Airworthiness Directive · Amendment 39-14957 · Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes
Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes
This AD applies to Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes, certificated in any category; serial numbers (S/Ns) 7003 through 7067 inclusive and S/Ns 7069 through 7947 inclusive.
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. This AD requires repetitive inspections of the bolts that attach the exhaust nozzle to the aft engine flange to determine if any bolts are missing or fractured, and replacement of the existing bolts with new, improved bolts. This AD results from reports of the engine exhaust nozzle and fairing departing from the airplane in flight due to missing attachment bolts. We are issuing this AD to detect and correct missing or fractured attachment bolts, which could lead to the loss of an engine exhaust nozzle during flight and consequent structural damage to the airplane and hazard to people or property on the ground. Damage to the airplane could cause the airplane to yaw and result in reduced controllability of the airplane.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Within 1,500 flight hours after the effective date of this AD: For the left and right engine exhaust nozzles, do a detailed inspection of the bolts that attach the exhaust nozzle to the aft engine flange to determine if any bolts are missing or fractured, in accordance with Part A of the Accomplishment Instructions of Bombardier Service Bulletin 601R-78-021, dated June 2, 2006. If no bolt of an engine exhaust nozzle is missing or fractured, repeat the detailed inspection for that engine exhaust nozzle thereafter at intervals not to exceed 1,500 flight hours, until the replacement specified in paragraph (g) or (h) of this AD is accomplished.
Note 1: For the purposes of this AD, a detailed inspection is: “An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirror, magnifying lenses, etc., may be necessary. Surface cleaning and elaborate procedures may be required.”
If any bolt of an engine exhaust nozzle is found missing or fractured during any inspection required by paragraph (f) of this AD, before further flight, replace the existing bolts that attach the exhaust nozzle to the aft engine flange with new, improved bolts, in accordance with Part B of the Accomplishment Instructions of Bombardier Service Bulletin 601R-78-021, dated June 2, 2006. Accomplishing the bolt replacement for an engine exhaust nozzle terminates the repetitive inspections required by paragraph (f) of this AD for that engine exhaust nozzle only.
Note 2: Bombardier Service Bulletin 601R-78-021, dated June 2, 2006, refers to Bombardier Service Bulletin CF34-NAC-78-024, Revision 4, dated November 10, 2005, as an additional source of service information for accomplishment of the replacement.
Within 4,000 flight hours after the effective date of this AD: For the left and right engine exhaust nozzles, replace the existing bolts that attach the exhaust nozzle to the aft engine flange with new, improved bolts, in accordance with Part B of the Accomplishment Instructions of Bombardier Service Bulletin 601R-78-021, dated June 2, 2006. Accomplishing the replacement for the left and right engine exhaust nozzles terminates all of the inspections required by paragraph (f) of this AD.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
