Airworthiness Directive · Amendment 39-18675 · Fuel
Bombardier, Inc. Airplanes
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.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2A12 (CL-601 Variant), and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604 Variants) airplanes. 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. This AD requires, for certain airplanes, a detailed inspection for chafing conditions of the negative-G fuel feed drain line of the APU, and corrective actions if necessary. For certain other airplanes, this AD requires replacement of the APU negative-G fuel feed tube assembly and the drain line. We are issuing this AD to address the unsafe condition on these products.
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.
For Model CL-600-2B16 (604 Variant) airplanes having S/Ns 5914 through 5916 inclusive and 5919 through 5922 inclusive: Within 24 months after the effective date of this AD, replace the APU negative-G fuel feed tube assembly and the drain line, in accordance with Part C of the Accomplishment Instructions of Bombardier Service Bulletin 605-28-009, dated May 19, 2015.
Note 1 to paragraph (h) of this AD: An inspection is not required.
Where any service information identified in paragraphs (g)(1), (g)(2), and (g)(3) of this AD specifies to contact the manufacturer for corrective action, before further flight, repair using a method approved by the Manager, New York Aircraft Certification Office (ACO), ANE-170, FAA; or Transport Canada Civil Aviation (TCCA); or Bombardier, Inc.'s TCCA Design Approval Organization (DAO).
