Airworthiness directives › 2016-20-09
AD 2016-20-09 Airworthiness Directives; Bombardier, Inc. Airplanes
Applicability*9
This AD applies to Bombardier, Inc. airplanes, certificated in any category, identified in paragraphs (c)(1), (c)(2), and (c)(3) of this AD. (1) Model CL-600-2A12 (CL-601 Variant) airplanes, having serial numbers (S/Ns) 3001 through 3066 inclusive. (2) Model CL-600-2B16 (CL-601-3A and CL-601-3R Variants) airplanes, having S/Ns 5001 through 5194 inclusive. (3) Model CL-600-2B16 (CL-604 Variant) airplanes, having S/Ns 5301 through 5665 inclusive, and 5701 through 5970 inclusive.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 24 months after the effective date of this AD, comply with the applicable actions specified in paragraphs (g)(1) through (g)(3) of this AD, except as required by paragraph (i) of this AD. Do all applicable corrective actions before further flight. (1) For Model CL-600-2A12 (CL-601 Variant) airplanes, having S/Ns 3001 through 3066 inclusive; and Model CL-600-2B16 (CL-601-3A and CL-601-3R Variants) airplanes, having S/Ns 5001 through 5194 inclusive: Do a detailed inspection for chafing conditions of the negative-G fuel feed drain line of the APU, and do all applicable corrective actions, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 601-0640, dated May 19, 2015. (2) For Model CL-600-2B16 (CL-604 Variant) airplanes, having S/Ns 5301 through 5665 inclusive: Do a detailed inspection for chafing conditions of the negative-G fuel feed drain line of the APU, and do all applicable corrective actions, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 604-28-021, dated May 19, 2015. (3) For Model CL-600-2B16 (CL-604 Variant) airplanes, having S/Ns 5701 through 5913 inclusive, 5917, 5918, and 5923 through 5970 inclusive: Do a detailed inspection for chafing conditions of the negative-G fuel feed drain line of the APU, and do all applicable corrective actions, in accordance with the Accomplishment Instructions in Part A and, if applicable, Part B of Bombardier Service Bulletin 605-28-009, dated May 19, 2015.
Unsafe condition
This AD was prompted by a report that a potential chafing condition exists between the negative-G fuel feed drain line of the auxiliary power unit (APU) and its surrounding structure and components. We are issuing this AD to prevent a chafing condition in the negative-G fuel feed drain line, which can result in fuel leaking from the drain line. This condition, in combination with a nearby hot surface or other potential ignition source, could result in an uncontrolled fire in the aft equipment bay.
Affected ADs
None.
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