# Proposed AD FAA-2009-0324: Airbus Model A300 B4-601, B4-603, B4- 605R, B4-620, B4-622, B4-622R, F4-605R, F4-622R, and C4-605R Variant F Series Airplanes Equipped With Simmonds Precision Products, Inc., Fuel Quantity Indicating System Sensors and In-Tank Harnesses Installed in Accordance With Supplemental Type Certificate (STC) ST00092BO

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 2009-21-02
- Products: Airbus
- Product type: Aircraft
- Action: Notice of proposed rulemaking (NPRM).
- Published: April 9, 2009, 74 FR 16152
- Comments due: May 26, 2009
- Became: [AD 2009-21-02](https://openairdocs.org/ad/2009-21-02)
- Docket: FAA-2009-0324 (https://www.regulations.gov/docket/FAA-2009-0324, where comments are filed)
- Project: 2008-NM-186-AD
- FR document: E9-8081
- Official PDF: https://openairdocs.org/files/sha256/3f/40/3f400d18466cc5ed308220c3772c52a6f3d7dd2bd22e6ada33e40f8fdf34abd6 (from https://www.govinfo.gov/content/pkg/FR-2009-04-09/pdf/E9-8081.pdf)
- Federal Register: https://www.federalregister.gov/documents/2009/04/09/E9-8081/airworthiness-directives-airbus-model-a300-b4-601-b4-603-b4-605r-b4-620-b4-622-b4-622r-f4-605r
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/84D49CF199C93BC08625759300636075.0001
- Page: https://openairdocs.org/proposed/FAA-2009-0324

## Summary

We propose to adopt a new airworthiness directive (AD) for certain Airbus model series airplanes. This proposed AD would require revising the Airworthiness Limitations Section of the Instructions for Continuing Airworthiness to incorporate new fuel system limitations for airplanes modified in accordance with STC ST00092BO. This AD also requires performing a general visual inspection for tank unit separation and compensator separation of the: center, inner, outer fuel tanks, and trim fuel tanks of the tank units, and corrective actions if necessary. This proposed AD results from fuel system reviews conducted by the manufacturer. We are proposing this AD to prevent a potential of ignition sources inside fuel tanks, which in combination with flammable fuel vapors, could result in a fuel tank fire or explosion and consequent loss of the airplane.

## Notices in this docket

- Apr 9, 2009: Notice of proposed rulemaking (NPRM). (first notice), FR document E9-8081, comments due May 26, 2009 (https://www.federalregister.gov/documents/2009/04/09/E9-8081/airworthiness-directives-airbus-model-a300-b4-601-b4-603-b4-605r-b4-620-b4-622-b4-622r-f4-605r)

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