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Airworthiness directives › 2017-20-14

AD 2017-20-14 Airworthiness Directives; The Boeing Company Airplanes

2017-11-16
2017-10-12
39-19071
FAA-2017-0244
Airframe
—

Models named: 737-300, -400, -500 series. Read the applicability below — it usually turns on serial or part numbers too.

Applicability*9

This AD applies to all The Boeing Company Model 737-300, -400, and -500 series airplanes, certificated in any category.

Compliance

Comply with this AD within the compliance times specified, unless already done.

Required actions

Before the accumulation of 66,000 total flight cycles, or within 12 months after the effective date of this AD, whichever occurs later: Incorporate a revision into the maintenance or inspection program, as applicable, that provides no less than the required damage tolerance rating (DTR) for each SSI listed in Boeing Document D6-82669, “Supplemental Structural Inspection Document, Models 737-300/400/500 Airplanes,” Revision October 2015. The required DTR value for each SSI is listed in Boeing Document D6-82669, “Supplemental Structural Inspection Document, Models 737-300/400/500 Airplanes,” Revision October 2015. The revision to the maintenance or inspection program must include, and must be implemented in accordance with, the procedures in Section 5.0, “Damage Tolerance Rating (DTR) System Application;” and Section 6.0, “SSI Discrepancy Reporting;” of Boeing Document D6-82669, “Supplemental Structural Inspection Document, Models 737-300/400/500 Airplanes,” Revision October 2015. Accomplishment of the revision required by this paragraph terminates the requirements of paragraph (g) of AD 2008-09-13.

Unsafe condition

This AD was prompted by a structural reevaluation conducted by the manufacturer. We have determined that supplemental inspections are required for timely detection of fatigue cracking for certain structural significant items (SSIs). We are issuing this AD to ensure the continued structural integrity of all The Boeing Company Model 737-300, -400, and -500 series airplanes.

Affected ADs

This AD affects AD 2008-09-13, Amendment 39-15494 (73 FR 24164, May 2, 2008) (“AD 2008-09-13”).

Read the original on the Federal Register →

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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1