For a destination aerodrome at the estimated time of arrival, how should mean wind and gusts be treated when a TAF indicates a change with 'BECMG AT'?

For a destination aerodrome at ETA ± 1 hour, when a TAF indicates a change with 'BECMG AT', the forecast is applicable from the start of the change. Mean wind should be within required limits, and gusts exceeding crosswind limits should be fully applied.

When planning for a take-off alternate, how are 'TEMPO' groups in a TAF or TREND applied regarding wind and gusts?

For a take-off alternate at ETA ± 1 hour, 'TEMPO' groups (alone, TEMPO FM, TEMPO FM... TL, PROB 30/40) are not applicable. Mean wind and gusts exceeding required limits may be disregarded.

For a destination alternate, how should a 'PROB TEMPO' group in a TAF or TREND be treated?

For a destination alternate at ETA ± 1 hour, a 'PROB TEMPO' group should be disregarded. Deterioration may be disregarded, and improvement should be disregarded including mean wind and gusts.

For an ETOPS en-route alternate, how are 'BECMG (alone)' groups applied when they indicate deterioration?

For an ETOPS en-route alternate from earliest ETA to ETA + 1 hour, 'BECMG (alone)' groups indicating deterioration are applicable from the end of the change. Mean wind should be within required limits, and gusts exceeding crosswind limits should be fully applied.

When a TAF for a destination alternate includes a 'TEMPO' group for persistent conditions like fog, how should it be applied?

For a destination alternate at ETA ± 1 hour, a 'TEMPO' group for persistent conditions (e.g., fog) is applicable. Mean wind should be within required limits, and gusts exceeding crosswind limits should be fully applied.

For a destination aerodrome, how are 'BECMG (alone)' groups indicating improvement applied?

For a destination aerodrome at ETA ± 1 hour, 'BECMG (alone)' groups indicating improvement are applicable from the end of the change. Mean wind should be within required limits, and gusts exceeding crosswind limits should be fully applied.

For a take-off alternate, how are 'FM... (alone)' groups applied?

For a take-off alternate at ETA ± 1 hour, 'FM... (alone)' groups are applicable from the start of the change. Mean wind should be within required limits, and gusts exceeding crosswind limits should be fully applied.

For an ETOPS en-route alternate, how are 'TEMPO' groups applied when they indicate conditions below landing minima?

For an ETOPS en-route alternate from earliest ETA to ETA + 1 hour, 'TEMPO' groups are applicable if below applicable landing minima. Mean wind should be within required limits, and gusts exceeding crosswind limits should be fully applied.

For a destination aerodrome, how are 'PROB TEMPO' groups applied?

For a destination aerodrome at ETA ± 1 hour, 'PROB TEMPO' groups should be disregarded. Deterioration may be disregarded, and improvement should be disregarded including mean wind and gusts.

For a destination alternate, how are 'BECMG AT' groups applied?

For a destination alternate at ETA ± 1 hour, 'BECMG AT' groups are applicable from the start of the change. Mean wind should be within required limits, and gusts exceeding crosswind limits should be fully applied.

For an ETOPS en-route alternate, how are 'BECMG (alone)' groups indicating improvement applied?

For an ETOPS en-route alternate from earliest ETA to ETA + 1 hour, 'BECMG (alone)' groups indicating improvement are applicable from the end of the change. Mean wind should be within required limits, and gusts exceeding crosswind limits should be fully applied.

For a take-off alternate, how are 'BECMG (alone)' groups indicating deterioration applied?

For a take-off alternate at ETA ± 1 hour, 'BECMG (alone)' groups indicating deterioration are applicable from the end of the change. Mean wind should be within required limits, and gusts exceeding crosswind limits should be fully applied.

For a destination aerodrome, how are 'TEMPO' groups for transient conditions like thunderstorms applied?

For a destination aerodrome at ETA ± 1 hour, 'TEMPO' groups for transient conditions (e.g., thunderstorms) are applicable. Mean wind should be within required limits, and gusts exceeding crosswind limits should be fully applied.

For an ETOPS en-route alternate, how are 'PROB TEMPO' groups applied?

For an ETOPS en-route alternate from earliest ETA to ETA + 1 hour, 'PROB TEMPO' groups should be disregarded. Deterioration may be disregarded, and improvement should be disregarded including mean wind and gusts.

For a destination alternate, how are 'BECMG (alone)' groups indicating improvement applied?

