AMC3 CAT.OP.MPA.182 Fuel or energy scheme – aerodrome selection policy - aeroplanes

CAA ORS9 Decision No. 47

Text in magenta in force from 30 October 2025

BASIC FUEL SCHEME – AERODROME FORECAST METEOROLOGICAL CONDITIONS

Table 1 — Aerodrome forecasts (TAFs) and landing forecasts (TRENDs) to be used for pre-flight planning

APPLICATION OF AERODROME FORECASTS (TAF & TREND) TO PRE-FLIGHT PLANNING

  1. APPLICATION OF INITIAL PART OF TAF

    1. Application period: From the start of the TAF validity period up to the time of applicability of the first subsequent ‘FM…*’ or ‘BECMG’, or if no ‘FM’ or ‘BECMG’ is given to the end of the validity period of the TAF.

    1. Application of forecast: The prevailing weather conditions forecast in the initial part of the TAF should be fully applied with the exception of the mean wind and gusts that should be applied in accordance with the policy in the column ‘BECMG AT and FM’ in the table below. However this may be temporarily superseded by a ‘TEMPO’ or ‘PROB**’, if applicable according to the table below.

  1. APPLICATION OF FORECAST FOLLOWING CHANGE INDICATION IN THE TAF AND TREND

TAF or TREND for AERODROME PLANNED AS: FM(alone) andBECMG AT: BECMG(alone),BECMG FM, BECMG TL, BECMG FM…TL, in case of: TEMPO(alone), TEMPO FM, TEMPO FM…TL, PROB30/40(alone) PROB TEMPO
TYPE OF CHANGE Deterioration and   improvement

Deterioration

Improvement

Deterioration

Transient / shower conditionsin connection with short- lived weather phenomena, e.g. thunderstorms, showers

Deterioration

Persistent conditionsin connection with e.g. haze, mist, fog, dust storm / sandstorm, continuous precipitation

Improvement

In any case

 Deterioration and improvement

DESTINATION at ESTIMATED TIME OF ARRIVAL (ETA) ± 1 HR

TAKE – OFF ALTERNATE at ETA ± 1 HR

DESTINATION ALTERNATE at ETA ± 1 HR

FUEL ERA at ETA ± 1 HR

Applicable from the start of change

Mean wind should be within required limits

Gusts: exceeding crosswind limits should be fully applied

Applicable from the start of the change

Mean windshould be within required limits

Gusts: exceeding crosswind limits should be fully applied

Applicable from the end of the change

Mean windshould be within required limits

Gusts: exceeding crosswind limits should be fully applied

Not applicable

 

Mean wind and gusts

exceeding required limits may be disregarded

Applicable

 

Gusts

exceeding crosswind limits should be fully applied

 Should be disregarded

Deterioration may be disregarded.

Improvement should be disregarded including mean wind and gusts.
ETOPS ERA from earliest ETA to ETA + 1 HR

Applicable from the start of change

Mean windshould be within required limits

Gusts exceeding crosswind limits should be fully applied

Applicable from the start of change

Mean windshould be within required limits

Gusts exceeding crosswind limits should be fully applied

Applicable from the end of change

Mean windshould be within required limits

Gusts exceeding crosswind limits should be fully applied

Applicable if below applicable landing minima

Mean wind should be within required limits

Gusts exceeding crosswind limits should be fully applied

Applicable if below applicable landing minima

Mean wind should be within required limits

Gusts exceeding crosswind limits should be fully applied

 Should be disregarded

Deterioration may be disregarded.

Improvement should be disregarded including mean wind and gusts.

* The space following ‘FM’ should always include a time group e.g. ‘FM1030’.

Note 1: ‘Required limits’ are those contained in the OM.

Note 2: If promulgated aerodrome forecasts do not comply with the requirements of ICAO Annex 3, operators should ensure that guidance in the application of these reports is provided.

Note 3: for the definitions of the meteorological terms used in this table, see ICAO Annex 3.