FAA Order 8130.34D — UAS Operating Limitation A-36
Appendix A · p. A-8
The UAS manufacturer and their representatives may perform the maintenance and inspections required by these operating limitations. Representatives of a manufacturer must have written authorization from the manufacturer. The use of FAA certificated maintenance providers is encouraged, which may include repair stations, holders of mechanic and repairman certificates, and other persons working under the supervision of these mechanics and repairman. An FAA certificated maintenance provider performing maintenance and/or inspection on UAS that are not applicable to requirements, , does not constitute at this time the exercising of certificate holder privileges.
Verify it yourself: the eyeball above opens the exact page of Order 8130.34D with this limitation highlighted.