AD 2012-10-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Airplanes |
Unsafe Condition
Deformation of the pressure regulator on the oxygen cylinder, attributed to batches of raw material that did not meet required tensile strength, could result in elongation of the pressure regulator neck, leading to rupture of the oxygen cylinder and unavailability of oxygen during cabin depressurization.
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Required Actions
Inspect the serial number of each oxygen pressure regulator, part number 806370-06, to determine if it is listed in Table 2 of Bombardier Service Bulletin 670BA-35-011. If listed, replace the affected oxygen cylinder and regulator assembly (CRA) before further flight, in accordance with the Accomplishment Instructions of the service bulletin.
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Compliance Time
Within 1,800 flight hours or 6 months after the effective date of this AD, whichever occurs first.
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Affected Aircraft
Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700, 701, & 702), CL-600-2D15 (Regional Jet Series 705), CL-600-2D24 (Regional Jet Series 900), and CL-600-2E25 (Regional Jet Series 1000) airplanes, with specific serial number ranges.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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