Project Planning, Regulatory Framework, and Safety Baseline

Why Planning Comes First

In aviation maintenance, work done without a complete plan is a liability—not just to the technician, but to every person who will ever board that aircraft. The FAA requires that maintenance be performed in accordance with approved data, properly documented, and returned to service only when all regulatory requirements are met. The capstone project begins, therefore, not with a wrench but with paperwork. A thorough work-order package created before any hands-on work is the foundation that keeps the project legal, safe, and traceable.

Regulatory Framework: 14 CFR Parts 43 and 65

14 CFR Part 43 governs the performance of maintenance, preventive maintenance, rebuilding, and alteration of civil aircraft. It defines who may perform work, what constitutes major versus minor repairs and alterations (Appendix A), how work must be recorded (Appendix B), and what airworthiness standards must be met before return to service. Every task card you write must identify its regulatory basis within Part 43—typically by citing the applicable category in Appendix A so that the correct approval authority and return-to-service endorsement are clear.

14 CFR Part 65 establishes the certification requirements for aviation mechanics holding an Airframe (A) certificate, a Powerplant (P) certificate, or both—the combined A&P. Part 65 defines the privileges and limitations of each certificate. As a student, you work under the direct supervision of a certificated mechanic; your work-order package must reflect who holds the certificate of approval for each task.

FAA-Approved Data: The Data-Reference Log

No maintenance action is legal unless it is performed in accordance with FAA-approved data. Approved data sources include:

• The aircraft manufacturer's current-revision maintenance manual (MM)
• Airworthiness Directives (ADs)—mandatory; issued under 14 CFR Part 39
• FAA Advisory Circulars such as AC 43.13-1B (Acceptable Methods, Techniques, and Practices—Aircraft Inspection and Repair) and AC 43.13-2B (Acceptable Methods, Techniques, and Practices—Aircraft Alterations)—acceptable but not mandatory unless adopted by reference in an AD or the MM
• Manufacturer Service Bulletins (SBs)—advisory unless incorporated by an AD
• Supplemental Type Certificate (STC) data sheets when applicable

Your data-reference log must list each source by title, document number, revision or date, and the specific task or section it supports. Consulting an out-of-date manual revision is a common and serious error; always verify the current revision before beginning any documentation.

The FAA AD portal (accessible through the FAA website) is the authoritative database for searching ADs by aircraft make, model, or component. Search both the aircraft type certificate and any installed appliances. Record every applicable AD: its number, effective date, compliance interval, and whether it has been complied with, is due, or is not applicable.

Building the Task-Card Set

A task card is a single-page or single-screen document that defines one discrete maintenance action. A well-built task card contains:

1. Task title and unique card number for traceability

2. Regulatory basis (e.g., 14 CFR Part 43 Appendix A, major repair category, or preventive maintenance item)

3. Approved data reference with revision

4. Step-by-step procedure in imperative language

5. Required tools, equipment, and consumables

6. Required parts with part numbers and quantities

7. Estimated labor hours

8. Inspection hold points—steps that must be verified by an authorized inspector before work continues

9. Sign-off blocks for performing technician and approving certificate holder

Sequence your task cards logically: tasks that require access panels to be open must precede tasks that close them; leak checks follow component installation; operational tests follow leak checks. Poor sequencing forces work to be undone and redone, wasting hours and introducing error.

The Project Safety Plan

Aviation maintenance environments contain multiple energy hazards. Your written safety plan must identify each hazard category present in your project scope and specify controls before work begins.

Lockout/Tagout (LOTO): The OSHA standard for the control of hazardous energy (29 CFR 1910.147) applies in all maintenance shops. For aircraft, this means de-energizing and physically locking out electrical buses, hydraulic systems, and pneumatic lines before work on those systems begins. Each LOTO step in your safety plan must name the energy source, the isolation point (circuit breaker, valve, disconnect), the lock or tag type, and the verification method (e.g., attempt to operate the actuator after isolation to confirm zero energy state).

PPE by task: Assign specific PPE to each task rather than listing PPE generically. Fuel system work requires chemical-resistant gloves and eye protection rated for fuel splash; sheet metal cutting requires hearing protection and cut-resistant gloves; battery work requires face shield and acid-resistant gloves. Safety glasses are the baseline PPE for all shop work.

Electrical hazards: Confirm aircraft master switch is off and battery disconnected before work on electrical systems. Use a multimeter to verify zero voltage at the work point.

Fuel hazards: Ensure adequate ventilation, eliminate ignition sources, and have an appropriate class fire extinguisher within reach before opening any fuel line.

Hydraulic and pneumatic hazards: Depressurize systems to zero before breaking any fitting. Trapped hydraulic fluid under pressure can inject through skin at levels that cause serious injury.

Completing the Work-Order Package

The finished package submitted for instructor review contains: (1) the data-reference log, (2) a parts list with part numbers and quantities, (3) the full sequenced task-card set, and (4) the written safety plan. Every page must be dated and identified with the aircraft registration number and project scope. This package is not busywork—it is the same documentation discipline that certificated mechanics use every day in certificated repair stations and airline maintenance operations. Mastering it here is mastering a core professional skill.