Airworthiness Directive · Amendment 39-15553 · Fuel
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 7003 through 7067 inclusive, and 7069 through 7982 inclusive.
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as: * * * * * This assessment showed that the electrical harness of the Fuel Quantity Gauging System (FQGS) is installed in the same routing as the 28 Volts AC, 28 Volts DC, and 115 Volts AC electrical harnesses. A chafing condition between these electrical harnesses and the FQGS harness could increase the surface temperatures of fuel quantity probes and high level sensors inside the fuel tank, resulting in potential ignition source[s] and consequent fuel tank explosion. * * * * * We are issuing this AD to require actions to correct the unsafe condition on these products.
Within 10,000 flight hours after the effective date of this AD, unless already done, do the following actions.
(1) Modify the FQGS harness routing according to the Accomplishment Instructions of Bombardier Service Bulletin 601R-28-059, Revision E, dated October 29, 2007.
(2) Actions done before the effective date of this AD in accordance with the Bombardier service information specified in Table 1 of this AD are acceptable for compliance with the corresponding requirements of this AD.
| Service Bulletin | Revision | Date |
|---|---|---|
| 601R-28-059 | Original | October 19, 2004. |
| 601R-28-059 | A | July 28, 2005. |
| 601R-28-059 | B | November 17, 2005. |
| 601R-28-059 | C | March 8, 2007. |
| 601R-28-059 | D | May 10, 2007. |
Note: This AD differs from the MCAI and/or service information as follows: No differences.
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.
