# Airworthiness Directives; The Boeing Company Airplanes
> **Rule** · Final rule. · Published 2022-11-30 · Effective 2023-01-04 · 87 FR 73456
## Document
- **Document number:** 2022-26082
- **Category:** airworthiness
- **Manufacturer:** The Boeing Company
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 87 FR 73456
- **Publication date:** 2022-11-30
- **Effective date:** 2023-01-04
- **FAA docket:** Docket No. FAA-2022-1059
## Abstract

The FAA is adopting a new airworthiness directive (AD) for all The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SR, and 747SP series airplanes. This AD was prompted by reports that high temperature composite trim air diffuser ducts (TADD) showed composite degradation and signs of hot air leakage. This AD requires a one-time low frequency eddy current (LFEC) inspection of certain center tank upper skin panels on the right and left side for any structural damage due to heat exposure, and repair if necessary. The FAA is issuing this AD to address the unsafe condition on these products.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2022/11/30/2022-26082/airworthiness-directives-the-boeing-company-airplanes)
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