{
  "url": "https://openlegislation.uk/eu-regulation-2018-1139/annex-V/division-4/division-4.4",
  "json_url": "https://openlegislation.uk/eu-regulation-2018-1139/annex-V/division-4/division-4.4.json",
  "legislation": "eur/2018/1139",
  "legislation_title": "Regulation (EU) 2018/1139 of the European Parliament and of the Council of 4 July 2018 on common rules in the field of civil aviation and establishing a European Union Aviation Safety Agency, and amending Regulations (EC) No 2111/2005, (EC) No 1008/2008, (EU) No 996/2010, (EU) No 376/2014 and Directives 2014/30/EU and 2014/53/EU of the European Parliament and of the Council, and repealing Regulations (EC) No 552/2004 and (EC) No 216/2008 of the European Parliament and of the Council and Council Regulation (EEC) No 3922/91 (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2018-1139",
  "path": "annex/V/division/4/division/4.4",
  "kind": "division",
  "number": "4.4",
  "heading": null,
  "text": "A flight must not be commenced or continued unless the aircraft's scheduled performance, considering all factors which significantly affect its performance level, allows all phases of flight to be executed within the applicable distances/areas and obstacle clearances at the planned operating mass. Performance factors which significantly affect take-off, en-route and approach/landing are, particularly:\n(a) operating procedures;\n(b) pressure altitude of the aerodrome;\n(c) weather conditions (temperature, wind, precipitation and visual range);\n(d) size, slope and condition of the take-off/landing area; and\n(e) the condition of the airframe, the power plant or the systems, taking into account possible deterioration.",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2018/1139/annex/V/division/4/division/4.4",
    "retrieved_at": "2026-11-01T14:43:59.618018+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}