Continuous improvement
With recent improvements like a reverse bleed system (RBS) and a more durable high-pressure turbine (HPT), we have line of sight to reduce operator maintenance burden and achieve the time on wing standards that CFM56 customers have long enjoyed.
HPT
CFM designed the HPT durability kit to extend time between shop visits and double time on wing in severe operating environments, which the company has validated with more than 17,000 cycles of dust ingestion testing to date.
LEAP-1A
- System introduced in Dec. 2024
- Delivered in all new and overhauled engines
- 1,200+ kits shipped as of Nov. 2025
LEAP-1B
- Testing on track
- Working with Boeing to introduce the system in 2026
RBS
CFM designed the reverse bleed system to reduce the need for on-wing fuel nozzle replacements by mitigating carbon build-up after engine shutdown. The system has experienced more than two million activations and continues to operate as intended.
LEAP-1A
- System introduced in April 2024
- Delivered in new and overhauled engines, and field retrofits
- Active in ~50% of fleet as of Nov. 2025
LEAP-1B
- System certified at an engine level in Nov. 2025
- Working with Boeing to introduce the system in 2026