Shannon Engine Support

Shannon Engine Support (SES) is a specialised asset management firm that manages the world's largest lease pool of CFM International aero engines. Operating as a critical liquidity provider within the narrowbody engine market, the company provides spare engine support to facilitate uninterrupted airline operations during scheduled maintenance or unplanned engine removals. Its primary function is to bridge the gap between engine repair cycles and active flight schedules for operators of short-to-medium haul aircraft. The organisation is a 50/50 joint venture between Safran Aircraft Engines and GE Aerospace, the two constituent partners of the CFM International consortium. Its portfolio is dedicated to the CFM56 and LEAP engine families, serving a global customer base that includes major flag carriers, low-cost airlines, and independent maintenance, repair, and overhaul (MRO) providers. Through its shareholders, the company maintains direct links to the original equipment manufacturer production lines and global technical support networks. Prospective partners should verify the specific engine variants available within the current lease pool, particularly regarding the transition from CFM56-7B/5B models to the newer LEAP-1A and LEAP-1B units. Technical due diligence should focus on engine life-limited part (LLP) status, maintenance release documentation, and the geographical positioning of spare units relative to the operator's main hubs. Contractual reviews should confirm the scope of supplemental cooling or preservation requirements during extended lease terms.