--- title: "NCO.SPEC.110 Pilot-in-command responsibilities and authority — Part-NCO · Avioverse" description: "Whenever crew members or task specialists are involved in the operation, the pilot-in-command shall (a) ensure compliance of crew members and task…" url: "https://avioverse.aero/regulations/easa/air-ops/part-nco/subpart-e/nco-spec-110" --- # NCO.SPEC.110 Pilot-in-command responsibilities and authority ANNEX VII (Part-NCO) · Regulation (EU) No 965/2012 · EAR revision 27 Mar 2026 IR Implementing rule ## NCO.SPEC.110 Pilot-in-command responsibilities and authority Whenever crew members or task specialists are involved in the operation, the pilot-in-command shall (a) ensure compliance of crew members and task specialists with NCO.SPEC.115 and NCO.SPEC.120; (b) not commence a flight if any [crew member](https://avioverse.aero/glossary/easa/crew-member) or [task specialist](https://avioverse.aero/glossary/easa/task-specialist) is incapacitated from performing duties by any cause such as injury, sickness, fatigue or the effects of any psychoactive substance; (c) not continue a flight beyond the nearest [weather-permissible aerodrome](https://avioverse.aero/glossary/easa/weather-permissible-aerodrome) or [operating site](https://avioverse.aero/glossary/easa/operating-site) when any crew member or task specialist’s capacity to perform duties is significantly reduced from causes such as fatigue, sickness or lack of oxygen; (d) ensure that crew members and task specialists comply with the laws, regulations and procedures of those States where operations are conducted; (e) ensure that all crew members and task specialists are able to communicate with each other in a common language; and (f) ensure that task specialists and crew members use supplemental oxygen continuously whenever he/she determines that at the altitude of the intended flight the lack of oxygen might result in impairment of the faculties of crew members or harmfully affect task specialists. If the pilot-in-command cannot determine how the lack of oxygen might affect the occupants on board, he/she shall ensure that task specialists and crew members use supplemental oxygen continuously whenever the cabin altitude exceeds 10 000 ft for a period of more than 30 minutes and whenever the cabin altitude exceeds 13 000 ft. IR · NCO.SPEC.110 — Regulation (EU) No 965/2012 · Regulation (EU) 2016/1119 · Air OPS Easy Access Rules · EAR revision 27 Mar 2026 AMC Acceptable means of compliance ## AMC1 NCO.SPEC.110(f) Pilot-in-command responsibilities and authority DETERMINATION OF SUPPLEMENTAL OXYGEN NEED When determining the need for supplemental oxygen carriage and use, the pilot-in-command should: (a) in the preflight phase: (1) be aware of hypoxia conditions and associated risks; (2) consider the following objective conditions for the intended flight: (i) altitude; (ii) duration of the flight; and (iii) any other relevant operational conditions; (3) consider individual conditions of flight crew members and task specialists in relation to: (i) altitude of the place of residence; (ii) smoking; (iii) experience in flights at high altitudes; (iv) actual medical conditions and medications; (v) age; (vi) disabilities; and (vii) any other relevant factor that may be detected, or reported by the person; and (4) when relevant, ensure that all flight crew members and task specialists are briefed on hypoxia conditions and symptoms, as well as on the usage of supplemental oxygen equipment. (b) during flight: (1) monitor for early symptoms of hypoxia conditions; and (2) if detecting early symptoms of hypoxia conditions: (i) consider to return to a safe altitude, and (ii) ensure that supplemental oxygen is used, if available. AMC · AMC1 NCO.SPEC.110(f) — Regulation (EU) No 965/2012 · ED Decision 2016/018/R · Air OPS Easy Access Rules · EAR revision 27 Mar 2026 GM Guidance material ## GM1 NCO.SPEC.110(f) Pilot-in-command responsibilities and authority DETERMINATION OF SUPPLEMENTAL OXYGEN NEED (a) The responsibility of the pilot-in-command for safety of all persons on board, as required by NCO.GEN.105(a)(1), includes the determination of need for supplemental oxygen use. (b) The altitudes above which NCO.SPEC.110(f) requires oxygen to be available and used are applicable to those cases when the pilot-in-command cannot determine the need for supplemental oxygen. However, if the pilot-in-command is able to make this determination, he/she may elect in the interest of safety to require oxygen also for operations at or below such altitudes. (c) The pilot-in-command should be aware that flying below altitudes mentioned in NCO.SPEC.110(f) does not provide absolute protection against hypoxia symptoms, should individual conditions and aptitudes be prevalent. GM · GM1 NCO.SPEC.110(f) — Regulation (EU) No 965/2012 · ED Decision 2016/018/R · Air OPS Easy Access Rules · EAR revision 27 Mar 2026 GM Guidance material ## GM2 NCO.SPEC.110(f) Pilot-in-command responsibilities and authority DETERMINATION OF OXYGEN NEED — BEFORE FLIGHT Detailed information and guidance on hypoxia conditions and symptoms, content of the briefing on hypoxia and assessment of individual conditions may be found in the EASA leaflet ‘Hypoxia’. DETERMINATION OF OXYGEN NEED — IN FLIGHT Several methods for monitoring hypoxia early symptoms may be used and some methods may be aided by personal equipment, such as finger-mounted pulse oximeters. Detailed information and guidance on entering hypoxia conditions, on hypoxia symptoms early detection, and on use of personal equipment such as finger-mounted pulse oximeters or equivalent may be found in the EASA leaflet ‘Hypoxia’. GM · GM2 NCO.SPEC.110(f) — Regulation (EU) No 965/2012 · ED Decision 2016/018/R · Air OPS Easy Access Rules · EAR revision 27 Mar 2026 [All rules in SUBPART E: SPECIFIC REQUIREMENTS](https://avioverse.aero/regulations/easa/air-ops/part-nco/subpart-e) Consolidated from the EASA Easy Access Rules (revision 27 Mar 2026, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.