# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2020-12-10 · Effective 2021-01-14 · 85 FR 79418
## Document
- **Document number:** 2020-27007
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 85 FR 79418
- **Publication date:** 2020-12-10
- **Effective date:** 2021-01-14
- **FAA docket:** Docket No. FAA-2019-0984
## Abstract

The FAA is superseding Airworthiness Directive (AD) 2018-16- 05, which applied to certain The Boeing Company Model 757 airplanes. AD 2018-16-05 required repetitive inspections for skin cracking and shim migration at the upper link drag fittings, diagonal brace cracking, and fastener looseness; and applicable on-condition actions. This AD retains the actions required by AD 2018-16-05, reduces the compliance times for certain inspections, and adds repetitive inspections at certain fastener hole locations and applicable on-condition actions. This AD was prompted by reports of bolt rotation in the engine drag fitting joint and fastener heads; an inspection of the fastener holes revealed that cracks were found in the skin. This AD was also prompted by a report of multiple cracks in the drag fitting at fastener holes found during an inspection required by AD 2018-16-05. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2020/12/10/2020-27007/airworthiness-directives-the-boeing-company-airplanes)
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