Airworthiness directives › 2020-12-03
AD 2020-12-03 Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG (Type Certificate Previously Held by Rolls-Royce plc) Turbofan Engines
Applicability*9
This AD applies to all Rolls-Royce Deutschland Ltd. & Co KG (Type Certificate previously held by Rolls-Royce plc) Trent XWB-97 model turbofan engines.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 365 days after the effective date of this AD, update the electronic engine control (EEC) software with EEC software that is eligible for installation.
Unsafe condition
This AD was prompted by the manufacturer's finding that a P30 (air pressure) sense line could become partially blocked with a mixture of ice and water, which would cause a time-lag in the P30 signal, interfering with the fuel flow limit calculations. The FAA is issuing this AD to prevent interference with the fuel flow limit calculations within the engine control system. The unsafe condition, if not addressed, could result in loss of thrust control and reduced control of the airplane.
Affected ADs
None.
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