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newSchoolWorks.com › VoTechWorks › Transportation › Aviation Maintenance › FAA A&P Certification Exam Preparation › Lesson 2
TRN-AVIA22-08 · Lesson 2 · 45 clock hours · demo

Oral Test Preparation — ACS Knowledge and Judgment Areas

Objective. Learners will accurately answer examiner-style oral questions across all ACS knowledge areas for both the Airframe and Powerplant ratings, demonstrating the ability to locate supporting references when unable to answer from memory.

⚠ Pending professional review

This lesson, its worked examples and its practice questions has not yet been verified by a certified examiner or master technician in the trade or by a certification or approval body. It is a study draft and may contain errors. Do not use it as instructions for work on a job site or on live equipment. Always follow your instructor, your supervising professional, and current official references and regulations.

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What the Oral Test Is and Why It Matters

The FAA Airman Certification Standards (ACS) document governs both the written knowledge tests and the practical test for the Aviation Mechanic (A&P) certificate. The practical test has three parts: oral questioning, a written project, and hands-on skill tasks. The oral portion is conducted by a Designated Mechanic Examiner (DME) who follows the ACS task list to probe your knowledge across every subject area for the rating you are seeking — Airframe, Powerplant, or both. There is no fixed list of questions the DME must ask; instead, the ACS defines the knowledge elements, and the examiner exercises professional judgment about which questions reveal whether you genuinely understand the material.

Passing the oral test requires more than memorized answers. The DME is trained to follow up any answer with a deeper probe: "Why does that happen?" or "Where would you verify that?" Your goal is to demonstrate accurate knowledge and sound judgment — the two qualities the ACS title reflects.

How the ACS Organizes Knowledge Areas

The ACS is divided into task areas that match the content of the written tests and the practical test. For the Airframe rating, subject areas include aircraft structures, aircraft systems, flight controls, landing gear, hydraulics, pneumatics, fuel systems, electrical systems, instruments, and communication/navigation equipment. For the Powerplant rating, subject areas cover reciprocating engines, turbine engines, engine inspection, fuel and fuel metering systems, ignition and electrical systems, lubrication systems, propellers, and engine ground operation.

Regulatory knowledge cuts across both ratings. You must be able to discuss 14 CFR Part 65 (certification of mechanics), Part 43 (maintenance, preventive maintenance, rebuilding, and alteration), and the meaning and application of Airworthiness Directives (ADs). The DME may ask you to locate an AD, explain who is required to comply, and describe the consequence of non-compliance — so knowing the structure of these documents matters as much as knowing any single fact.

The "I Would Refer To" Technique

No examiner expects you to have every torque value or wear limit memorized. What they do expect is that you know exactly where to look and can explain why that source is authoritative. An acceptable answer to a specific maintenance value question sounds like this:

"I do not have that torque specification memorized, but I would refer to the aircraft manufacturer's maintenance manual for that specific assembly, because the manufacturer's data takes precedence over general handbook guidance for aircraft-specific values."

This response demonstrates judgment — which is the other half of what the ACS measures. Practice saying it naturally. The DME will penalize you for guessing a number you are not sure of; they will not penalize you for citing the correct reference.

Know the primary references for each subject area before your test date:

Structured Peer Oral-Questioning

During peer-questioning rotations, the learner in the applicant role should practice three habits: answer completely the first time, cite a source when giving a specific value, and pause briefly before answering rather than blurting out a guess. The learner in the questioner role should use the ACS task list — not invented questions — so that both learners are calibrated to actual exam content. Mark every question answered incorrectly or incompletely on a tracking sheet; those gaps become your personal re-study list.

Panel Oral Drills with the Instructor

The instructor-led panel drill replicates the real exam environment. Four learners participate at a time. The instructor plays the DME role, asks open-ended questions, and interrupts to probe depth. When the instructor models a reference-use response, pay attention to the exact phrasing: it should name the document, explain why that document applies, and confirm what information you would find there. Watch also for how the instructor handles a wrong answer — the DME will not coach you during the real exam, but observing the correction helps you understand where the knowledge boundary is.

Self-Assessment and Gap Closing

After each drill session, complete your self-assessment form using the 1–4 confidence scale for every ACS subject area. A score of 1 or 2 means you must open the relevant handbook or regulation before the next session. Identify exactly three topics — not vague subjects like "engines," but specific items like "turbine engine compressor stall causes" or "Part 43 Appendix A authorized major repairs." Focused, specific re-study in the time available before your exam is more effective than re-reading entire chapters.

Safety Awareness During Oral Preparation

Oral test content includes questions about hazardous materials handling, fuel system safety, and shop safety practices. Expect questions about proper lockout/tagout procedures before working on powered systems, the required PPE for tasks such as working with aviation fuels, hydraulic fluids, and battery systems, and the regulatory obligation to use the correct maintenance data. These are not trivia — they reflect real hazards that the ACS expects every certificated mechanic to control automatically.

