Power by the hour (PBH) agreements are increasingly getting airborne, heralding a radical shift in the aviation economics, but requires a new approach to ensure smooth touchdown as carriers seek predictability and scalability amid geographic expansion and digital transformation.The idea -- conceptualised in 1962 by Sir Frank Whittle and later developed commercially by Rolls-Royce Holdings in the early 1960s -- has made the sector gravitate towards performance oriented partnerships, shifting a sizeable chunk of technical and reliability risks from airlines to manufacturers or maintenance providers.A key pillar of modern fleet management, PBH – which has evolved from a cost-control model into a strategic operational tool -- holds good; more today, especially in view of the reported aircraft shortages and its appurtenant issues and costs associated.These agreements, especially due to its inherent predictive maintenance schedule, have the potential to greatly mitigate the present shortage of planes by reducing grounding time (AOG) and costs as well as reshape the airlines' management of cash flow and asset reliability.With deliveries getting delayed, PBH – which is now growing strongly in low-cost carriers and business jets — can meaningfully ease today’s aircraft shortages by keeping more existing aircraft flying and also lowering the financial pressure on airlines.The delayed deliveries from Boeing and Airbus have already led to airlines face multitude of problems, including higher operating costs and longer delays in their expansion plans; while for the passengers, they are high fares, cancellation/delays, and constrained travel options."PBH is not a panacea; but it has the ability to mitigate much of the present risks associated with the aviation industry," an analyst dealing with the sector said, adding the integration of AI (artificial intelligence) enhance failure prediction, optimise part replacement cycles and reduce unscheduled downtime.PBH is service-based contractual model in which airlines pay a fixed fee per flight hour for engine or component support, rather than purchasing spare parts and maintenance services separately.However, the latest trends suggest that PBH is moving from engine-only coverage towards “nose-to-tail” holistic maintenance, including airframes, avionics, landing gear, and components under unified hourly tariffs.Qatar Airways had secured multiple high-value PBH and Rate-Per-Flight-Hour support agreements with engine manufacturers, notably GE Aerospace and CFM International, to ensure predictable maintenance costs and high operational efficiency for its fleet.Various reports suggest that at least four PBH agreements have been signed so far this year.Independent aircraft component parts, repair and supply chain solutions provider, AJW Group, recently signed a new PBH and Main Base Kit (MBK) support pact with new Vietnam-based Sun PhuQuoc Airways.Under the terms of the agreement, AJW Group will provide comprehensive support for the airline’s current fleet of six aircraft, comprising two A321ceos and four A321neos.Ryanair and CFM International had signed a memorandum of understanding for a long-term, multi-billion-dollar material services agreement supporting nearly 2,000 CFM56 and LEAP engines on its Boeing 737 fleet.Falcon Aviation Services secured a PBH component support contract for two DHC-8 Q300 aircraft with Fokker Services Group (FSG), utilising FSG’s Abacus program for repairs.Early this year, Air Astana and FlyArystan/AJW Group witnessed a long-term PBH component support contract signed for a mixed fleet of 56 Airbus A320/A321 ceo and neo aircrafts.The rise in global air traffic serves as a major catalyst for the PBH market. According to data of the International Air Transport Association (IATA), passenger numbers rose by 3.7% to 9.8bn in 2025.According to reports, the global PBH market continues growing strongly, with market value projected to expand from around $26bn–$28bn in 2025/26 to more than $36bn by 2030 at compound annual growth rate of about 6–7%.Factoring in the contractual rigidity (of as much as 15 years) and potential cost premiums associated with PBH, experts have however called for careful financial modeling and legal diligence.Given that the PBH market is expected to maintain its growth altitude, underpinned by digital innovation, expanding aviation activity, and evolving maintenance strategies; industry demands more flexible and performance-driven hybrid models, in view of the market volatility and post-Covid operational realities.