Summary
We propose to supersede Airworthiness Directive (AD) 2014-20- 01, for certain Bombardier, Inc. Model CL-600-2B16 (CL-601-3A, CL-601- 3R, and CL-604 Variants) airplanes. AD 2014-20-01 currently requires repetitive inspections for any fuel leak in the right-hand landing lights compartment, and related investigative and corrective actions if necessary. AD 2014-20-01 also provides for an optional replacement of the connector of the fuel boost pump canister of the auxiliary power unit (APU), which terminates the repetitive inspections. Since we issued AD 2014-20-01, we have determined that a terminating action for the repetitive inspections is necessary. This proposed AD would retain the repetitive inspections for any fuel leak in the right-hand landing lights compartment and the related investigative and corrective actions, and would require replacing the connector of the fuel boost pump canister of the APU. We are proposing this AD to detect and correct fuel leaks in the right-hand landing lights compartment, which, in combination with the heat generated by the taxi lights and landing lights on the ground reaching the auto-ignition temperature of the fuel, could result in ignition of any fuel or fumes present in the right-hand landing lights compartment.