Airworthiness directives › 2021-05-20
AD 2021-05-20 Airworthiness Directives; Airbus SAS Airplanes
Models named: A318-111, -112, A319-111, -113, -114, -115, A320-211, -212, -214, -216. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to all the Airbus SAS airplanes identified in paragraphs (c)(1) through (4) of this AD, certificated in any category. (1) Model A318-111 and -112 airplanes. (2) Model A319-111, -112, -113, -114, and -115 airplanes. (3) Model A320-211, -212, -214, and -216 airplanes. (4) Model A321-111, -112, -211, -212, and -213 airplanes.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
For the purposes of this AD, the production quality deficiency is defined as a “dull” finish, which is caused by surface finish pitting, and is an aggravating factor to crack initiation from vibration dynamic effect when compared with the “bright” surface finish.
Unsafe condition
This AD was prompted by a report of a production quality deficiency on the inner retainer installed on link assemblies of the aft engine mount, which could result in failure of the retainer. The FAA is issuing this AD to address non-conforming retainers of the aft engine mount. This condition could result in loss of the locking feature of the nuts of the inner and outer pins; loss of the pins will result in the aft mount engine link no longer being secured to the aft engine mount, possibly resulting in damage to the airplane.
Affected ADs
(1) This AD replaces AD 2018-16-02, Amendment 39-19342 (83 FR 39326, August 9, 2018) (AD 2018-16-02). (2) This AD affects AD 2016-14-09, Amendment 39-18590 (81 FR 44989, July 12, 2016) (AD 2016-14-09). (3) This AD affects AD 2017-04-10, Amendment 39-18805 (82 FR 11791, February 27, 2017) (AD 2017-04-10).
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