Airworthiness directives › 2017-24-08
AD 2017-24-08 Airworthiness Directives; Rolls-Royce plc Turbofan Engines
Applicability*9
This AD applies to all Rolls-Royce plc (RR) RB211-535E4-37, RB211-535E4-B-37, and RB211-535E4-C-37 turbofan engines with low-pressure (LP) fuel filter-to-high-pressure (HP) fuel pump tube assembly, part number (P/N) UL16692, AE709623-1, 163521538, or 163521545, installed; or HP fuel pump-to-fuel flow governor (FFG), P/N UL16691 or UL37214, installed; or FFG-to-HP pump inlet overspill return tube assemblies, P/N UL16690 or UL37213, installed; or flanged adaptor, P/N UL37218, installed.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Remove LP fuel filter-to-HP fuel pump tube assembly, P/N UL16692, AE709623-1, 163521538, and 163521545, and replace with a part eligible for installation, at the applicable compliance times specified in paragraphs (g)(1)(i) or (ii) of this AD, whichever occurs first, using the Accomplishment Instructions of RR Service Bulletin (SB) RB.211-73-H131, Revision 1, dated September 2, 2014. (i) At the next shop visit after the effective date of this AD, or (ii) at the later of the following: (A) Before the part exceeds 4,750 engine flight cycles (FC) or 15,000 flight hours (FH), since new, whichever occurs first, or (B) Within 400 FC or 800 FH, whichever occurs first, after the effective date of this AD. (2) For affected engines with an HP fuel pump-to-FFG tube assembly or FFG-to-HP pump inlet overspill return tube assembly, or flanged adaptor, installed, replace the parts concurrent with the actions specified in paragraph (g)(1) of this AD, if applicable, or during the next shop visit, using the Accomplishment Instructions of RR SB RB.211-73-G230, Revision 3, dated April 8, 2016.
Unsafe condition
This AD was prompted by reports of fuel leaks that have resulted in engine in-flight shutdowns. We are issuing this AD to prevent loss of fuel supply to the engine, which could lead to the in-flight shutdown of one or more engines, loss of thrust control, and damage to the airplane.
Affected ADs
This AD supersedes AD 2014-24-08, Amendment 39-18041 (79 FR 71308, December 2, 2014).
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