What must be followed at all times during propeller maintenance?

• A. Personal preferences in maintenance order.
• B. Random tips from internet forums.
• C. Maintenance manual procedures.
• D. Maintenance schedules that are unrelated.

Answer: (C)

Propeller maintenance must be performed strictly according to the procedures in the maintenance manual. These procedures provide the approved sequence of steps, required tools, torque values, lubrication specifications, inspection criteria, and acceptance limits needed to ensure proper balance, alignment, and safe operation. Deviating from these instructions, relying on personal preferences, or following unverified tips from forums can miss critical steps, lead to improper tolerances, or create safety hazards. Similarly, maintenance schedules that aren’t tied to the actual procedures won’t ensure the work is done correctly or within limits. In short, using the maintenance manual procedures every time keeps the work consistent, safe, and compliant with airworthiness requirements.