AD/CFM56/33 - Inspection of Fan Blades with 25 Degree Mid-span Shrouds (Cth)

AIRWORTHINESS DIRECTIVE On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct an unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

CFM International Turbine Engines - CFM56 Series AD/CFM56/33 Inspection of Fan Blades with 10/2014 25 Degree Mid-span Shrouds

Applicability: This AD applies to CFM International (CFM) CFM56-3 turbofan engines, all serial numbers, when equipped with fan blades with 25 degree mid-span shrouds: Part Numbers (P/N) 9527M99P08, 9527M99P09, 9527M99P10, 9527M99P11, and 1285M39P01, or fan blade pairs P/N 335-088-901-0, 335-088-902-0, 335-088-903-0, and 335-088-904-0.

Note 1: These engines are known to be installed on, but not limited to, Boeing 737 series aeroplanes.

Note 2: The installation of fan blades with 25 degree mid-span shrouds is not allowed on the CFM56-3C engine model. Requirements: 1. INSPECTION

Perform an inspection of fan blades P/N 9527M99P08, 9527M99P09, 9527M99P10, 9527M99P11, and 1285M39P01, or fan blade pairs P/N 335‑088‑901-0, 335-088-902-0, 335‑088‑903‑0, and 335-088-904-0 in accordance with paragraphs 3.A (On-wing) or 3.B (In-shop) of CFM Service Bulletin (SB) CFM56-3/3B/3C 72-1067 original issue.