Part B - Verifications and approval requirements 
73 
Once the loading condition definitions have been defined and evaluated, load calculations 
shall be performed with regard to the complete structural dynamics and presented to the ap 
pointed inspector for examination. The appointed inspector shall check the plausibility of the 
loading assumptions and the results based on exemplary calculations. The comparison be 
tween parallel calculations and those in the presented load calculations shall form a basis for 
the decision on whether to accept the loading assumptions and to issue the verification report 
for the loading assumptions. 
Should the site-specific loading assumptions be below those specified in the type certifica 
tion, the certificate of conformity for the site-specific design review of the RNA may be is 
sued. 
Should the site-specific loading assumptions exceed those specified in the type certification, 
the stress reserve for all components affected by the increased loads shall be reviewed - 
which may possibly require the design to be accordingly modified - and submitted for exami 
nation. In this case, the certificate of conformity for the site-specific design review of the RNA 
shall be issued following the inspection of the stress reserve and possible modification of the 
design. 
4.3.3 Documents to be submitted when applying for the 2 nd release 
[Doc. No. 420] 
[Doc. No. 421] 
[Doc. No. 422] 
[Doc. No. 423] 
Offshore type certificate for the tested installation type including the verifica 
tion reports and certificates of conformity on which this is based 
Site-specific loading assumptions, incl. reserve verification 
Site-specific modifications to the RNA, where required and 
Verification report pertaining to Docs. No. 421 and 422 and certificate of con 
formity pertaining to the site-specific design review. 
4.4 Implementation phase 
The requirements pertaining to the implementation phase are specified in chapter B1.3.4. The 
RNA components to be given consideration during the monitoring of the production phase 
and the respective production processes are to be specified for the project in question in ac 
cordance with chapters B1.3.4 and B2.4.2.1 - but shall include at least the following main 
components: 
• Rotor blades 
• Rotor hub 
• Rotor shaft or king pin 
• Machine frame 
• Nacelle installation 
• Other components, the failure of which could destroy the RNA or endanger humans 
4.5 Operating phase 
Proper operation of the RNA is crucial to the structural integrity and stability of the offshore 
wind turbine. The requirements pertaining to the operating phase are described in chapters 
B1.3.5 and B2.5.3 as well as in Table 4-1 below.