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Airworthiness directives › 2018-17-12

AD 2018-17-12 Airworthiness Directives; General Electric Company Turbofan Engines

2018-09-24
2018-09-07
39-19366
FAA-2018-0777
Engine
—

Applicability*9

This AD applies to all GE GE90-76B, GE90-77B, GE90-85B, GE90-90B, and GE90-94B turbofan engines with full authority digital engine control (FADEC) software, version 9.3.2.4 or earlier, installed.

Compliance

Comply with this AD within the compliance times specified, unless already done.

Required actions

(1) Within 90 days after the effective date of this AD, remove FADEC software, version 9.3.2.4 or earlier, from the engine. (2) Install a FADEC software version eligible for installation.

Unsafe condition

This AD was prompted by an ice-crystal icing event that caused damage to both engines, a single engine stall, and subsequent engine shutdown. We are issuing this AD to prevent failure of the high-pressure compressor (HPC). The unsafe condition, if not addressed, could result in failure of the HPC, failure of one or more engines, loss of thrust control, and loss of the airplane.

Affected ADs

None.

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