(19)
(11) EP 4 772 725 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.09.2026 Bulletin 2026/36

(43) Date of publication A2:
08.07.2026 Bulletin 2026/28

(21) Application number: 25222513.1

(22) Date of filing: 11.12.2025
(51) International Patent Classification (IPC): 
F01D 25/00(2006.01)
 F01D 25/34(2006.01)
(52) Cooperative Patent Classification (CPC):
F01D 25/002; F05D 2260/607; F05D 2230/72; F01D 25/007; F01D 5/286; F01D 5/005; F01D 25/005
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
GE KH LA MA MD TN

(30) Priority: 13.12.2024 IN 202411098693
03.07.2025 US 202519259064

(71) Applicant: General Electric Company
Cincinnati, Ohio 45215 (US)

(72) Inventors:
  • SWAMINATHAN, Srinivasan
    560066 Bengaluru (IN)
  • THIMMEGOWDA, Shalini
    560066 Bengaluru (IN)
  • JHA, Sanjeev Kumar
    Evendale, 45241 (US)

(74) Representative: Openshaw & Co. 
8 Castle Street
Farnham, Surrey GU9 7HR
Farnham, Surrey GU9 7HR (GB)

   


(54) METHOD FOR WASHING GAS TURBINE ENGINES


(57) A method (200) for washing a gas turbine engine (10) includes freezing a cleaning liquid to form solid cleaning granules, compacting the solid cleaning granules to form a compacted cleaning solid (106), and inserting the compacted cleaning solid (106) into the gas turbine engine (10), wherein when the gas turbine engine (10) is started, the compacted cleaning solid (106) liquifies to form a cleaning foam, which spreads through a gas flow path (37) of the gas turbine engine (10) to clean one or more components (22, 24) of the gas turbine engine (10) along the gas flow path (37).







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