Lufthansa Airbus A319 seat map

Layout transcribed row-by-row from the Lufthansa fleet PDF 202603_A319_138.pdf (revision 2026-03), the authoritative published seat map (the only current A319 PDF in the 319/ fleet directory — probed 202603_A319_{100,110,116,120,124,126,128,130,132,134,136,140,141,142,144,145,146,150,152,156,160,168}.pdf and every non-138 filename returned 404). 23 rows of 3-3 (columns A B C | D E F); rows 13 and 17 are not used (skipped for superstition), so the seat rows are 1-12, 14-16 and 18-25 — 23 full six-abreast rows = the published 138 seats, with NO partial rows or blocked-middle reductions (the whole grid is regular). EXIT LAYOUT (read from the diagram; differs from the A320): the A319 has ONLY ONE pair of overwing emergency exits, not two. Forward entry doors (Door 1 L/R) ahead of row 1; a SINGLE Type III overwing exit each side beside row 10 (the red exit bracket sits at row 10 on both the A/B/C and D/E/F sides); aft entry doors (Door 2 L/R) behind row 25. Forward galley/stowage on the right/window (D/E/F) side + accessible lavatory on the left/window (A/B/C) side with crew seats ahead of row 1; rear complex behind row 25 = two lavatories (both window sides) + a centre-rear galley + crew seats. MODELING OF THE BUSINESS/ECONOMY SPLIT (AUTHORING.md §6): Lufthansa short-haul is a Eurocabin — a single physical 3-3 economy deck. Business Class is created on the day by a MOVABLE divider at the front of the cabin, with the adjacent middle seat kept free; its extent varies flight-by-flight with demand (the PDF legend states explicitly: "Partition between Business and Economy Class according to demand" and draws a repositionable curtain with a left-right movement arrow at the row 6/7 boundary). Because the seats are identical economy hardware and no fixed cabin boundary exists, this is modeled as ONE economy cabin (canonicalTier economy) with the Business block expressed as a demand-dependent ZONE (representative maximum rows 1-6, where the drawn partition sits) rather than a separate cabin — modeling a fixed Business cabin would invent a divider position the source says is variable. No seat is assigned a business tier, so cabinSummary carries no J token. ZONES within the one cabin (per the corpus rule that non-contiguous or location-priced tiers are zones, not separate cabins): Preferred Zone = rows 7, 8, 9, 11 (drawn dark-blue on the PDF; forward Economy sold at a surcharge; identical hardware, flagged preferred_zone, rated standard as a location premium); Extra-legroom = row 10 only (the single overwing-exit row, marked with the Lufthansa "seat with more legroom" symbol on all six seats), given a distinct seatType (canonicalTier extra_legroom_economy) so it counts as N in cabinSummary. WINDOW GRID: aircraft.windowGridType is deliberately OMITTED — no A319 engineering grid exists in data/window-grids/ (only a320ceo/a320neo/a321neo/737-* grids are present), so there is no variant-exact grid to bind and AUTHORING §9 forbids binding a different-length variant. windowAlignment is therefore left "unknown" for the window seats (A/F): the map shows seat positions, not whether a structural window lines up. DERIVATIONS / UNPUBLISHED: The Lufthansa seat-map PDF publishes row/seat identifiers, the Business/Economy demand partition, extra-legroom and Preferred-Zone seats, exits, galleys and lavatories, but NO numeric pitch or width and no amenity detail. All pitch/width/recline values are therefore unsourced estimates (marked unsourced/approximate), with the regular Economy pitch itself unpublished; the extra-legroom row is marked by symbol only (no numeric delta on this PDF). Wing extent and forward/rear monument sides are read from the diagram. Amenities (Wi-Fi, IFE) are from Lufthansa product pages, not this PDF.