What should a person performing maintenance do to minimise the risk of errors and prevent omissions?

The person performing maintenance should ensure that every maintenance task is signed off only after completion, that the grouping of tasks for sign-off allows critical steps to be clearly identified, and that any work performed by personnel under supervision is checked and signed off by an authorised person.

When should a maintenance task be signed off according to AMC1 ML.A.402(b)(7)?

A maintenance task should be signed off only after completion.

How should tasks be grouped for the purpose of sign-off under AMC1 ML.A.402(b)(7)?

Tasks should be grouped in a way that allows critical steps to be clearly identified.

Who is responsible for checking and signing off work performed by temporary staff or trainees under AMC1 ML.A.402(b)(7)?

Work performed by personnel under supervision (i.e. temporary staff, trainees) must be checked and signed off by an authorised person.

Does AMC1 ML.A.402(b)(7) require that supervised work be checked before or after sign-off?

The AMC states that any work performed by personnel under supervision is checked and signed off by an authorised person, implying the check occurs before or at the time of sign-off.

What is the purpose of grouping tasks for sign-off as described in AMC1 ML.A.402(b)(7)?

The purpose is to allow critical steps to be clearly identified, thereby minimising the risk of errors and preventing omissions.

Which types of personnel are explicitly mentioned as working under supervision in AMC1 ML.A.402(b)(7)?

Temporary staff and trainees are explicitly mentioned as personnel under supervision.

Is it acceptable under AMC1 ML.A.402(b)(7) to sign off a maintenance task before it is fully completed?

No, every maintenance task must be signed off only after completion.

Does AMC1 ML.A.402(b)(7) specify who is considered an 'authorised person' for signing off supervised work?

No, the AMC does not define 'authorised person'; it only states that work under supervision must be checked and signed off by an authorised person.

AMC1 ML.A.402(b)(7) Performance of maintenance

Q: What are the three specific actions a person performing maintenance should ensure according to AMC1 ML.A.402(b)(7)?

The three actions are: (a) every maintenance task is signed off only after completion; (b) the grouping of tasks for sign-off allows critical steps to be clearly identified; and (c) any work performed by personnel under supervision is checked and signed off by an authorised person.

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AMC1 ML.A.402(b)(7) Performance of maintenance

ED Decision 2020/002/R

To minimise the risk of errors and to prevent omissions, the person performing maintenance should ensure that:

(a) every maintenance task is signed off only after completion;

(b) the grouping of tasks for the purpose of sign-off allows critical steps to be clearly identified; and

(c) any work performed by personnel under supervision (i.e. temporary staff, trainees) is checked and signed off by an authorised person.

Details

Source-Title: AMC1 ML.A.402(b)(7) Performance of maintenance View latest amendments

Erulesid: ERULES-1963177438-15980 Compare versions

Domain: Continuing airworthiness

Applicabilitydate: 24 March, 2020

Entryintoforcedate: 14 March, 2020

Regulatorysource: ED Decision 2020/002/R Navigate

Regulatorysubject: Part-ML

Typeofcontent: AMC to IR (Acceptable means of compliance to implementing rule)

Parentir: ML.A.402 Performance of maintenance

Origin: EASA

Category: EAR