Airworthiness directives › 2018-18-14
AD 2018-18-14 Airworthiness Directives; Rolls-Royce Deutschland Ltd & Co KG Turbofan Engines
Applicability*9
This AD applies to: (1) Rolls-Royce Deutschland Ltd & Co KG (RRD) BR700-710A2-20 turbofan engines with any electronic engine controller (EEC) firebox assembly installed, with any of the following component part numbers (P/Ns): FW42888, FW42886, FW38590, FW38591, or FW58255. (2) RRD BR700-710C4-11 turbofan engines with any EEC firebox assembly installed, with any of the following component P/Ns: FW38504, FW38503, FW38590, FW38591, or FW58255.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Within 28 months after the effective date of this AD, perform the following: (i) For RRD BR700-710A2-20 engines, remove from service the EEC firebox assembly components with P/N FW42888, FW42886, FW38590, FW38591, and FW58255, and replace with parts eligible for installation. (ii) For RRD BR700-710C4-11 engines, remove from service the EEC firebox assembly components with P/N FW38504, FW38503, FW38590, FW38591, and FW58255, and replace with parts eligible for installation. (2) Reserved.
Unsafe condition
This AD was prompted by reports of deterioration of the intumescent heat resistant paint system on the EEC firebox assembly that was found to be beyond acceptable limits. We are issuing this AD to prevent failure of the EEC. The unsafe condition, if not addressed, could result in failure of the EEC, loss of engine thrust control, and reduced control of the airplane.
Affected ADs
None.
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