Wet and Damp Leasing

Guidance and application information relating to wet and damp leasing of aircraft

Wet Leasing is defined under EU regulations as an agreement between air carriers pursuant to which the aircraft is operated under the AOC of the Lessor.

Note:   A Damp Lease is defined as a wet-leased aircraft that includes a cockpit crew but not cabin attendants.

Please note that there may be a charge associated with wet/damp leasing applications depending on how much assessment is required. See the details on Leasing Application Charges.

In the UK, wet/damp lease approvals can be considered up to a maximum of 14 months (seven months initially, with a possible extension for up to a further seven months).

Flight Time Limitation (FTL) Scheme

EU-OPS Subpart Q is not a complete scheme for FTL as it contains a number of areas that are still regulated by Member States and was not subject to scientific review. Therefore, in accordance with EU-OPS recitals and as required by Article 8(4) the CAA has notified the Commission that it will maintain CAP 371 as the basis for all UK AOC FTL schemes until such time as Community rules based on scientific knowledge and best practice are established. With regard to FTL scheme requirements for wet lease arrangements, they must be in compliance with the UK operator's approved FTL scheme.

Required Application Information

Wet or Damp Lease-in of a foreign registered aircraft – please provide an application letter detailing the following information:

  • aircraft type and model;
  • registration(s) of the aircraft;
  • name and address of the foreign operator (Lessor);
  • the period of the lease; and
  • routes to be flown.

In addition, the following documentation should accompany the application letter:

  • Copy of the lease agreement or description of the lease provisions;
  • A copy of the report on the safety assessment/audit carried out by the lessee on the foreign operator;
  • Air Operator Certificate (AOC) and/or Operating Licence and/or Certificate of Competency issued by the aeronautical authority of the State of Operator;
    (The AOC information should detail the aircraft type(s) and registration(s) to be used by the UK air carrier and the AOC areas and types of operation.)

  • Certificate of Registration issued by the aeronautical authority of the State of Registry for all the aircraft to be used on services to the UK;
  • Certificate of Airworthiness issued by the aeronautical authority of the State of Registry for all the aircraft to be used on services to the UK.  A copy of the last annual maintenance inspection report should be included to validate the certificate;
  • Noise Certificates issued by the aeronautical authority of the State of Registry for all the aircraft to be used on services to the UK.  Or a copy of a noise exemption obtained from the Regulatory Policy Group of the UK Civil Aviation Authority.  (All aircraft operating scheduled/charter  passenger/cargo services must be Chapter 3 compliant).
  • Certificate of Insurance - liability for passenger and third party risks for aircraft to be used.  The level of insurance must meet the minimum requirements of insurance for passenger and third party liability set out in Article 6 and 7 of EC Regulation No. 785/2004.
  • Enhanced Ground Proximity Warning Systems (EGPWS) – confirmation that the aircraft is fitted with a recognised Enhanced Ground Proximity Warning System (EGPWS).
  • Dangerous Goods and Munitions of War – confirmation that no dangerous goods or munitions of war will be carried (if so, provide letter of exemption issued by UK CAA Dangerous Goods Office);
  • Airborne Collision Avoidance System (ACAS II or TCAS Version 7). Confirmation that an Airborne Collision Avoidance System (ACAS II or TCAS Version 7) is fitted (if not, provide exemption statement by the airline's State aeronautical authorities);
  • UK Approach Ban requirements. A statement that the airline's crews are aware of the UK Approach Ban requirements as set out in Article 108(6) of the UK Air Navigation Order 2009, and that flight crews will be issued with written instructions with regard to Article 108(6) prior to operating the flights into the UK;
  • Aerodrome Operating Minima. A statement that the airline's flight crew's Non Precision and Category 1 Aerodrome Operating Minima comply with Article 108(3) of the Air Navigation Order 2009.

Required documentation for foreign airlines and aircraft (DfT)  

Wet Lease-out of a UK registered aircraft on behalf of a foreign operator

Article 13(2) of Council Regulation (EC) No. 1008/2008 does not require lease approval.  However, UK air carriers should inform their CAA Assigned Flight Operations Inspector of such leases, even if the operation is within the region currently authorised on their AOC.  Matters such as variations to AOC regions or the use of the foreign operator’s cabin staff must be referred to the CAA Assigned Flight Operations Inspector.

How to Contact Us

CAA Leasing Manager
Flight Operations Policy Department
United Kingdom Civil Aviation Authority
Safety Regulation Group
1W, Aviation House
Gatwick Airport South
West Sussex.  RH6 0YR

Tel  No.  +44 (0)1293 57 3422
E-mail Aircraft.Leasing@caa.co.uk