Airworthiness Directive · Amendment 39-17926 · Engine exhaust
Bombardier, Inc. Airplanes
Superseded. A later AD replaced this one: AD 2017-13-09. Comply with the one in force.
This AD applies to Bombardier, Inc. Model CL-600-1A11 (CL-600) airplanes, certificated in any category, serial numbers 1004 through 1085.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-1A11 (CL-600) airplanes. This AD requires revising the airplane flight manual to prohibit thrust reverser operation, and repetitive detailed inspections of both engine thrust reversers for cracks and modification if necessary. The modification of the thrust reversers is also an optional terminating action for the repetitive inspections. This AD was prompted by reports of partial deployment of an engine thrust reverser in-flight caused by a failure of the translating sleeve at the thrust reverser attachment points. We are issuing this AD to detect and correct cracks of the translating sleeve at the thrust reverser actuator attachment points, which could result in deployment or dislodgement of an engine thrust reverser in- flight and subsequent reduced control of the airplane.
Within 1 calendar day after the effective date of this AD: Revise the applicable sections of the AFM to include the information specified in the temporary revisions (TRs) identified in paragraphs (g)(1), (g)(2), (g)(3), and (g)(4) of this AD, as applicable. These TRs introduce procedures to prohibit thrust reverser operation. Operate the airplane according to the limitations and procedures in the TRs identified in paragraphs (g)(1), (g)(2), (g)(3), and (g)(4) of this AD, as applicable. The revision required by paragraph (g) of this AD may be done by inserting copies of the applicable TRs identified in paragraphs (g)(1), (g)(2), (g)(3), and (g)(4) of this AD into the AFM. When these TRs have been included in general revisions of the AFM, the general revisions may be inserted in the AFM, provided the relevant information in the general revision is identical to that in the applicable TRs, and the TRs may be removed.
(1) Canadair TR 600/29, dated June 20, 2014, to the Canadair CL-600-1A11 AFM.
(2) Canadair TR 600/30, dated June 6, 2014, to the Canadair CL-600-1A11 AFM.
(3) Canadair TR 600-1/24, dated June 20, 2014, to the Canadair CL-600-1A11 AFM (Winglets) including Erratum, Publication No. PSP 600-1AFM (US), TR No. 600-1/24, June 20, 2014.
(4) Canadair TR 600-1/26, dated June 6, 2014, to the Canadair CL-600-1A11 AFM (Winglets).
Within 25 flight cycles or 90 days, whichever occurs first, after the effective date of this AD, do detailed inspections (including a borescope inspection) of both engine thrust reversers for cracks, in accordance with the Accomplishment Instructions of Bombardier Alert Service Bulletin A600-0769, Revision 01, dated June 26, 2014.
(1) If no cracking is found during any inspection required by paragraph (h) of this AD, repeat the inspection required by paragraph (h) of this AD thereafter at intervals not to exceed 100 flight cycles until the modification specified in paragraph (i) of this AD is done.
(2) If any cracking is found during any inspection required by paragraph (h) of this AD, before further flight, modify the thrust reversers on both engines, in accordance with the Accomplishment Instructions of Bombardier Alert Service Bulletin A600-0769, Revision 01, dated June 26, 2014.
Modifying the thrust reversers on both engines, in accordance with the Accomplishment Instructions of Bombardier Alert Service Bulletin A600-0769, Revision 01, dated June 26, 2014, terminates the inspections required by paragraph (h) of this AD.
