Det är inte helt lätt att veta och inte riktigt samma på en narrowbody heller då man pratar om överblickbarhet "direct view requirements".
Man får hoppas att cabin-crew vet vad som gäller för respektive flygplanstyp (typcertifiering), EASAs subpart CC nedan.
AMC1 ORO.CC.100 Number and composition of cabin crew
DETERMINATION OF THE NUMBER AND COMPOSITION OF CABIN CREW
(a) When determining the minimum number of cabin crew required to operate aircraft engaged in CAT operations, factors to be taken into account should include:
(1) the number of doors/exits;
(2) the type(s) of doors/exits and the associated assisting evacuation means;
(3) the location of doors/exits in relation to cabin crew stations and the cabin layout;
(4) the location of cabin crew stations taking into account direct view requirements and cabin crew duties in an emergency evacuation including:
(i) opening floor level doors/exits and initiating stair or slide deployment;
(ii) assisting passengers to pass through doors/exits; and
(iii) directing passengers away from inoperative doors/exits, crowd control and passenger flow management;
(5) actions required to be performed by cabin crew in ditching, including the deployment of slide-rafts and the launching of life-rafts;
(6) additional actions required to be performed by cabin crew members when responsible for a pair of doors/exits; and
(7) the type and duration of the flight to be operated.
(b) When scheduling cabin crew for a flight, the operator should establish procedures that take account of the experience of each cabin crew member. The procedures should specify that the required cabin crew includes some cabin crew members who have at least 3 months experience as an operating cabin crew member.
GM1 ORO.CC.100 Number and composition of cabin crew
MINIMUM NUMBER OF CABIN CREW
(a) When determining the minimum required cabin crew for its specific aircraft cabin configuration, the operator should:
(1) request information regarding the minimum number of cabin crew established by the aircraft type certificate (TC) holder or other design organisation responsible for showing compliance with the evacuation requirements of the applicable Certification Specifications; and
(2) take into account the factors specified in AMC1 ORO.CC.100, as applicable.
(b) The number of cabin crew referred to in ORO.CC.100 (b)(1) means either:
(1) the number of cabin crew who actively participated in the aircraft cabin during the relevant emergency evacuation demonstration, or who were assumed to have taken part in the relevant analysis, carried out by the aircraft TC holder when demonstrating
AMC/GM TO ANNEX III (PART-ORO)
SUBPART CC — CABIN CREW
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the maximum passenger seating capacity (MPSC) of the aircraft type at the time of initial type certification; or
(2) a lower number of cabin crew who actively participated in a subsequent emergency evacuation demonstration, or who were assumed to have taken part in the relevant analysis, and for which approval has been obtained for a cabin configuration other than the MPSC, either by the TC holder or by another design organisation. The operator should obtain a clear indication of that number which is specified in the related documentation. If a lower number is not specified, the number of cabin crew established at the time of initial type certification applies.