Airworthiness Directive · Amendment 39-18863 · Electrical power
Bombardier, Inc., Airplanes
This AD applies to Bombardier, Inc., Model CL-600-2E25 (Regional Jet Series 1000) airplanes, certificated in any category, as identified in Bombardier Service Bulletin 670BA-24-037, Revision A, dated July 11, 2016.
We are adopting a new airworthiness directive (AD) for certain Bombardier, Inc., Model CL-600-2E25 (Regional Jet Series 1000) airplanes. This AD requires a detailed inspection of the circuit breakers, replacement of damaged circuit breakers, and installation of a circuit breaker bushing assembly. This AD was prompted by a report of cracks found in the plastic casing of cockpit circuit breaker panels. We are issuing this AD to address the unsafe condition on these products.
At the applicable time specified in paragraph (g)(1) or (g)(2) of this AD: Do a detailed visual inspection for any cracks or signs of damage on each circuit breaker in the cockpit circuit breaker panels, and replace any cracked or damaged circuit breakers, in accordance with “Part A—Inspection and Replacement of the Damaged Cockpit Panel Circuit Breakers,” of the Accomplishment Instructions of Bombardier Service Bulletin 670BA-24-037, Revision A, dated July 11, 2016. Replace any cracked or damaged circuit breakers before further flight.
(1) For airplanes that have accumulated less than 10,000 total flight hours as of the effective date of this AD: Before the accumulation of 12,600 total flight hours.
(2) For airplanes that have accumulated 10,000 or more total flight hours as of the effective date of this AD: Within 2,000 flight hours after the effective date of this AD.
At the applicable time specified in paragraph (h)(1) or (h)(2) of this AD: Install a cockpit breaker bushing assembly, and do a detailed visual inspection of each circuit breaker for cracks or damage, in accordance with “Part B—Installation of the Cockpit Panel Circuit Breakers Bushings assembly,” of the Accomplishment Instructions of Bombardier Service Bulletin 670BA-24-037, Revision A, dated July 11, 2016. Replace any cracked or damaged circuit breakers before further flight, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 670BA-24-037, Revision A, dated July 11, 2016. Installing the cockpit panel circuit breaker bushing assembly is acceptable for compliance with the requirements of paragraph (g) of this AD.
(1) For airplanes that have accumulated less than 10,000 total flight hours as of the effective date of this AD: Before the accumulation of 12,600 total flight hours.
(2) For airplanes that have accumulated 10,000 or more total flight hours as of the effective date of this AD: Within 2,000 flight hours after the effective date of this AD.
