Maintenance Terminology Explained

Aircraft and maintenance planning

Aircraft
An individual aircraft in your fleet. Each aircraft has its own registration, usage data, maintenance status, defects, work orders, components, and technical records.

Aircraft model
A shared model setup used across one or more aircraft. Aircraft models can help define common structure, compatibility, maintenance requirements, and configuration that applies to aircraft of the same type.

Flight logs
Usage records such as hours, cycles, landings, tach time, or other counters used for maintenance tracking. These values can be used to calculate due maintenance.

Recurring Maintenance
A maintenance requirement that repeats based on calendar time, hours, cycles, or another configured counter. This may previously have been referred to as a maintenance schedule.

AMP Program
An Aircraft Maintenance Program used to define structured maintenance requirements for aircraft. AMP Programs may include revisions, requirements, applicability, and activation controls.

Task Library
A collection of reusable task templates. Task library content helps planners create consistent task instructions for work orders and work packages.

AMP Task Library
A task library connected to AMP-related maintenance planning. It helps support structured program-based maintenance requirements.

Work planning

Work order
A controlled maintenance record used to plan, release, execute, complete, and close specific maintenance work. Work orders move through workflow states such as draft, planned, released, in progress, on hold, completed, and closed.

Work package
A group of maintenance work planned together. Work packages help organize multiple tasks or work orders around the same aircraft, downtime window, inspection, or maintenance event.

Task
A specific piece of work inside a work order. Tasks should contain enough information for workshop users to understand what needs to be done.

Defect
An issue, discrepancy, or fault found on an aircraft. A defect can be reported in FlightLogger Maintenance or, when integrated, come from FlightLogger. Defects are a source of maintenance work, but they are not the same as work execution.

Due maintenance
Maintenance that is approaching or has passed its required date, hours, cycles, or other limit.

Maintenance status
The system’s indication of an aircraft’s maintenance readiness based on available maintenance, usage, defect, component, and compliance information.

Inventory and parts

Item
A catalog record for a part, material, consumable, or tool. An item usually represents the part number or defined inventory item, not a specific physical unit.

Stock
The physical quantity of an item held at one or more locations. Stock tells you how much you have and where it is located.

Available stock
The quantity that can actually be used. Available stock may be lower than on-hand stock because some quantity may be reserved, held, expired, quarantined, or otherwise allocated.

Serialized item
A physical unit that is tracked individually by serial number. Serialized items are used when each unit needs its own traceability, condition, lifecycle, or installation history.

Batch
A group of items with shared traceability information, such as certificate details, supplier, receiving history, expiry, or condition. Batches are important for compliance and audit history.

Location
A physical or logical place where stock is stored, such as a warehouse, shelf, bin, workshop location, or staging area.

Hold / Quarantine
A state used for stock that cannot be used until it has been reviewed or dispositioned. Depending on your account terminology, this may appear as Hold or Quarantine.

Receiving inspection
The process used to inspect and accept, reject, or hold received goods before they become available as stock.

Reservation
A quantity of stock reserved for a future need, often linked to a work order. Reserved stock reduces what is available for other work.

Pick list
A warehouse workflow used to physically collect stock for a work order or other demand. Completing a pick list means the requested lines have been picked or resolved; it does not by itself complete the maintenance work.

Components and technical records

Component
A part installed on an aircraft and tracked as part of the aircraft structure. Components can have installation history, placement, usage, and maintenance relevance.

Installation period
The period during which a component or serialized item is installed on an aircraft or within another component. Installation periods help preserve component history.

Technical record
Formal maintenance documentation connected to completed work, aircraft history, release documentation, or compliance evidence. Technical records support traceability and audit readiness.

CRS
Certificate of Release to Service. A controlled release record or signoff confirming that maintenance has been completed and released according to applicable requirements.

Workshop execution

Workshop
The area where released maintenance work is executed. Workshop users work on active work orders, complete tasks, record time, use tools, raise findings, and complete signoffs.

Active work order
A work order that has been released to the workshop and can be worked on by technicians or workshop staff.

Time entry
A record of time spent on maintenance work. Time entries help document labor and support traceability.

Tool usage
A record showing that a tool was used during maintenance work. If tool control is enabled, the system can track controlled tool instances and calibration eligibility.

Finding
A task-level observation, discrepancy, or issue raised during maintenance execution.

Non-conformity
A broader quality or compliance issue that may require corrective action.

Signoff
A controlled confirmation that a task, inspection, function test, CRS step, or final approval has been completed by an authorized person.

Purchasing

Supplier
A company or organization that provides parts, materials, tools, or services.

Order request
A request to purchase missing or required material. Order requests may be created from stock demand, reservations, or maintenance planning needs.

Purchase order
A formal order sent to a supplier. Purchase orders track what is ordered, quantities, prices, supplier details, and receiving status.

Purchase order line
A specific line on a purchase order for an item, quantity, price, and delivery requirement.

Invoice
A supplier document requesting payment. Invoices can be matched to purchase orders and purchase order lines.

Exchange rate
A currency conversion rate used when purchasing or invoicing involves currencies other than the account’s base currency.

Compliance and airworthiness

Airworthiness Directive (AD)
A mandatory instruction issued by an aviation authority. ADs may require inspection, modification, replacement, or other action.

Service Bulletin (SB)
A manufacturer or type-certificate-holder communication that may recommend or require specific maintenance action depending on applicability and operator requirements.

Service Letter (SL)
A manufacturer communication that may provide guidance, recommendations, or information relevant to maintenance or operation.

Applicability
Whether a requirement such as an AD, SB, SL, or AMP requirement applies to a specific aircraft, model, component, or configuration.

Compliance status
The current state of a compliance item, such as not assessed, applicable, pending, overdue, compliant, or not applicable, depending on the workflow.

Audit readiness
The ability to show complete, structured, and traceable records for maintenance decisions, work performed, parts used, signoffs, and compliance documentation.

Users and permissions

User
A person with access to FlightLogger Maintenance.

Role
A reusable permission set that helps define what a user can see and do.

Permission
A specific access right that controls whether a user can view, create, edit, approve, release, complete, or manage certain records.

Personnel authorization
An account-level authorization defining what maintenance or signoff activity a person is allowed to perform within the organization.

FlightLogger integration

FlightLogger Sync
The integration area used to connect FlightLogger and FlightLogger Maintenance. Depending on configuration, FlightLogger can provide operational inputs such as aircraft usage, hours, cycles, and pilot-reported defects.

OAuth Application
An integration setup used to give an external client controlled API access to FlightLogger Maintenance.

Aircraft sync
Synchronization of aircraft-related records between FlightLogger and FlightLogger Maintenance, depending on the configured integration.

Hours and cycles sync
Synchronization of aircraft usage data used to support maintenance planning and due calculations.

Defect sync
Synchronization of defect information. Defect matching between systems may be based on best-effort rules, so defects should be reviewed carefully when troubleshooting sync issues.

How the terms connect

The most important idea is that FlightLogger Maintenance connects these terms into one operational workflow.

Aircraft and usage data help identify maintenance needs.
Recurring maintenance, AMP Programs, defects, and compliance items create work demand.
Work orders and work packages organize the work.
Inventory and Purchasing help ensure the required parts are available.
Workshop users execute released work and record evidence.
Technical records and compliance workflows preserve the result.

Understanding these terms makes it easier to understand the full maintenance process from setup to planning, execution, and documentation.