GM2
ATM/ANS.OR.C.005(b)(1) Safety support assessment and assurance of changes to
the functional system
ED Decision 2017/001/R
This requirement is seeking verification because it is a simple cross-check of available material, i.e. that the specification reflects the requirements of other parts of this Regulation.
(a) Behaviour
ATM/ANS.OR.C.005(b)(1)(ii) requires that the service meets its specification. Consequently, the specification must be complete and valid, i.e. it includes the behaviour addressed in ATM/ANS.OR.C.005(b)(1)(iii) and any additional behaviour in the specified context.
(b) Compliance with other requirements
(1) ATM/ANS.OR.C.005(b)(1)(iii) requires the service providers to identify all parts of this Regulation that impose behaviour on the changed service and also includes any conditions attached to the certificate. They have to identify only those parts of this Regulation that describe required behaviour relevant to the changed service. The identified behaviour shall be included in the specification of the changed service.
Note that the Regulation or conditions attached to the certificate may render compliance with technical standards and ICAO SARPs mandatory.
(2) Compliance with other non-mandatory standards may also be a necessary condition for other reasons.
(3) ATM/ANS.OR.C.005(b)(1)(iii) does not state that the service only meets the requirements of the other parts of this Regulation. It may do other things as well, as described in (5) below.
(4) In ATM/ANS.OR.C.005(b)(1)(iii), ‘does not contradict’ is used to express the concern that behaviour beyond that required by a standard might cause the behaviour required by the standard to be undermined.
(5) The behaviour of a service is likely to include behaviour unspecified in standards; such behaviour may come from:
(i) the behaviour of degraded modes of operation;
(ii) additional behaviour not required by the standard, but put there for commercial purposes, e.g. competitive edge; or
(iii) other behaviour identified by the customer, e.g. an air traffic services provider.
(6) Consequently, the total behaviour should be specified.
EASA aviation regulations require ATM/ANS service providers to ensure changes to functional systems meet specifications and comply with all relevant regulatory requirements. Specifications must include all behaviors, even those beyond mandatory standards, to avoid undermining required behaviors and ensure overall safety and compliance.
* Summary by Aviation.Bot - Always consult the original document for the most accurate information.
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