Page 32 - UK Continuing Airworthiness Regulations (Consolidated) 201121

ANNEX I - Continuing Airworthiness Requirements

- information exchange systems.
M.A.403 Aircraft defects
(a) Any aircraft defect that hazards seriously the flight safety shall be rectified before further
flight.
(b) Only the authorised certifying staff, according to points M.A.801(b)1, M.A.801(b)2,
M.A.801(c), M.A.801(d) or Annex II (Part-145) can decide, using M.A.401 maintenance
data, whether an aircraft defect hazards seriously the flight safety and therefore decide
when and which rectification action shall be taken before further flight and which defect
rectification can be deferred. However, this does not apply when the MEL is used by the
pilot or by the authorised certifying staff.
(c) Any aircraft defect that would not hazard seriously the flight safety shall be rectified as
soon as practicable, after the date the aircraft defect was first identified and within any
limits specified in the maintenance data or the MEL.
(d) Any defect not rectified before flight shall be recorded in the aircraft continuing
airworthiness record system referred to in point M.A.305 or, if applicable in the aircraft
technical log system referred to in point M.A.306.
M.A.403(b) AMC Aircraft defects
An assessment of both the cause and any potentially hazardous effect of any defect or combination
of defects that could affect flight safety should be made in order to initiate any necessary further
investigation and analysis necessary to identify the root cause of the defect.
M.A.403(d) AMC Aircraft defects
All deferred defects should be made known to the pilot/flight crew, whenever possible, prior to their
arrival at the aircraft.
Deferred defects should be transferred on to worksheets at the next appropriate maintenance check,
and any deferred defect which is not rectified during the maintenance check, should be re-entered on
to a new deferred defect record sheet. The original date of the defect should be retained.
The necessary components or parts needed for the rectification of defects should be made available
or ordered on a priority basis, and fitted at the earliest opportunity.

Section A Subpart E Components
Reference Description
M.A.501 Classification and Installation
(a) All components shall be classified into the following categories:
(1) Components which are in a satisfactory condition, released on a CAA Form 1 or
equivalent and marked in accordance with Subpart Q of Annex I (Part-21) to
Regulation (EU) No 748/2012, unless otherwise specified in Annex I (Part-21) to
Regulation (EU) No 748/2012 or in this Annex (Part-M) or Annex Vd (Part-CAO).
(2) Unserviceable components which shall be maintained in accordance with this
Regulation.
(3) Components categorised as unsalvageable because they have reached their
mandatory life limitation or contain a non-repairable defect.
(4) Standard parts used on an aircraft, engine, propeller or other aircraft component
when specified in the maintenance data and accompanied by evidence of
conformity traceable to the applicable standard.
(5) Material both raw and consumable used in the course of maintenance when the
organisation is satisfied that the material meets the required specification and has
appropriate traceability. All materials must be accompanied by documentation
clearly relating to the particular material and containing a conformity to specification
statement plus both the manufacturing and supplier source.
(b) Components, standard parts and material shall only be installed on an aircraft or a
component when they are in a satisfactory condition, belong to one of the categories
listed in point (a) and the applicable maintenance data specifies the particular component,
standard part or material.
M.A.501(a)(1) AMC1 Classification and installation
CAA FORM 1 OR EQUIVALENT
(a) A document equivalent to an CAA Form 1 may be:
(1) a release document issued by an organisation under the terms of a bilateral
agreement signed by the United Kingdom;
(2) a release document issued by an organisation approved under the terms of a JAA
bilateral agreement until superseded by the corresponding agreement signed by the
United Kingdom;
(3) a JAA Form One issued prior to 28 November 2004 by a JAR 145 organisation
approved by a JAA Full Member State;
(4) in the case of new aircraft components that were released from manufacturing prior
to the Part 21 compliance date, the component should be accompanied by a JAA
Form One issued by a JAR 21 organisation and approved by a JAA Full Member
State within the JAA mutual recognition system;
(5) a JAA Form One issued prior to 28 September 2005 by a production organisation
approved by a competent authority in accordance with its national regulations;
(6) a JAA Form One issued prior to 28 September 2008 by a maintenance organisation
approved by a competent authority in accordance with its national regulations;
(7) a release document issued under the conditions described in Article 4 point 6 of
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