Airworthiness directives › 2015-17-16
AD 2015-17-16 Airworthiness Directives; Bombardier, Inc. Airplanes
Applicability*9
This AD applies to Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes, certificated in any category, serial numbers 7003 and subsequent.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 5,800 flight hours or 44 months after the effective date of this AD, whichever occurs first: Replace all oxygen hose assemblies having part number (P/N) 38026-4-0280-000 with new, improved assemblies having P/N 601R44045-1, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 601R-35-018, dated May 21, 2013.
Unsafe condition
This AD was prompted by results of a design review indicating that the burst pressure of the flexible hose, used to vent oxygen from the high-pressure relief valve of the oxygen cylinder overboard, was lower than the opening pressure of the high-pressure relief valve, which could cause the flexible hose to burst before it can vent the excess oxygen overboard. We are issuing this AD to prevent the accumulation of oxygen in an enclosed space, which could result in an uncontrolled oxygen-fed fire if an ignition source is nearby.
Affected ADs
None.
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