The Continuing Airworthiness Management Organisation (CAMO) has to evaluate the cumulative effect of many modifications. Does the DOA have to, therefore, provide the CAMO with Safety Assessment data?
The determination of a cumulative effect must be made within the justification of flight safety that is based upon the specific configuration. With that in mind, the CAMO will not evaluate the combined effect but rather assess conformity to the approved condition.
The applicant for a flight conditions approval may be asked to provide a safety assessment to the approving organisation.
When an STC is installed, the installer is obliged to determine possible incompatibilities of the intended installation with other design that may already be installed. In such cases, the CAMO may need to contact the DOA to get further advice or need approved changes to the installation instructions.