Airworthiness Directive 2018-20-22
one-timeAirworthiness Directives; General Electric Company Turbofan Engines
What this AD requires
We are adopting a new airworthiness directive (AD) for all General Electric Company (GE) GE90-110B1, GE90-113B, and GE90-115B turbofan engines with a certain case combustor assembly (combustion case) installed. This AD requires removal of affected combustion cases from service and their replacement with a part eligible for installation. This AD was prompted by the discovery of a quality escape at a manufacturing facility involving unapproved welds on combustion cases. We are issuing this AD to address the unsafe condition on these products.
Which aircraft AD 2018-20-22 applies to
Applies only to engines with a combustion case P/N 2063M37G01 or 2082M19G04 installed, with a combustion case serial number listed in GE SB 72-0788 Rev 4 (dated July 30, 2018), GE SB 72-0793 R00 (dated August 10, 2018), or GE SB 72-0784 R00 (dated May 4, 2018) (specific serial numbers not included in provided applicability text).
Whether AD 2018-20-22 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.
How AD compliance is recorded
A valid compliance record (14 CFR 43.9) states:
Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.
Look up a tail number →Read the full directive (Federal Register)Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.