Hebei Airlines is sending 14 CFM56-7B engines to Xiamen for performance-restoration work under a two-year agreement with ST Engineering. The contract is modest beside a major aircraft order, but it points to a larger problem in commercial aviation: airlines are keeping older narrowbody jets in service because new aircraft and replacement engines remain difficult to obtain.
By E.K.K · September 23, 2026 · News & analysis · 繁體中文
What does the agreement cover?
ST Engineering said on September 23 that its Commercial Aerospace business had secured a two-year exclusive agreement to conduct Performance Restoration Shop Visits, or PRSVs, for Hebei Airlines. Work begins this month at ST Engineering’s engine facility in Xiamen, China.
A PRSV is a heavy shop visit intended to recover performance that an engine gradually loses in service. Technicians inspect and repair core sections, replace worn parts where necessary and return the engine closer to its intended efficiency. It is more substantial than routine maintenance, but the announcement does not say that every engine will receive a complete overhaul.
Hebei Airlines said the programme covers 14 engines. A Boeing 737-800 uses two engines, so 14 engines are equivalent to seven aircraft sets. That comparison does not prove that exactly seven aircraft will be processed: airlines rotate engines between airframes, and neither company disclosed the individual engine serial numbers, schedule or contract value.
“Exclusive” needs a narrow reading
The word exclusive does not mean ST Engineering has become the sole maintenance provider for every CFM56-7B operated by Hebei Airlines. In March 2025, Lufthansa Technik announced a separate contract covering maintenance of the airline’s CFM56-7B engines at its Hamburg shop. That announcement did not disclose the term or number of engines. Read the Lufthansa Technik announcement.
Public information is therefore insufficient to determine whether the two contracts overlap. The precise formulation is that ST Engineering holds an exclusive two-year agreement for this 14-engine PRSV programme—not that it controls all engine maintenance across the airline.
Why spend money on an older engine?
The CFM56-7B powers Boeing’s 737 Next Generation family, including the 737-800. It belongs to an earlier generation than the LEAP-1B used on the 737 MAX, but “older” does not mean airlines can simply retire it. New-aircraft delivery delays, limited spare-engine supply and busy overhaul shops have forced carriers to keep mature fleets flying longer.
Reuters reported in July that demand for engine repairs remained strong and that fewer CFM56-powered aircraft were parked, despite high fuel prices. In August, it reported that delayed aircraft replacements and scarce used parts continued to push up maintenance costs. Reuters, July 16; Reuters, August 14.
That makes the Hebei contract part of a broader industry transition. ST Engineering is still servicing the large installed base of CFM56 engines in Singapore and China while building capability for the newer LEAP family. In February, it also secured a multi-year agreement to support Xiamen Airlines’ LEAP-1A engines. ST Engineering announcement, February 4.
Hebei Airlines is part of a larger group
Hebei Airlines is not a standalone private carrier. Founded in 2010 and based in Shijiazhuang, it was restructured by Xiamen Airlines in 2014 and is now its wholly owned subsidiary. Xiamen Airlines sits within the China Southern Airlines group. Hebei Airlines says it has 28 aircraft and operates around Shijiazhuang and Beijing Daxing as its two core airports. Hebei Airlines company profile.
This relationship adds context to the location of the work. ST Engineering already has a long maintenance relationship with Xiamen Airlines, while the new Hebei programme will be handled in Xiamen. It is reasonable to see the contract as a deeper entry into the maintenance supply chain surrounding the Xiamen Airlines group, but neither side has announced a group-wide strategic agreement.
The immediate story is not fleet expansion. It is fleet endurance. Fourteen engines are being restored so existing 737-800 capacity can remain dependable while the aviation industry works through shortages, long shop queues and a slow transition to newer aircraft.
Sources
ST Engineering press release supplied to Asia Horizon Review, September 23, 2026 · Lufthansa Technik, March 11, 2025 · Hebei Airlines company profile · Reuters, July 16, 2026 · Reuters, August 14, 2026.