BS 4727:2017 pdf download – Aerospace series – Standardized passenger seat weight information
IFE shall be considered with the following baseline definition:
a) IFE monitor (if in-seat video is offered);
b) One (1) SEB;
c) Three (3) PCUs;
d) Needed in-seat cables.
4.2.2 First class (F/C) and Business class (B/C) seats
F/C and B/C seat concepts are very different and often highly customized. The definition of the calculated seat weight is up to the seat supplier. The weight information shall be based on the same fabric, seat belt and life vest information as defined for the economy class seat. The rest of the detailed design is up to the seat supplier, but a clear list of considered features and options including IFE and monitor size is to be provided by the seat supplier with the calculated seat weight.
4.3 Estimated seat weight
The estimated seat weight is the estimated seat weight empty for each seat part number (P/N) (single, double, triple, quadruple) as estimated during the pre-design phase according to the specific customer request including customer specific trim and finish and all accessories, e.g. IFE, seat actuation, reading lights, seat belts etc. (but without any life vests). In general, for a detailed weight list the component break down as listed in 4.2 can be used. The estimated weight is based on estimated weight of single parts and estimations on previous designs.
4.4 Calculated seat weight
The calculated seat weight is the calculated seat weight empty for each seat part number (P/N) (single, double, triple, quadruple) as calculated based on drawings/models released for manufacturing during the design phase according to the specific customer request including customer specific trim and finish and all accessories, e.g. IFE, seat actuation, reading lights, seat belts etc. (but without any life vests). In general, for a detailed weight list the component break down as listed in 4.2 can be used. The calculated seat weight is based on the weight of the single parts.
4.5 Actual seat weight empty
The actual seat weight empty is the weight of each seat part number (P/N) (single, double, triple, quadruple) as designed according to the specific customer request including customer specific trim and finish and all accessories, e.g. IFE, seat actuation, reading lights etc. In general, for a detailed weight list the component break down as listed in 4.2 can be used. Consider the seat as ready for aircraft installation. The weight will be finally checked during first article inspection (FAI). The seat unit will be weighed empty as delivered to the OEM fully equipped with seat belts, cushions, dress covers, IFE but without any life vest and other weight of contents for any stowage compartments or literature pockets. The actual weight empty needs to be shown in the seat delivery documentation like drawings and weight reports.
4.6 Maximum seat weight loaded
The maximum seat weight loaded is the actual seat weight empty as defined in 4.5 plus:
a) Maximum weight for content of literature pockets (magazines);
b) Maximum weight for life vests;
c) Maximum weight for content of other stowage compartment.
The maximum seat weight loaded shall be mentioned in addition to the actual seat weight empty on the
seat supplier drawings.
4.7 Certified seat weight
The certified seat weight is the maximum seat weight loaded as defined in 4.6 plus:
a) Weight for under-seat baggage of 9,1 kg (20 lb) per seat place;
b) Weight for passengers 77,0 kg (170 lb) per seat place;
c) Additional weight for any item of mass in order to cover any additional seat option with the seat certification;
The certified seat weight shall be listed in the certification documentation like static and dynamic test reports, installation instructions and limitations (IIL).
4.8 Defined seat weight
The defined seat weight is to be negotiated between the seat supplier and the purchaser. If not otherwise agreed as guideline the defined seat weight is the actual seat weight empty with a tolerance of ± 3 %.