6.1 Authority of the Pilot-in-Command & the Sterile Flight Deck

What the pilot-in-command's authority means

Nig. CARs Part 8 vests responsibility for the safe conduct of the flight in the pilot-in-command (PIC). That authority appears throughout the Part in concrete duties rather than as a slogan:

Delegation, and its limit

Several of these duties carry an identical note in the regulation: "When cabin crew members are required in a commercial air transport operation, the PIC may delegate this responsibility, but shall ascertain that the proper briefing has been conducted before take-off."

Two lessons follow. First, cabin crew perform the safety briefing as the PIC's delegates, which is why the briefing content and its timing are not negotiable and cannot be shortened for a late departure. Second, delegation does not transfer accountability. The PIC must satisfy themselves that it happened, which is what the cabin secure report provides. A crew member who reports the cabin secure without having completed the briefing has given the PIC a false basis for departure.

The senior cabin crew member

Part 8 uses the abbreviation SCCM for senior cabin crew member, and Part 9 requires the operator's manual structure to distinguish the senior cabin crew member from other cabin crew members. In practice the SCCM:

• Is the single point of contact between the flight deck and the cabin, so that the flight crew receive one consolidated report rather than four;
• Allocates and confirms door and equipment assignments for the sector;
• Issues arm and disarm commands and receives the cross-check reports;
• Makes the cabin secure report before departure and before landing;
• Receives the emergency briefing from the PIC and relays it to the cabin crew;
• Together with the PIC, makes exit row seating determinations under 8.9.2.11 where the operations manual so provides;
• Leads the cabin in an emergency and initiates evacuation if the flight deck is incapacitated or no order is received when the situation clearly demands one.

Passengers must comply

Nig. CARs 8.9.2.1 is short and powerful: each passenger on a commercial air transport flight shall comply with instructions given by a crew member in compliance with this section. Passengers must also comply with instructions implementing exit seating restrictions, and no person may smoke while the no-smoking sign is lighted.

This converts a crew instruction into a legal obligation. When a passenger refuses to stow a bag, sit down for landing or stop smoking, the crew member is not making a request that can be negotiated — they are giving an instruction the passenger is required by law to obey. That framing matters when escalating an unruly passenger event, because it establishes at what point the passenger's behaviour became a regulatory breach rather than mere discourtesy.

Sterile flight deck

The sterile flight deck concept restricts non-essential communication and activity during critical phases of flight — normally taxi, take-off, initial climb, descent, approach and landing, below a level defined in the operator's manual.

The rule exists because the accident record contains flights lost when the flight crew were distracted at low altitude by non-essential conversation. But the corollary is equally important and equally examinable: the sterile flight deck never bars a safety call. A crew member who waits for a sterile period to end before reporting an engine fire has misunderstood the rule entirely.

Building the loop back the other way

Authority flows down; information must flow up. A flight deck that never hears from the cabin is not a well-run flight deck. Effective practice includes a pre-flight briefing in which the PIC and the SCCM agree communication protocols, the sterile period definition, the emergency briefing format and the arrangements for the sector; regular status reports; and a debrief after any occurrence. The regulation requires joint CRM training with flight crew and flight operations officers precisely so that both sides practise this loop before they need it.