- Troubleshooting and/or defect rectification not requiring special ground support usually relevant to base maintenance (e.g.: special equipment, structured production planning, complex and lengthy maintenance);
- Scheduled or unscheduled component replacement with use of external test equipment if required, excluding any major components, where the related maintenance procedures clearly address the need of a hangar environment requiring special ground support equipment and/or structured production planning and/or complex and lengthy maintenance, such as for example a full landing gear replacement, simultaneous replacement of two engines, etc.;
- Minor repairs and modifications, which do not require extensive disassembly and can be accomplished by simple means;
- Minor scheduled line maintenance (if those scheduled tasks not exceeding the weekly check as specified in the aircraft maintenance programme);
