AD 2021-02-07

(1) Within 500 flight cycles (FCs) after the effective date of this AD, perform a visual inspection of the cushioned loop clamp (p-clamp), significant item number (SIN) 34282, to verify the p-clamp is undamaged and installed.

(i) Thereafter, perform the visual inspection required by (g)(1) of this AD at intervals not to exceed 500 FCs since the last inspection.

(ii) [Reserved]

(2) If, during any visual inspection required by paragraphs (g)(1) or (g)(1)(i) of this AD, the p-clamp (SIN 34282) is outside of the limits in paragraph 3.B.(4) of GE GEnx-1B Service Bulletin (SB) 73-0080 R01, dated August 29, 2019, or if the p-clamp (SIN 34282) is missing, perform a spot fluorescent penetrant inspection of the outer fuel manifold, part number (P/N) 2403M46G01, SIN 34302, using Accomplishment Instructions, paragraph 3.B.(4)(b), of GE GEnx-1B SB 73-0080 R01, dated August 29, 2019.

(i) If a crack or a sign of fuel leakage is found, before further flight, remove the outer fuel manifold, P/N 2403M46G01, SIN 34302, from service and replace with a part eligible for installation.

(ii) [Reserved]

(3) Within 500 FCs after the effective date of this AD, and thereafter at intervals not to exceed 500 FCs from the last p-clamp replacement, replace the p-clamp (SIN 34282) with a new p-clamp (SIN 34282). Complete this required action after performing the visual inspections required by paragraphs (g)(1) and (g)(1)(i) of this AD.

For the purpose of this AD, a p-clamp is a clamp, P/N J1432P12, with SIN 34282, located at the signal fuel tube hose, SIN 34200, as shown in Accomplishment Instructions, paragraph 3, Figure 1, “Outer Fuel Manifold and Clamp Location,” of GE GEnx-1B SB 73-0080 R01, dated August 29, 2019.

Sending a removed outer fuel manifold for repair, as set forth in the Accomplishment Instructions, paragraph 3.B.(4)(b), of GE GEnx-1B SB 73-0080 R01, dated August 29, 2019, is not required by this AD.