# Airworthiness Directives; Boeing Model 747 Series Airplanes
> **Rule** · Final rule. · Published 2001-11-26 · Effective 2001-12-31 · 66 FR 58918
## Document
- **Document number:** 01-29185
- **Category:** airworthiness
- **Manufacturer:** Boeing Model 747 Series
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 66 FR 58918
- **Publication date:** 2001-11-26
- **Effective date:** 2001-12-31
- **FAA docket:** Docket No. 2000-NM-350-AD
## Abstract

This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747 series airplanes, that requires an inspection of the flap drive transmission of the trailing edge flaps at positions 2 and 7 to determine if a discrepant torque brake is installed; and corrective action, if necessary. The action specified by this AD are intended to prevent damage to the flap system, adjacent systems, or structural components; or excessive skew of the trailing edge flap, which could result in flap asymmetry and consequent reduced controllability of the airplane. This action is intended to address the identified unsafe condition.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2001/11/26/01-29185/airworthiness-directives-boeing-model-747-series-airplanes)
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