# Proposed AD FAA-2008-0670: Airbus Model A318-111 and A318-112 Airplanes and Model A319, A320, and A321 Series Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2010-24-07
- Products: Airbus
- Product type: Aircraft
- Action: Supplemental notice of proposed rulemaking (NPRM); reopening of comment period.
- Published: August 4, 2010, 75 FR 46873
- Comments due: August 30, 2010
- Became: [AD 2010-24-07](https://openairdocs.org/ad/2010-24-07)
- Docket: FAA-2008-0670 (https://www.regulations.gov/docket/FAA-2008-0670, where comments are filed)
- Project: 2007-NM-339-AD
- FR document: 2010-19144
- Official PDF: https://openairdocs.org/files/sha256/0c/28/0c287f05e370a3690a9c5899e56cc31fb02d90419312895307c8f0695d8d1a41 (from https://www.govinfo.gov/content/pkg/FR-2010-08-04/pdf/2010-19144.pdf)
- Federal Register: https://www.federalregister.gov/documents/2010/08/04/2010-19144/airworthiness-directives-airbus-model-a318-111-and-a318-112-airplanes-and-model-a319-a320-and-a321
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A10F8F6E868BFD4A86257775004CAC50.0001
- Page: https://openairdocs.org/proposed/FAA-2008-0670

## Summary

We are revising an earlier NPRM for the products listed above. This action revises the earlier NPRM by expanding the scope. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

Damage to the lower lateral fittings of the 80VU rack, typically elongated holes, migrated bushes [bushings], and/or missing bolts have been reported in-service. In addition damage to the lower central support fitting (including cracking) has been reported. In the worst case scenario a complete failure of the 80VU fittings in combination with a high load factor or strong vibration could lead to failure of the rack structure and/or computers or rupture/disconnection of the cable harnesses to one or more computers located in the 80VU. This rack contains computers for Flight Controls, Communication and Radio-navigation. These functions are duplicated across other racks but during critical phases of flight the multiple system failures/re-configuration may constitute an unsafe condition. * * * * * The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.

## Notices in this docket

- Jun 24, 2008: Notice of proposed rulemaking (NPRM). (first notice), FR document E8-14184, comments due Jul 24, 2008 (https://www.federalregister.gov/documents/2008/06/24/E8-14184/airworthiness-directives-airbus-model-a318-a319-a320-and-a321-series-airplanes)
- Aug 4, 2010: Supplemental notice of proposed rulemaking (NPRM); reopening of comment period., FR document 2010-19144, comments due Aug 30, 2010 (https://www.federalregister.gov/documents/2010/08/04/2010-19144/airworthiness-directives-airbus-model-a318-111-and-a318-112-airplanes-and-model-a319-a320-and-a321)

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