Can there be a line station with only one person (certifier) and that this is not directly employed by the organization, that is, that it is hired?

EASA ANSWER:

Line stations staffed with one person (the certifying staff) contracted externally may require attention, in particular ensuring:

• this arrangement is sufficient for the work to be performed, the relevant number of aircraft and associated transit schedule. This should take also into account:
  • all maintenance carried out on non-EU aircraft and on behalf of other maintenance organisations (where applicable) [point 2 of AMC 1 145.A.30 (d)].
  • the planned absences (e.g. training, vacation) [point 2 of AMC 1 145.A.30(d)].
  • human performance limitations (145.A.47(b)).
• the arrangement is durable and provides organisational stability [in the spirit of point 1 of AMC 1 145.A.30 (d)].
• the certifying staff is appropriately licenced for the work to be performed. If he/she is only B1 licensed, the organisation should have a procedure on how to deal with work requiring B2 certifying staff [see 145.A.30 (g) and points (3) and (4) of AMC 145.A.30 (g)].
• Contracted staff has a good knowledge and understanding of the Part-145 MOE procedures"