GM1 to Annex II (Part-145) Definitions

CAA ORS9 Decision No. 38

For the purpose of the AMC & GM to Part-145, the following definitions are used:

Audit refers to a systematic, independent, and documented process for obtaining evidence, and evaluating it objectively to determine the extent to which requirements are complied with. Note: Audits may include inspections.
Assessment

in the context of management system performance monitoring, continuous improvement and oversight, refers to a planned and documented activity performed by competent personnel to evaluate and analyse the achieved level of performance and maturity in relation to the organisation’s policy and objectives.

Note: An assessment focuses on desirable outcomes and the overall performance, looking at the organisation as a whole. The main objective of the assessment is to identify the strengths and weaknesses to drive continual improvement.

Remark: For ‘risk assessment’, please refer to the definition below.

Base maintenance Ref. AMC1 145.A.10
Base maintenance hangar refers to a closed facility that can house an aircraft and protect it from environmental conditions.
Competency is a combination of individual skills, practical and theoretical knowledge, attitude, training, and experience.
Correction is the action to eliminate a detected non-compliance.
Corrective action is the action to eliminate or mitigate the root cause(s) and prevent the recurrence of an existing detected non-compliance, or other undesirable conditions or situations. Proper determination of the root cause(s) is crucial for defining effective corrective actions to prevent reoccurrence.
Error

is an action or inaction by a person that may lead to deviations from accepted procedures or regulations.

Note: Errors are often associated with occasions when a planned sequence of mental or physical activities either fails to achieve its intended outcome, or is not appropriate with regard to the intended outcome, and when results cannot be attributed purely to chance.

Fatigue is a physiological state of reduced mental or physical performance capability resulting from sleep loss or extended wakefulness, circadian phase, or workload (mental and/or physical activity) that can impair a person’s alertness and ability to safely perform his or her tasks.
Hazard is a condition or an object with the potential to cause or contribute to an aircraft incident or accident.
Human factors is anything that affects human performance, which means principles that apply to aeronautical activities, and which seek safe interface between the human and other system components by proper consideration of human performance.
Human performance refers to human capabilities and limitations which have an impact on the safety and efficiency of aeronautical activities.
Inspection

in the context of compliance monitoring and oversight, refers to an independent documented conformity evaluation by observation and judgement accompanied, as appropriate, by measurement, testing or gauging, in order to verify compliance with applicable requirements.

Note: Inspection may be part of an audit (e.g. product audit), but may also be conducted outside of the normal audit plan; for example, to verify closure of a particular finding.

Just culture Ref. UK Regulation (EU) No 376/2014, Article 2.
Line maintenance Ref. AMC1 145.A.10
Near miss

is an event in which an occurrence to be mandatorily reported according to UK Regulation (EU) No 376/2014 was narrowly averted or avoided.

Example: A mechanic on rechecking his or her work at the end of a task realises that one work card step was not properly carried out.

Organisational factor is a condition that affects the effectiveness of safety risk controls, related to the culture, policies, processes, resources, and workplace of an organisation.
Oversight planning cycle refers to the time frame within which all areas of the approval and all processes should be reviewed by the CAA by means of audits and inspections.
Oversight programme refers to the detailed oversight schedule that defines the number of audits and inspections, the scope and duration of each audit and inspection, including details of product audits and locations, as appropriate, to be performed by the CAA, and the tentative time frame for performing each audit and inspection.
Person

A person should be interpreted in accordance with the Interpretation Act 1978 and includes a natural or legal person(s), an organisation(s), a single person or a group of persons.

The AMC and GM provides further guidance where the intended meaning of a person should be understood in its plural form, i.e. a group of persons.

Preventive action is the action to eliminate the cause of a potential non-compliance or other undesirable potential situations.
Risk assessment is an evaluation based on engineering and operational judgement and/or analysis methods in order to establish whether the achieved or perceived risk is acceptable or tolerable.
Safety culture is an enduring set of values, norms, attitudes, and practices within an organisation concerned with minimising the exposure of the workforce and the general public to dangerous or hazardous conditions. In a positive safety culture, a shared concern for, commitment to, and accountability for safety is promoted.
Safety risk refers to the predicted probability and severity of the consequences or outcomes of a hazard.
Safety training

refers to dedicated training to support safety management policies and processes, including human factors training.

Note: The main purpose of the safety training programme is to ensure that personnel at all levels of the organisation maintain their competency to fulfil their roles safely. Safety training should, in particular, consider the safety knowledge derived from hazard identification and risk management processes, and support the fostering of a positive safety culture.

Note: Safety management training refers to specific training for the staff involved in safety management functions in accordance with point 145.A.30(b)(3) or 145.A.200(a)(3).

Working days refer to days between and including Monday to Friday, not including public holidays.