Photo below shows a structure with partial protection. It is the assumption of NFPA 25 that the system was installed correct and approved, therefore it is not a requirement for the inspector to note the missing protection photographed below.
In an otherwise sprinkler protected warehouse we find an area that isn't sprinklered. This finding is outside the scope of a NFPA 25 inspection. The system was approved as is and is assumed to be correct (by NFPA 25 standards):