AD NUMBER: 2007-26-11
MANUFACTURER: Oxygen
SUBJECT: Airworthiness Directive 2007-26-11
SUMMARY: We are adopting a new airworthiness directive (AD) for certain oxygen reserve cylinders.

This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country with which we have a bilateral agreement to identify and correct an unsafe condition on an aviation product.

The MCAI describes the unsafe condition as: This Airworthiness Directive (AD) is issued following information concerning the risk of high-pressure oxygen cylinder tearing with sudden emptying. These cylinders are used for missions at high altitudes or to ensure respiratory air for passengers feeling sick.

It has been demonstrated that the material characteristics of the Aluminum Alloy 5283 (AA5283) from which the cylinders are manufactured deteriorate in the course of time and may possibly lead these oxygen cylinders totear and abruptly vent aboard an aircraft.

This unsafe condition requires immediate action due tothe risk of oxygen cylinders exploding on board an aircraft and creating a fire hazard. This AD requires actions that are intended to address this unsafe condition.

FMI: www.faa.gov/regulations_policies/airworthiness_directives/