SE03036CH
Application of a deep compressive stress layer using a Low Plasticity Burnishing (LPB) process on CFM56-7 Series Engines Stage 1 High Pressure Compressor (HPC) Blade Dovetails in accordance with Delta Air Lines Inc. Drawing No. 72-0396, Revision B, dated November 3, 2011, or later FAA Approved revision. Held by Delta Air Lines INC., which holds 6 approved modifications in all. Last revised December 14, 2011. System: engine.
What it applies to
- Kind of product
- Aircraft
- Design holder
- CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.; CFM International S.A.
- Models
- CFM56-7B20, CFM56-7B20/2, CFM56-7B20/3, CFM56-7B22, CFM56-7B22/2, CFM56-7B22/3, CFM56-7B22/3B1, CFM56-7B22/B1, CFM56-7B24, CFM56-7B24/2, CFM56-7B24/3, CFM56-7B24/3B1, CFM56-7B24/B1, CFM56-7B26, CFM56-7B26/2, CFM56-7B26/3, CFM56-7B26/3B1, CFM56-7B26/3B2, CFM56-7B26/3B2F, CFM56-7B26/3F, CFM56-7B26/B1, CFM56-7B26/B2, CFM56-7B27, CFM56-7B27/2, CFM56-7B27/3, CFM56-7B27/3B1, CFM56-7B27/3B3, CFM56-7B27/3F, CFM56-7B27/B1, CFM56-7B27/B3
- Type certificates
- E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN, E00055EN
- The FAA's record
- On the FAA's site
What an approved modification is
A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.
Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 22, 2026.