21.B.135 Maintenance of the letter of agreement

The competent authority shall maintain the letter of agreement for as long as:

(a)the manufacturer properly uses the EASA Form 52 (see Appendix VIII) as a statement of conformity for complete aircraft, and the EASA Form 1 (see Appendix I) for products other than complete aircraft, parts, appliances, control and monitoring units (CMUs) and CMU components; and

(b)inspections performed by the competent authority of the Member State before validation of the EASA Form 52 (see Appendix VIII) or the EASA Form 1 (see Appendix I), as per point 21.A.130(c) did not reveal any findings of non-compliance with the requirements or the procedures as contained in the manual provided by the manufacturer, or any non-conformity of the respective products, parts or appliances. These inspections shall check at least that:

1.the agreement covers the product, part, appliance, control and monitoring unit (CMU) or CMU component to be validated, and remains valid;

2.the manual described in point 21.A.125A(b) and its change status referred in the letter of agreement is used as basic working document by the manufacturer. Otherwise, the inspection shall not continue and therefore the release certificates shall not be validated;

3.production has been carried out under the conditions prescribed in the letter of agreement and satisfactorily performed;

4.inspections and tests (including flight tests, if appropriate), as per points (b)(2) and/or (b)(3), have been carried out under the condition prescribed in the letter of agreement and satisfactorily performed;

5.the inspections by the competent authority described or addressed in the letter of agreement have been performed and found acceptable;

6.the statement of conformity complies with point 21.A.130, and the information provided by it does not prevent its validation; and

(c)any termination date for the letter of agreement has not been reached.