Electrical Circuits and Aviation Maintenance

These flashcards cover key concepts about electrical circuits, aviation maintenance protocols, and fundamental physical sciences relevant for the exam.

Resistance

The opposition to the flow of electrons in an electrical circuit.

Ohm

The basic unit of electrical resistance.

Factors affecting resistance

Material, cross-sectional area, length, and temperature of the conductor.

Color bands

Used to determine the resistance of a composition resistor.

Resistance formula

Resistance = Voltage divided by Current (R = E / I).

Center of gravity

The point at which an object's weight is evenly distributed; for most airplanes, it is ahead of the center of lift.

Moment of an item

Calculated by multiplying the weight of the item in pounds by its distance from the datum in inches.

Arm of an item

Found in the Type Certificate Data Sheets or the aircraft equipment list.

Best rope for tie down

Nylon or polypropylene.

Securing knot for aircraft

Bowline.

Area of a circle

A = π/4 × D² or A = π × R².

Area of a rectangle

A = L × W.

Area of a triangle

A = (B × H) ÷ 2.

100-hour inspection authority

A certificated Aviation Mechanic with Airframe and Powerplant rating.

Annual inspection authority

A certificated A&P mechanic holding an Inspection Authorization.

Supervision of unlicensed persons

A certificated A&P mechanic must personally perform the 100-hour inspection.

Rebuilding an aircraft engine

Only the manufacturer or an approved facility can issue a zero-time maintenance record.

FAR maintenance records requirement

14 CFR §91.417 mandates keeping records of maintenance and inspections.

Mandatory instructions in Federal Regulations

They are mandatory.

Return to service after major repair

Authorized by an aircraft mechanic holding an Inspection Authorization.

Preventive maintenance authority

Holders of a pilot certificate for aircraft not flown under Part 121, 127, 129, or 135.

Experience for Aviation Mechanic certification

30 months, or a completion certificate from a maintenance technician school.

Tests for mechanic knowledge

Written knowledge tests demonstrate proper knowledge for applicants.

Tests for minimum skill requirements

Oral and practical tests for applicant skills.

Certificate for 100-hour inspection

An Aviation Mechanic certificate with both Airframe and Powerplant ratings.

Certificate for annual inspection

An Aviation Mechanic certificate with an Inspection Authorization.

Notify FAA after address change

Within 30 days after a permanent change of address.

Replacing tachometer cable

Permissible for a mechanic with an Airframe and Powerplant rating.

Zeroing pointers on fuel pressure gauge

Not allowed for a certificated Aviation Mechanic.

Experience for exercising certificate privileges

At least 6 months within a 24-month period.

Determining minor repair or alteration

If it is not listed as major in 14 CFR Part 43, Appendix A.

Transferring maintenance records upon aircraft sale

Must transfer records that include current Airworthiness Directives.

Type Certificate Data Sheet (TCDS)

Formal description listing limitations for aircraft, engines, or propellers.

Aircraft Specifications

Documents similar to TCDS issued under Air Commerce Regulations.

Document for fuel type specifications

The TCDS for the airplane.

Control surface movement document

The TCDS for that specific airplane.

Need for referring to TCDS during inspection

Specifications are required for airworthy status.

Publication for nondestructive testing methods

AC 43-3.

Purpose of an Airworthiness Directive (AD)

To inform aircraft owners/operators of conditions affecting airworthiness.

First step in AD issuance

Publication of a notice of proposed rulemaking (NPRM).

Dissemination of AD information

Printed and distributed by first class mail.

Urgent AD nature

May be adopted without an NPRM.

Emergency AD communication methods

Sent by first-class mail, telegram, or electronically.

Location for AD list

FAA's website under the Dynamic Regulatory System (DRS).

Subscribing information for ADs

Provided by contacting FAA, Manufacturing Standards Section.

Significance of AD identification number

Indicates the year, biweekly period, sequence number, and revision.

Mandatory compliance with AC information

No, it is advisory.

Association of AC 43.13-1B with 14 CFR

Associated with 14 CFR Part 43.

Use of AC 43.13-1B information

Not all information is approved data.

Purpose of General Aviation Airworthiness Alerts

To inform maintenance personnel of reported problems.

Deviating from AD compliance

Not allowed without an approved alternative method.

Finding dimensional tolerances for wrist pin

In the overhaul manual for the engine.

Finding approved repair for damaged wing spar

In the structural repair manual.

Finding part number for landing light bulb

In the illustrated parts catalog.

Troubleshooting electrical flap system

In the aircraft wiring diagram manual.

Finding empty weight of an airplane

In the aircraft weight and balance records.

Purpose of minimum equipment list (MEL)

Permits operation with certain inoperative equipment temporarily.

Master minimum equipment list (MMEL)

A document listing minimum operative equipment required for safe flight.

FAA databases for aviation documents

Located on the FAA’s Dynamic Regulatory System (DRS) website.

Manufacturer specifications for compliance requirements

In the Maintenance Manual and Instructions for Continued Airworthiness.

Maintenance and inspection interval specifications

Included in the Maintenance Manual.

Finding FAA-approved maintenance data

In the aircraft manufacturer’s maintenance manual.

Differences between approved data and acceptable data

Approved data is for major alterations; acceptable data is for minor.

Matter definition

Anything that occupies space and has weight.

Basic physical states of matter

Solid, liquid, and gas.

Energy definition

The capacity for doing work.