Airworthiness Directive · Amendment 39-19110 · Turbine section
CFM International S.A. Turbofan Engines
This AD applies to CFM International S.A. (CFM) LEAP-1A23, LEAP-1A24, LEAP-1A24E1, LEAP-1A26, LEAP-1A26E1, LEAP-1A30, LEAP-1A32, LEAP-1A33, LEAP-1A33B2 and LEAP-1A35A engines with a high-pressure turbine (HPT) stage 2 disk, with a part number (P/N) 2466M52G03 and serial number (S/N) listed in Table 1 of CFM Service Bulletin (SB) LEAP-1A SB 72-0167-01A-930A-D, Issue 001, dated September 28, 2017, installed.
We are adopting a new airworthiness directive (AD) for certain CFM International S.A. (CFM) LEAP-1A turbofan engines. This AD requires removal, inspection, rework, and re-identification of the high-pressure turbine (HPT) stage 2 disk, part number (P/N) 2466M52G03. This AD was prompted by a quality escape at the manufacturer that resulted in cracks appearing during forging of the HPT stage 2 disks. We are issuing this AD to address the unsafe condition on these products.
Prior to accumulating 1,200 engine cycles since new after the effective date of this AD, remove, inspect, rework, and re-identify the HPT stage 2 disk, P/N 2466M52G03, in accordance with the Accomplishment Instructions, paragraph 5.B.(2), in CFM SB LEAP-1A-72-00-0167-01A-930A-D, Issue 001, dated September 28, 2017.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
