CFM International LEAP-1B28K
CFM International LEAP-1B28K is the 28K-rated configuration of the certified LEAP-1B28 high-bypass turbofan model for the Boeing 737 MAX. EASA's Issue 09 E.115 type-certificate data lists LEAP-1B28 within the certified LEAP-1B series, while the FAA's 2026 B737 MAX-8 simulator record identifies LEAP 1B/28K as the primary engine rating. The existing two-engine Boeing 737 MAX relationship is retained; 28K remains a rating/configuration identity rather than an unsupported separate EASA type model.
Identity
- Aliases
- LEAP-1B28KLEAP 1B/28KCFM LEAP-1B28K
- Domains
- aviation
- Identity Level
- variant
- Kind
- turbofan
- Name
- CFM International LEAP-1B28K
- Status
- active
Details
- Description
- CFM International LEAP-1B28K is the 28K-rated configuration of the certified LEAP-1B28 high-bypass turbofan model for the Boeing 737 MAX. EASA's Issue 09 E.115 type-certificate data lists LEAP-1B28 within the certified LEAP-1B series, while the FAA's 2026 B737 MAX-8 simulator record identifies LEAP 1B/28K as the primary engine rating. The existing two-engine Boeing 737 MAX relationship is retained; 28K remains a rating/configuration identity rather than an unsupported separate EASA type model.
- Developers
- Family
- Manufacturers
Links
Assets & Meta
- Creation Time
- August 14, 2026 at 18:20:20 UTC
- Updated Time
- August 21, 2026 at 19:04:28 UTC
Other
- Sources
- Accessed Date
- 2026-08-14
- Note
- FAA simulator documentation records the exact LEAP 1B/28K engine rating for the Boeing 737 MAX simulator configuration.
- Publisher
- Federal Aviation Administration
- Title
- B737 MAX-8 M-07 FAA Simulator Qualification 2026
- Accessed Date
- 2026-08-14
- Note
- Boeing identifies the CFM LEAP-1B engine as the 737 MAX powerplant; no exact -28K installation relationship is asserted in this identity packet.
- Publisher
- The Boeing Company
- Title
- 737 MAX Airport Characteristics
- Accessed Date
- 2026-08-21
- Note
- EASA Issue 09 type-certificate data lists LEAP-1B28 among the certified LEAP-1B series models, establishing the certification boundary for the underlying model while the 28K label remains a thrust-rating/configuration identity.
- Publisher
- European Union Aviation Safety Agency
- Title
- EASA E.115 LEAP-1B series engines, Issue 09