Sơ đồ ghế KLM Royal Dutch Airlines Boeing 787-9

Four-tier KLM long-haul stack on the Boeing 787-9, the shorter sister of the 787-10: World Business Class (JAMCO Venture, 1-2-1 reverse-herringbone, all-aisle-access), Premium Comfort (2-3-2), Economy Comfort (extra-legroom zone within Economy) and Economy (3-3-3, 9-abreast). BUSINESS PRODUCT: KLM's 2023 release states that JAMCO Venture seats were previously installed on the 787 fleet, but the newer 777 door, bed and charging details are not transferred to this configuration. Current 787 door absence, movable divider, exact orientation and screen sizes remain unverified. LAYOUT DERIVED_FROM_COUNTS: the archived current family page provides specifications but omits interactive numbered labels. The retained row grid remains a reconstruction from the historical neutral counts and product context, not a primary numbered map. COUNTS (Wikipedia KLM fleet table, 787-9 row, as of June 2026): 13 airframes, J=30 World Business / W=21 Premium Comfort / Y+=48 Economy Comfort / Y=176 Economy = 275. The assignment's ~24 Economy Comfort / ~219 Economy (~294) hint is SUPERSEDED by this table: 48 Economy Comfort + 176 Economy = 224 in the single Economy cabin, total 275. MODELLING: business rows 1-8 in 1-2-1 (30 = 7 full rows of 4 + a final centre pair D/G at row 8, since 30 does not divide evenly into 1-2-1 rows and the cabin narrows toward the rear galley). Premium Comfort is 2-3-2, 3 full rows of 7 = 21 (rows 11-13; rows 9-10 skipped for the galley/vestibule per common KLM numbering). Economy Comfort is modelled as a ZONE within the single Economy cabin per AUTHORING §6 (seatTypeId economy-comfort, canonicalTier extra_legroom_economy, contributing the 48N token) — NOT a separate cabin: rows 15-19 full 9-abreast (45) plus a 3-seat centre triple at row 20 (D/E/F) = 48. Standard Economy is rows 21-40 (176): row 21 a bulkhead exit row at door 3 (extra legroom), rows 22-38 full 9-abreast (153), a galley-approach row 39 (9), and a 5-seat last row 40 that narrows to a port triple (A/B/C) plus a starboard aisle+window pair (G/J) ahead of the aft galley/lavatories. DERIVATIONS / UNPUBLISHED: retained door positions, wing span, skipped row numbers, partial-row narrowing, monument areas, per-seat warnings, storage/tray/bassinet restrictions and ratings are unverified historical modelling assumptions. Every retained furniture anchor is marked derived and no lavatory area represents a verified fixture count. The current family page lists six toilets and average pitches of 79/89/97 cm, but its 294 maximum conflicts with this retained 275-seat scaffold; those figures do not certify exact locations, product generation or installed pitch here. Retained numeric seat measurements and screen sizes remain estimates. windowAlignment is left 'unknown' for window seats because the grid is derived and a real window cannot be proven to line up (no 787 window grid exists, so windowGridType is omitted). AUDIT 2026-09-30: Current official specifications do not independently verify this derived row/letter scaffold. Complete configuration verification remains unresolved: dimensions, per-seat claims, furniture, exits, window alignment and operator-specific retrofit state require configuration-specific primary evidence. SOURCE CONTRADICTION: Official maximum 294 contradicts baseline Premium Comfort 275; exact cabin counts and numbered map required.