advisory circular never creates a requirement, and an Act section rarely states a technical standard. Re-sort a shuffled set of 30 requirements into Act / Rule / AC and check your accuracy before moving on.
Assuming that because PNG is an ICAO member state, ICAO Annexes apply directly to an engineer and can be cited as the legal basis for a maintenance or licensing decision.
Candidates learn Annex content in training and conflate international standards with national law. They do not realise that Annexes become binding only through the state's own rules and that PNG files differences from Annex provisions, so a purely Annex-based answer can be wrong in PNG.
What to do instead
Learn the mechanism, not just the content: Annex → state implements via national rules → CASA PNG enforces. Practise questions phrased as 'what is the legal basis in PNG for X' and answer with the PNG rule, using the Annex only as background. Note the concept of filed differences and be able to say what it means for a standard that PNG has not adopted in full.
Confusing the licence category, the type rating, and the authorisation to certify: assuming an AME licence alone permits certification of any aircraft, or that a type rating covers all variants and all work within a maintenance programme.
Licensing questions are usually studied as a list of requirements rather than as a system of privileges and limitations. Candidates memorise 'holds a licence' and skip the conditions attached to exercising it - type ratings, category and group ratings, recent experience, and the specific certification privileges granted.
What to do instead
Build a privileges-and-limitations table for each licence category: what may be certified, on what aircraft, under whose quality system, and what conditions (current type rating, recency, supervision, approved data) must be met. Then answer questions by checking each condition against the scenario rather than pattern-matching the word 'licence'.
Treating the maintenance programme as a fixed document copied from the manufacturer's schedule, and missing that in PNG the operator's programme must be approved and that any deviation, escalation, or task substitution needs an approval route.
Candidates learn the content of a typical programme but not its governance. They do not distinguish between the approved programme, the operator's procedures for controlling it, and the engineer's role in recording and certifying work against it, so questions about changes, extensions, and unapproved tasks are answered by intuition.
What to do instead
Study the programme as a controlled document with a lifecycle: development, approval, issue, revision, and deviation control. For each scenario ask three questions - is this task in the approved programme, is the data approved, and who is authorised to approve the change? Learn which changes are major versus minor and who signs off each.
Answering continuing airworthiness questions only in terms of 'the maintenance was done', ignoring the airworthiness state of the aircraft: certificate of airworthiness validity, mandatory continuing airworthiness information compliance, mass and balance, and configuration control.
Engineers are trained to think in tasks and paperwork, so they focus on the work performed. Continuing airworthiness questions are written around the aircraft's status and the operator's responsibility, which is a different frame of reference and is under-studied.
What to do instead
For each aircraft in a scenario, list its airworthiness prerequisites before discussing maintenance: valid C of A, compliance with mandatory information, approved programme, mass and balance within limits, and correct configuration. Practise writing this checklist from memory and applying it to short scenarios until it becomes the first thing you do, not the last.
Mixing up airspace classes and the associated services and clearances - for example assuming a class D control zone provides the same separation as class C, or that an ATC clearance automatically authorises entry into controlled airspace in all conditions.
Airspace classification is taught as a table that candidates memorise once, and the differences between classes blur under exam pressure. Rules of the air questions also test the interaction between clearance, position reporting, and communications failure, which the table alone does not cover.
What to do instead
Rebuild the airspace table from first principles for each class: who is separated from whom, what services are provided, what clearance and communication is required, and what happens on radio failure. Then answer scenario questions by naming the class, stating its service level, and only then applying the rule. Test yourself by covering the table and reconstructing it.
Treating occurrence reporting as optional or as something done only when an accident occurs, and confusing the reporting threshold, the recipient, and the timescale.
Candidates conflate 'accident', 'serious incident', and 'occurrence' and assume reporting is a courtesy. They also carry over habits from other states' schemes, which have different thresholds and forms, and so give a plausible but wrong recipient or deadline.
What to do instead
Learn the PNG definitions and the reporting chain as a decision tree: classify the event, identify who must report, to whom, within what time, and what protection applies to the reporter. Practise classifying ten short event descriptions into accident / serious incident / reportable occurrence / not reportable, and justify each classification with the definition.
Answering dangerous goods questions from general chemistry or from passenger-facing cabin rules, missing the shipper/operator/engineer responsibilities and the acceptance check that an engineer may be part of.
Dangerous goods is often studied as a list of forbidden items for passengers. The exam tests the consignment and acceptance process - classification, packing, marking, labelling, documentation, and the operator's acceptance obligation - which requires a process view rather than a list.
What to do instead
Study dangerous goods as a chain of responsibility: shipper classifies and packs, operator accepts and checks, and the engineer may be the person handling or inspecting. Learn the acceptance check items as a sequence and be able to state who is responsible for each. Use the technical instructions' structure as your map rather than memorising item lists.
Assuming enforcement only concerns the licensed individual, and that a finding against an organisation has no bearing on the engineer's own licence or on the operator's certificate.
Candidates picture enforcement as a penalty applied to whoever made the error. In practice, offences, certificate action, and licence action are separate tracks, and questions test which track applies, what the standard of proof is, and what defences or review routes exist.
What to do instead
Map the enforcement tracks explicitly: offence and penalty, certificate suspension or variation, licence action, and the review or appeal route for each. For a scenario, identify the actor (individual, organisation, or both), the instrument breached, and the available action. Learn the difference between a finding, a violation, and an offence in PNG usage.
Treating safety management as a set of slogans - 'just culture', 'safety culture', 'SMS' - and being unable to say what a hazard, a risk, a safety assurance process, or a safety performance indicator actually is in a maintenance organisation.
SMS material is written in management language that candidates skim, so they learn vocabulary without the operational meaning. Exam questions then test the distinction between hazard and risk, or between assurance and promotion, and the candidate answers with a slogan.
What to do instead
Rewrite each SMS component in maintenance terms with a concrete example: a hazard is an unapproved tooling practice, the risk is its likelihood and consequence, assurance is the audit that detects it, and promotion is the training that prevents recurrence. Practise converting five real maintenance scenarios into that structure, and be able to name which component each activity belongs to.