For a destination alternate at ETA ± 1 hour, 'BECMG (alone)' groups indicating improvement are applicable from the end of the change. Mean wind should be within required limits, and gusts exceeding crosswind limits should be fully applied.

For a take-off alternate, how are 'BECMG (alone)' groups indicating improvement applied?

For a take-off alternate at ETA ± 1 hour, 'BECMG (alone)' groups indicating improvement are applicable from the end of the change. Mean wind should be within required limits, and gusts exceeding crosswind limits should be fully applied.

For a destination aerodrome, how are 'BECMG (alone)' groups indicating deterioration applied?

For a destination aerodrome at ETA ± 1 hour, 'BECMG (alone)' groups indicating deterioration are applicable from the end of the change. Mean wind should be within required limits, and gusts exceeding crosswind limits should be fully applied.

For an ETOPS en-route alternate, how are 'FM... (alone)' groups applied?

For an ETOPS en-route alternate from earliest ETA to ETA + 1 hour, 'FM... (alone)' groups are applicable from the start of the change. Mean wind should be within required limits, and gusts exceeding crosswind limits should be fully applied.

For a destination alternate, how are 'TEMPO' groups for transient conditions like showers applied?

For a destination alternate at ETA ± 1 hour, 'TEMPO' groups for transient conditions (e.g., showers) are applicable. Mean wind should be within required limits, and gusts exceeding crosswind limits should be fully applied.

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

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AMC3 CAT.OP.MPA.182 Fuel/energy scheme — aerodrome selection policy — aeroplanes

ED Decision 2022/005/R

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 AND TREND) TO PRE-FLIGHT PLANNING
(a) APPLICATION OF INITIAL PART OF TAF (1) Application period: from the start of the TAF validity period 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. (2) Application of forecast:* the forecast of the prevailing weather conditions in the initial part of the TAF should be fully applied, with the exception of mean wind and gusts that should be applied in accordance with the policy under 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.
(b) APPLICATION OF FORECAST FOLLOWING CHANGE INDICATION IN THE TAF AND TREND
TAF or TREND for AERODROME PLANNED AS:	FM… (alone) and BECMG AT:	BECMG (alone), BECMG FM, BECMG TL, BECMG FM… TL, in case of:		TEMPO (alone), TEMPO FM, TEMPO FM… TL, PROB 30/40 (alone)			PROB TEMPO
	Deterioration and improvement	Deterioration	Improvement	Deterioration		Improvement	Deterioration and improvement
				Transient/shower conditions in connection with short‑lived weather phenomena, e.g. thunderstorms, showers	Persistent conditions in connection with e.g. haze, mist, fog, dust storm/sandstorm, continuous precipitations	In any case
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 change Mean wind should be within required limits Gusts exceeding crosswind limits should be fully applied	Applicable from the end of change Mean wind should 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	Should be disregarded	Deterioration may be disregarded. Improvement should be disregarded including mean wind and gusts.
					Mean wind should be within required limits
					Gusts exceeding crosswind limits should be fully applied

ETOPS ERA From earliest ETA to ETA + 1 HR	Applicable from the start of change	Applicable from the start of change	Applicable from the end of change	Applicable if below applicable landing minima	Applicable if below applicable landing minima
	Mean wind should be within required limits	Mean wind should be within required limits	Mean wind should be within required limits	Mean wind should be within required limits	Mean wind should be within required limits
	Gusts exceeding crosswind limits should be fully applied	Gusts exceeding crosswind limits should be fully applied	Gusts exceeding crosswind limits should be fully applied	Gusts exceeding crosswind limits should be fully applied	Gusts exceeding crosswind limits should be fully applied
* 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 provisions of ICAO Annex 3, operators should ensure that guidance on the application of these reports is provided. Note 3: for the definitions of the meteorological terms used in this table, see ICAO Annex 3.

Details

Source-Title: AMC3 CAT.OP.MPA.182 Fuel/energy scheme -- aerodrome selection policy -- aeroplanes View latest amendments

Erulesid: ERULES-1963177438-19404 Compare versions

Domain: Air operations

Applicabilitydate: 30 October, 2022

Entryintoforcedate: 26 March, 2022

Regulatorysource: ED Decision 2022/005/R Navigate

Regulatorysubject: Part-CAT

Typeofcontent: AMC to IR (Acceptable means of compliance to implementing rule)

Parentir: CAT.OP.MPA.182 Fuel/energy scheme - aerodrome selection policy - aeroplanes

Origin: EASA

Category: EAR