Airworthiness directives › 2017-24-06
AD 2017-24-06 Airworthiness Directives; CFM International S.A. Turbofan Engines
Applicability*9
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.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
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.
Unsafe condition
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 prevent failure of the HPT stage 2 disks. The unsafe condition, if not corrected, could result in uncontained release of the HPT stage 2 disks, damage to the engine, and damage to the airplane.
Affected ADs
None.
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