AIRPORT PLANNING MANUAL 3.3. TAKEOFF FIELD LENGTHS Thetakeoff performance is based on the requirements of JAR 25, Change 14, plus amendment 25/96/1. Thetakeoff field length charts provide data about the maximum takeoff weights, for compliance with the operating regulations relating to takeoff field lengths. Data are presented according to the following associated conditions: • CF34 - 8E5 and CF34 - 8E5A1 engine models; • Takeoff Mode: 1; • ATTCS positioning: ON and OFF; • Flaps setting position: 1, 2 and 4; • Pavement conditions: dry, hard paved and level runway surface with no obstacles; • Zero wind and atmosphere according to ISA or ISA + 15 °C conditions; • Pack OFF: No engine bleed extraction for air conditioning packs was considered in the takeoff and landing charts. EFFECTIVITY: ALL Section 3 Page 3-7 Oct 31/12 w-apm1346