ISO 6702-1-1991 PDF

Full title and description

Aircraft — Requirements for on-board weight and balance systems — Part 1: General (ISO 6702-1:1991). Specifies general requirements for the function, characteristics and installation of on-board weight and balance systems intended for use on civil transport aircraft.

Abstract

ISO 6702-1:1991 defines the general requirements for an on-board weight and balance system (OBWBS) used in civil transport aircraft, covering the system’s intended functions, key characteristics and installation considerations. This first-edition Part 1 cancels and replaces ISO 6702:1984.

General information

• Status: Published (International Standard confirmed).
• Publication date: 14 November 1991 (first published in November 1991; publication record shows release in mid-November 1991).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 49.090, 49.120.
• Edition / version: Edition 1 (1991).
• Number of pages: 14.

Scope

Part 1 provides the general (overall) requirements that an on-board weight and balance system must meet when installed on civil transport aircraft. It addresses the system’s intended functions, installation principles and the classes of systems (by required confidence and accuracy) used to indicate aircraft mass and centre-of-gravity or balance condition. Part 1 serves as the general/overview element of the ISO 6702 series; detailed design, performance and interface characteristics are covered in the companion Part 2.

Key topics and requirements

• General functional requirements for on-board weight and balance systems (OBWBS): capability to determine and present aircraft mass and balance condition reliably.
• Classification of systems by confidence/accuracy (three classes: Class I, Class II, Class III) and associated expected performance/usage profiles.
• Basic installation and integration requirements for aircraft fitment (installation practices, mounting, interfaces and environmental/operational considerations).
• Requirements for system characteristics such as accuracy, measurement principles, human‑machine presentation and basic failure/alert behaviour.
• Reference to series structure where Part 2 addresses detailed design, performance and interface characteristics (e.g., data interfaces).

Typical use and users

Used by aircraft and avionics manufacturers, avionics system integrators, certification and regulatory authorities, airlines and maintenance organizations. It is intended to guide designers and installers of on-board weight and balance systems, and to inform certification and operational procedures for systems that provide aircraft mass and balance information.

Related standards

ISO 6702-1:1991 is part of the ISO 6702 series; it cancels and replaces ISO 6702:1984 and is paired with ISO 6702-2 (Part 2: design, performance and interface characteristics). National/adopted versions and related aerospace avionics interface and data standards (referenced by implementers) are commonly used alongside this ISO series.

Keywords

on-board weight and balance, OBWBS, aircraft mass, centre of gravity, aircraft balance, installation requirements, system classes, accuracy, avionics interface.

FAQ

Q: What is this standard?

A: ISO 6702-1:1991 is an International Standard that sets out general requirements for on-board weight and balance systems for civil transport aircraft.

Q: What does it cover?

A: It covers the system’s functions, principal characteristics and installation considerations, and defines system classes by required confidence/accuracy. Detailed design, performance and interface characteristics are addressed in Part 2 of the series.

Q: Who typically uses it?

A: Aircraft manufacturers, avionics designers and integrators, certification bodies, airlines and maintenance organizations use the standard when specifying, installing, certifying or operating on-board weight and balance systems.

Q: Is it current or superseded?

A: ISO 6702-1:1991 remains a published international standard. The ISO record shows the publication was reviewed and confirmed in 2024, so this edition remains current (not withdrawn).

Q: Is it part of a series?

A: Yes. ISO 6702-1 is Part 1 (General) of the ISO 6702 series; Part 2 covers design, performance and interface characteristics. ISO 6702-1:1991 cancels and replaces the earlier ISO 6702:1984.

Q: What are the key keywords?

A: Key keywords include on-board weight and balance, OBWBS, aircraft mass, centre of gravity, installation, accuracy, system classes, avionics interface.