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Airworthiness Directive 2010-01-05

recurring
Official AD 2010-01-05 · FR doc E9-31043 · 2010-01-14 · turbine engine

Airworthiness Directives; CFM International, S.A. CFM56-7B Series Turbofan Engines

What this AD requires

The FAA is adopting a new airworthiness directive (AD) for CFM International, S.A. CFM56-7B series turbofan engines. This AD requires initial and repetitive eddy current inspections (ECIs) of certain part number (P/N) low-pressure (LP) turbine rear frames. This AD results from a refined life analysis by the engine manufacturer that shows the need to identify an initial and repetitive inspection threshold for inspecting certain LP turbine rear frames. We are issuing this AD to prevent failure of the LP turbine rear frame from low-cycle-fatigue cracks. Failure of the LP turbine rear frame could result in engine separation from the airplane, possibly leading to loss of control of the airplane.

Repetitive inspection. Re-inspect. The next-due date/hours depend on this aircraft’s time in service — a records report computes it from the logbooks.

Which aircraft AD 2010-01-05 applies to

MakesCfm International
ModelsCFM56-7B20, CFM56-7B22, CFM56-7B24, CFM56-7B26, CFM56-7B27, CFM56-7B22/B1, CFM56-7B24/B1, CFM56-7B27/B1, CFM56-7B26/B1, CFM56-7B20/3, CFM56-7B22/3, CFM56-7B24/3, CFM56-7B26/3, CFM56-7B27/3, CFM56-7B22/3B1, CFM56-7B24/3B1, CFM56-7B27/3B1, CFM56-7B26/3B1, CFM56-7B26/3F, CFM56-7B27/B3, CFM56-7B27/3F, CFM56-7B27/3B1F, CFM56-7B27/3B3, CFM56-7B20/2, CFM56-7B22/2, CFM56-7B24/2, CFM56-7B26/2, CFM56-7B27/2, CFM56
Part-conditional — 340-166-254-0, 340-166-255-0, 340-166-256-0, 340-166-257-0, 340-166-258-0, 340-166-259-0, 340-177-551-0, 340-177-552-0.

Applies only when the engine is assembled with one of the listed low-pressure (LP) turbine rear frame part numbers: group (1) engines with P/N 340-166-254-0 through -259-0, or group (2) engines with a dual annular combustor and LP turbine rear frame P/N 340-177-551-0 through -556-0. Installed on, but not limited to, Boeing 737-600/700/800/900 series airplanes.

Whether AD 2010-01-05 actually applies to your aircraft (by serial and installed parts) and whether it’s already complied with comes from that aircraft’s records.

How AD compliance is recorded

A valid compliance record (14 CFR 43.9) states:

Method of compliance — The specific action taken (inspected, replaced, modified) and to what revision.
Date — When the work was done.
Aircraft time — Total time in service / tach at compliance — how recurring next-due is computed.
Signature & certificate — The A&P/IA who returned it to service, with certificate number.
Is AD 2010-01-05 complied with on your aircraft?

Tailplate reads a tail number’s logbooks and matches every applicable AD — including this one — to its compliance evidence, with recurring next-due dates computed.

Look up a tail number →Read the full directive (Federal Register)

Applicability is derived from the FAA directive corpus and is advisory, not a legal airworthiness determination. Compliance is established only from an aircraft’s actual records.