# Proposed AD 2000-NM-350-AD: Boeing Model 747 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2001-23-13
- Products: Boeing
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 14, 2001, 66 FR 24304
- Comments due: June 28, 2001
- Became: [AD 2001-23-13](https://openairdocs.org/ad/2001-23-13)
- Docket: 2000-NM-350-AD
- FR document: 01-12008
- Official PDF: https://openairdocs.org/files/sha256/f2/10/f210cec85f8d01fb222f357f6acc006407ef63c7c1f0a8419ba58f5cf52108a3 (from https://www.govinfo.gov/content/pkg/FR-2001-05-14/pdf/01-12008.pdf)
- Federal Register: https://www.federalregister.gov/documents/2001/05/14/01-12008/airworthiness-directives-boeing-model-747-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BA1C46594A881A7A86256A5C005D1FFC.0001
- Page: https://openairdocs.org/proposed/2000-NM-350-AD

## Summary

This document proposes the adoption of a new airworthiness directive (AD) that is applicable to certain Boeing Model 747 series airplanes. This proposal would require an inspection of the flap drive transmission of the trailing edge flaps at positions 2 and 7 to determine if a wound-spring torque brake is installed, and corrective action, if necessary. This action is necessary 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.

## Notices in this docket

- May 14, 2001: Notice of proposed rulemaking (NPRM). (first notice), FR document 01-12008, comments due Jun 28, 2001 (https://www.federalregister.gov/documents/2001/05/14/01-12008/airworthiness-directives-boeing-model-747-series-airplanes)

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