4.5 Regulations, Forms, Records, and Publications

Regulations, Forms, Records, and Publications

Regulations, records, forms, and publications turn mechanical work into legal maintenance. The General ACS includes mechanic certificate privileges and limitations, recent experience, maintenance record entries, inspection record entries, FAA forms, Part 1 definitions, major and minor repair or alteration decisions, the 14 CFR framework, agency publications, airworthiness directives, type certificate data sheets, advisory circulars, approved data, acceptable data, manufacturer publications, airworthiness limitations, warnings, cautions, notes, inoperative equipment, placards, effectivity codes, and address change procedures.

A mechanic certificate with airframe, powerplant, or both ratings authorizes work only within privileges and limitations. Part 65 concepts include certification and recent experience. Part 43 concepts include maintenance, preventive maintenance, rebuilding, alteration, record entries, performance rules, and approval for return to service. Part 91 often appears because operators have inspection and maintenance responsibilities.

A basic return-to-service maintenance entry under Part 43 principles includes a description of work performed or reference to data acceptable to the Administrator, the date of completion, the name of the person performing the work if someone else approves it, and the signature, certificate number, and kind of certificate held by the approving person. Inspection entries have their own requirements and must state the inspection type and result.

Major versus minor classification is a frequent study topic. A major repair or major alteration is one that meets regulatory criteria such as appreciably affecting weight, balance, structural strength, performance, powerplant operation, flight characteristics, or other qualities affecting airworthiness, or that is not done according to accepted practices or cannot be done by elementary operations. Major work generally requires approved data. Minor work may use acceptable data when appropriate.

FAA Form 337 is associated with major repairs and major alterations. You should know its purpose and be able to examine it for completeness and accuracy. Other forms listed in the ACS include malfunction or defect reporting and forms tied to conformity or airworthiness documentation. Do not reduce forms study to memorizing numbers. Know why the form exists and what decision it supports.

Publications must be current and applicable. A type certificate data sheet gives certification data and limitations for specific models. Airworthiness directives are mandatory and may have recurring inspections or Alternative Methods of Compliance when approved. Manufacturer maintenance manuals, illustrated parts catalogs, service bulletins, maintenance alerts, master minimum equipment lists, and airworthiness limitations can all matter, but their regulatory effect depends on the context.

Effectivity is a documentation risk. A part or procedure may be usable only on certain serial numbers or configurations. Inoperative equipment can require records, placards, minimum equipment list procedures, or other regulatory treatment. Warnings, cautions, and notes in manuals are not filler; they identify hazards, equipment damage risks, and important procedural information.

Use this documentation checklist:

1. Identify the applicable regulation, certificate privilege, and rating.
2. Determine whether the work is maintenance, preventive maintenance, repair, or alteration.
3. Decide whether the repair or alteration is major or minor.
4. Select current and applicable data.
5. Complete the correct record or form with required signatures and certificate information.
6. Verify AD, TCDS, STC, equipment list, placard, and effectivity concerns before return to service.