AW139 (IBF) — Envelope & Path 2

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Advisory tool only — not a substitute for the Rotorcraft Flight Manual. Envelope: up to 6400 kg from Fig 1-1 (139G1580A021 Rev.B, IBF installed); above 6400 kg from Supp 50 Fig 1-6 (139G1580A006 Rev.D), CAT A take off/landing limitations for GW 6400–6800 kg, which gives three envelopes — In-Flight (Hd 11000 ft), Cat.A/Cat.B take-off & landing (Hd 8000 ft) and Off-Shore (Hd 5000 ft, PA ≤ 5000 ft) — with min OAT −30 °C, or −40 °C with landing gear kit 3G3200F00211 / 4G0000F00311. Path 2 check: gradients digitized from RFM Supp 50 Fig 4-103 (GW 6400 kg) and Fig 4-104 (GW 6800 kg), Take-off Flight Path 2 Gradient, MCP OEI, IBF installed, Vy 80 KIAS, 300 A. Gradient is read at 1000 ft above the take-off point — the limiting altitude for Path 2 of PC1/PC2 — and compared with the charts' Min. Gradient line (1.85 %, i.e. 150 fpm at 80 kt). Below 6400 kg the 6400 kg chart is used (conservative); between 6400 and 6800 kg values are interpolated. Always verify against the current approved RFM for your aircraft configuration.