CAA NZ Instrument Rating Air Law common mistakes
CAA NZ Instrument Rating Air Law · Understand the traps and how to avoid them.
Quoting a rule number or Part (e.g. 'Part 91 says...') without stating the actual requirement it imposes, so the answer names a regulation but never answers the question asked.
Candidates memorise a list of Part numbers and subpart headings during revision and treat recall of the citation as the answer, when exam questions are scenario-based and ask what the pilot must do, what minimum applies, or who holds responsibility.
What to do instead
For every rule you revise, write one sentence in your own words beginning 'The pilot must...' or 'The minimum is...'. Practise answering past-style scenarios by stating the operative requirement first, then adding the citation as supporting detail rather than as the substance of the answer.
Applying the wrong rule Part to the operation in the scenario, for example answering a question about an airline dual-pilot IFR sector using Part 91 general operating rules, or applying Part 135 to a private operation.
The same activity (IFR flight, carriage of passengers, instrument approaches) is governed differently under Parts 91, 121, 125 and 135, and candidates revise the Part they are most familiar with rather than identifying which Part the scenario's operator falls under.
What to do instead
Before answering any operating-rules question, identify three things: the operator's certificate type, whether the flight is commercial or private, and whether it is IFR or VFR. Build a one-page comparison table of Part 91 versus the commercial Parts covering minima, alternates, crew and duty, and revise from that table.
Treating airspace classes as a single memorised list of letters rather than knowing, for each class, the VMC visibility and cloud-clearance minima, whether an ATC clearance is required, and whether IFR and VFR are both permitted.
Candidates learn 'A is controlled, G is uncontrolled' as a slogan and never build the four-attribute matrix that questions actually test, so they confuse Class C with Class D or apply Class E VFR minima inside Class D.
What to do instead
Draw the matrix yourself: rows for Classes A to G, columns for ATC clearance required, VMC visibility, distance from cloud, and IFR/VFR permitted. Fill it from the rules and AIP, then answer ten scenario questions using only your matrix until you can reproduce it from memory.
Confusing the roles and responsibilities of ATS units and positions, such as attributing separation responsibility to a flight service or advisory unit, or assuming a control tower provides IFR separation in all cases.
The units are described across several documents (rules, AIP, MATS-style procedures) and candidates collapse them into a generic 'air traffic control' concept without distinguishing area control, approach control, tower, and flight information service.
What to do instead
Write a short description of each ATS unit covering what it provides, what separation it is responsible for, and what it does not provide. Then work through scenarios asking 'who is responsible here' and justify your answer by naming the unit and the service it provides.
Reading a METAR or TAF and answering from the first group seen, ignoring the issue time, validity period, trend groups, or the difference between prevailing conditions and temporary fluctuations.
Candidates learn the decode order (wind, visibility, cloud, temperature, pressure) but not the temporal structure of the report, so they miss that a TEMPO or BECMG group, or an expired TAF, changes what the flight will actually encounter.
What to do instead
Practise decoding full reports aloud, always stating issue time, validity, prevailing conditions, then any trend or temporary groups and what they mean for the planned arrival time. Do at least twenty decodes where you must decide whether the forecast is valid at your ETA.
Using the wrong alternate, holding, or take-off minima because the candidate applies a figure remembered from a different context rather than the standard that applies to the planned approach and weather.
Minima differ by approach type, by whether the airfield is controlled, and by the operator's rules, and candidates memorise one number (often a familiar approach minimum) and apply it universally.
What to do instead
Build a table organised by approach type and conditions, listing the applicable alternate requirement and the weather minima for planning. For each entry, note the source document, and practise questions where the approach type must first be identified from the scenario before the minimum is selected.
Confusing the validity, privileges, and renewal or recency requirements of the instrument rating with those of the underlying licence, such as assuming a current medical or a recent flight review alone restores instrument privileges.
The rating sits on top of a licence and each element (licence, rating, medical, recent experience) has its own currency rules, so candidates merge them into one 'am I current' check and answer with the wrong condition.
What to do instead
Draw a four-box diagram of licence, rating, medical, and recent instrument experience, and write under each box what is required, for how long, and what action restores it if lapsed. Answer currency questions by checking each box in turn before choosing an option.
Assuming an instrument rating permits flight in any weather, or forgetting that the rating does not remove the need for an appropriate medical certificate, type-specific privileges, or compliance with take-off and landing minima.
The rating is taught as 'the licence to fly in cloud', so candidates over-attribute authority to it and overlook the separate conditions attached to its exercise.
What to do instead
Write a list titled 'What the instrument rating does not authorise' and populate it with every separate condition you can find: medical validity, recent experience, approach minima, aerodrome requirements, and aircraft equipment. Revise from that list before attempting privileges questions.
Answering flight-rules questions from general knowledge of what 'should' happen rather than the specific rule, for example on cruising level selection, position reporting, or the transition between IFR and VFR.
Experienced pilots answer from habit and line experience, and habit sometimes reflects local practice rather than the written rule, particularly on semi-circular level rules, changeover points, and reporting points.
What to do instead
For each of these topics, locate the rule text and write the requirement as a short numbered list. Then answer practice scenarios and, for every wrong answer, trace back to the exact rule sentence you misapplied and rewrite it in your own words.
Skipping the AIP's structure and instead hunting for a specific aerodrome or procedure fact without knowing which volume, section, or chart it lives in, leading to answers based on an unrelated document.
The AIP is large and candidates revise its content rather than its organisation, so under exam conditions they cannot tell whether a piece of information belongs in the planning, en-route, or aerodrome volume, or on a chart versus in text.
What to do instead
Spend a session learning only the AIP's structure: volumes, sections, and what each contains. Then take twenty facts and, without looking, predict where each is published before verifying. This builds the retrieval skill the exam actually tests.