Definition
Maintenance records kept for individual aircraft appliances — such as propellers, magnetos, autopilots, or emergency locator transmitters — documenting their installation, inspections, repairs, overhauls, and time in service separately from the airframe and engine logbooks.
Plain English
Separate record books for certain aircraft components that have their own maintenance history, kept apart from the main airframe and engine records.
Context Anchor
Seen during preflight assessment when reviewing aircraft records before deciding whether the airplane is legal and safe to fly.
Derivation
In aviation, an 'appliance' is a regulatory term (14 CFR Part 1) for an instrument, mechanism, or piece of equipment used in operating the aircraft but not part of the airframe, engine, or propeller itself. A logbook is simply the running record of its life and maintenance.
Why Pilots Care
Pilots must confirm these records are current and free of open discrepancies before flight, since unaddressed issues on installed equipment can affect safety and legality.
Intuition Check
Do not read “appliance” as a kitchen appliance. In this context, an appliance is installed aircraft equipment, such as an instrument or radio.
Example Sentence 1
Before the flight, the pilot reviewed the appliance logbooks to confirm the ELT battery was within its replacement interval.
Example Sentence 2
Any open discrepancy found in the appliance logbooks must be resolved or properly deferred before the aircraft is released for flight.