# Proposed AD FAA-2006-23889: Airbus Model A318, A319, A320, and A321 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2006-16-14
- Products: Airbus
- Product type: Aircraft
- Action: Supplemental notice of proposed rulemaking (NPRM); reopening of comment period.
- Published: May 18, 2006, 71 FR 28825
- Comments due: June 12, 2006
- Became: [AD 2006-16-14](https://openairdocs.org/ad/2006-16-14)
- Docket: FAA-2006-23889 (https://www.regulations.gov/docket/FAA-2006-23889, where comments are filed)
- Project: 2005-NM-252-AD
- FR document: E6-7557
- Official PDF: https://openairdocs.org/files/sha256/55/73/557333ca5ecd1e7db25bcdcdd42090f2afcd1bd0f05757bcdb6933cb445cbd3a (from https://www.govinfo.gov/content/pkg/FR-2006-05-18/pdf/E6-7557.pdf)
- Federal Register: https://www.federalregister.gov/documents/2006/05/18/E6-7557/airworthiness-directives-airbus-model-a318-a319-a320-and-a321-series-airplanes
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A1A1C90A261F7AA786257172005CC923.0001
- Page: https://openairdocs.org/proposed/FAA-2006-23889

## Summary

The FAA is revising an earlier NPRM for an airworthiness directive (AD) that applies to certain Airbus Model A318-111 airplanes; A319-100 series airplanes; A320-111 airplanes; A320-200 series airplanes; and A321-100 and -200 series airplanes. The original NPRM would have required inspecting to determine the part number of the twin motor actuators, and related investigative and corrective actions if necessary. The original NPRM resulted from a report of a low pressure valve of the twin motor actuator found partially open, although the valve detection system indicated that the valve was closed. Investigation revealed that the locating pin in the actuator was too short to engage with the valve slot, resulting in incorrect alignment of the actuator and the drive assembly, causing the valve to remain partially open. This action revises the original NPRM by expanding the applicability. We are proposing this supplemental NPRM to ensure that, in the event of an engine fire, the valveactuator functions properly to block the fuel flow to the engine and prevent an uncontrollable fire.

## Notices in this docket

- Feb 15, 2006: Notice of proposed rulemaking (NPRM). (first notice), FR document E6-2172, comments due Mar 17, 2006 (https://www.federalregister.gov/documents/2006/02/15/E6-2172/airworthiness-directives-airbus-model-a318-111-airplanes-a319-100-series-airplanes-a320-111)
- May 18, 2006: Supplemental notice of proposed rulemaking (NPRM); reopening of comment period., FR document E6-7557, comments due Jun 12, 2006 (https://www.federalregister.gov/documents/2006/05/18/E6-7557/airworthiness-directives-airbus-model-a318-a319-a320-and-a321-series-airplanes)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.