Key terms9

Airman Certification Standards (ACS)The FAA document that defines the knowledge, risk management, and skill standards an applicant must meet during the aviation mechanic practical test, organized by task areas for each rating.
Designated Mechanic Examiner (DME)A highly experienced certificated aviation mechanic authorized by the FAA to conduct practical tests and issue aviation mechanic certificates on behalf of the FAA.
14 CFR Part 43The federal regulation governing maintenance, preventive maintenance, rebuilding, and alteration of aircraft; specifies who may perform and approve work and what records must be kept.
14 CFR Part 65The federal regulation establishing the requirements, privileges, and limitations for certification of aviation mechanics and other airmen.
Airworthiness Directive (AD)A mandatory regulatory document issued by the FAA requiring specific inspections, modifications, or operational limitations on aircraft or components when an unsafe condition is found to exist.
Reference-use responseAn acceptable oral test answer in which the applicant, rather than guessing an unknown value, names the specific authoritative document where that information would be found and explains why that source applies.
Task areaA defined section of the ACS covering a specific subject (for example, fuel systems or ignition systems) within which the examiner selects oral and practical test questions.
Return-to-serviceThe regulatory approval — documented by an authorized person's signature and maintenance record entry — that an aircraft or component is airworthy following maintenance, as required by 14 CFR Part 43.
Privileges and limitationsThe legally defined scope of work an A&P mechanic may perform and approve under Part 65; for example, a mechanic holding only the Airframe rating may not approve powerplant work.
In class: Participate in structured peer oral-questioning pairs using the FAA Aviation Mechanic ACS task lists as the question guide; each learner takes turns in the role of applicant and questioner for 30-minute rotations covering aircraft structures, systems, instruments, engines, fuel systems, ignition systems, and regulations, recording any question answered incorrectly or incompletely for follow-up. · Attend instructor-led panel oral drills in groups of four, with the instructor playing the role of a Designated Mechanic Examiner (DME); instructor asks open-ended ACS oral questions, interrupts to probe depth of understanding, and models the technique of answering 'I do not know from memory, but I would refer to [specific manual or regulation]' when appropriate, so learners practice acceptable reference-use responses. · Complete a written self-assessment after each oral drill session, rating personal confidence on each ACS subject area on a 1–4 scale and identifying three specific topics to re-study in the FAA-H-8083 series handbooks or applicable ADs before the next session.
Materials: FAA Aviation Mechanic — Airframe and Powerplant Airman Certification Standards (ACS) document, FAA-H-8083-31 (Airframe Handbook), FAA-H-8083-32 (Powerplant Handbook), FAA-H-8083-30 (General Handbook), 14 CFR Part 43 and Part 65, applicable manufacturer maintenance manuals available in the classroom, oral question card decks organized by ACS area, self-assessment rating forms.
Check: Instructor evaluates each learner during at least two panel oral drills using an ACS-aligned rubric scoring accuracy, depth, and appropriate reference use; learners must demonstrate acceptable responses (accurate or correctly redirected to source) on at least 80% of questions posed across all ACS subject areas. Pass mark: 80% acceptable response rate on instructor-scored oral drill rubric.

Practice check8

Answer each question, then check it. Nothing is recorded; this is your own practice.

FAA A&P Oral Test — General Knowledge / Regulations
1. During a panel oral drill, the DME asks you for the specific torque value for a fastener on a control surface hinge bracket. You do not recall the exact value. What is the most appropriate response?
FAA A&P Oral Test — Powerplant
2. Which FAA handbook is the primary reference for studying turbine engine fuel metering systems in preparation for the Powerplant oral test?
FAA A&P Oral Test — Regulations
3. An Airworthiness Directive (AD) is best described as:
FAA A&P Oral Test — Regulations / Part 65
4. Under 14 CFR Part 65, a mechanic who holds only the Airframe rating may:
FAA A&P Oral Test — Regulations / Part 43
5. Which of the following best describes the purpose of 14 CFR Part 43?
FAA A&P Oral Test — Study Skills / ACS Preparation
6. During a peer oral-questioning rotation, your partner gives an answer about fuel system inspection that is partially correct but omits a key safety step. As the questioner, what should you do?
FAA A&P Oral Test — Safety Practices
7. When preparing for oral questions about shop safety, a learner should be ready to explain lockout/tagout procedures primarily because:
FAA A&P Oral Test — ACS Preparation / Study Skills
8. On a self-assessment form after an oral drill, a learner rates personal confidence on 'turbine engine compressor stall causes' as a 2 out of 4. According to the lesson, the best next step is to:
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