How should the 12-month validity period for aerodrome knowledge be counted under AMC1 ORO.FC.105(c)?

The 12-month period of validity of the aerodrome knowledge should be counted from the last day of the month when the initial familiarisation training was undertaken, or from the last day of the month of the latest operation on the route or area to be flown and of the aerodromes, facilities and procedures to be used.

What are the possible starting points for counting the 36-month validity period of route or area knowledge or diversion location knowledge?

The 36-month period of validity of the route or area knowledge or diversion location knowledge should be counted from the last day of the month when: (1) the initial familiarisation training was undertaken; (2) the latest operation on the route or area was flown; or (3) the latest operation involving a diversion location was flown.

For aerodrome knowledge recency, which month's last day is used if a pilot has not flown to a particular aerodrome recently but completed initial familiarisation training?

The 12-month period of validity of the aerodrome knowledge should be counted from the last day of the month when the initial familiarisation training was undertaken, if that is the most recent qualifying event.

If a pilot last operated on a route 20 months ago and last flew to a diversion location 30 months ago, are both the route/area knowledge and diversion location knowledge still valid under AMC1 ORO.FC.105(c)?

Yes, both are still valid because the 36-month period of validity for route or area knowledge and diversion location knowledge is counted from the last day of the month of the latest operation on the route or area, and from the last day of the month of the latest operation involving a diversion location, respectively. Since 20 and 30 months are both within 36 months, they remain valid.

Under AMC1 ORO.FC.105(c), what is the maximum validity period for aerodrome knowledge and what event starts the count?

The maximum validity period for aerodrome knowledge is 12 months, counted from the last day of the month of either the initial familiarisation training or the latest operation on the route/area and aerodromes, facilities, and procedures to be used.

A pilot completed initial familiarisation training for a route on 15 March 2025. If the pilot does not fly that route again, until when is the route knowledge considered valid?

The route knowledge is valid for 36 months from the last day of March 2025, i.e., until 31 March 2028, because the 36-month period is counted from the last day of the month when the initial familiarisation training was undertaken.

What is the difference in validity periods between aerodrome knowledge and route/area or diversion location knowledge as per AMC1 ORO.FC.105(c)?

Aerodrome knowledge has a 12-month validity period, while route or area knowledge and diversion location knowledge have a 36-month validity period.

If a pilot operates on a route on 10 April 2026, and the aerodrome knowledge was last refreshed by initial training on 20 January 2026, which event determines the start of the 12-month aerodrome knowledge validity?

The latest operation on the route (10 April 2026) determines the start of the 12-month aerodrome knowledge validity, because the period is counted from the last day of the month of the latest operation on the route or area to be flown and of the aerodromes, facilities and procedures to be used.

Does AMC1 ORO.FC.105(c) specify a validity period for diversion location knowledge? If so, what is it?

Yes, the 36-month period of validity applies to diversion location knowledge, counted from the last day of the month when the latest operation involving a diversion location was flown.

A pilot's last operation involving a diversion location was on 5 July 2023. Under AMC1 ORO.FC.105(c), until when is the diversion location knowledge valid?

The diversion location knowledge is valid for 36 months from the last day of July 2023, i.e., until 31 July 2026, because the period is counted from the last day of the month when the latest operation involving a diversion location was flown.

AMC1 ORO.FC.105(c) Designation as pilot-in-command/commander

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AMC1 ORO.FC.105(c) Designation as pilot-in-command/commander

ED Decision 2025/010/R

ROUTE/AREA AND AERODROME OR DIVERSION LOCATION KNOWLEDGE RECENCY

(a) The 12-month period of validity of the aerodrome knowledge should be counted from the last day of the month:

(1) when the initial familiarisation training was undertaken; or

(2) of the latest operation on the route or area to be flown and of the aerodromes, facilities and procedures to be used.

(b) The 36-month period of validity of the route or area knowledge or diversion location knowledge should be counted from the last day of the month:

(1) when the initial familiarisation training was undertaken;

(2) when the latest operation on the route or area was flown; or

(3) when the latest operation involving a diversion location was flown.

Details

Source-Title: AMC1 ORO.FC.105(c) Designation as pilot-in-command/commander View latest amendments

Erulesid: ERULES-1963177438-12134 Compare versions

Domain: Air operations

Applicabilitydate: 9 July, 2025

Entryintoforcedate: 9 July, 2025

Regulatorysource: ED Decision 2025/010/R Navigate

Regulatorysubject: Part-ORO

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

Parentir: ORO.FC.105 Designation as pilot-in-command/commander

Origin: EASA

Category: EAR