On June 12, 2010, at about 0045 Universal Coordinated Time (UTC), a Thomas Cook Airlines Boeing 757-28A, registration number G-TCBA, while cruising at FL360, experienced a fuel leak from the left engine, a Rolls-Royce RB211-535E4-37 turbofan engine. The flight crew diagnosed the fuel leak and cross-fed fuel to correct the imbalance; however, the fuel leak persisted. The captain declared a PAN call and the airplane was cleared to make an approach to Runway 26L at London Gatwick Airport, United Kingdom. The airplane made an uneventful landing and no injuries were reported. The flight was a scheduled flight from Milas-Bodrum Airport, Turkey, to London Gatwick Airport. Subsequent investigation by the operator's maintenance engineers traced the source of the fuel leak to a pipe coupling at the high pressure fuel pump outlet on the left engine. The investigation is under the jurisdiction of the government of United Kingdom. Further information pertaining to this incident may be obtained from: Air Accidents Investigation Branch Department of Environment, Transport and the Regions Berkshire Copse Road Aldershot Hants GU11 2HH United Kingdom Tel.: (44) 1252 510300 (44) 171 890 5999 (after hours) E-mail: enquiries@aaib.gov.uk Fax: (44) 1252 376999 AFTN: EGGCYLYX Telex: 858119 ACCINV G Website: http://www.dft.gov.uk This report is for informational purposes only and contains only information obtained for, or released by, the Government of United Kingdom.