Airworthiness Directive · Amendment 39-17033 · Extinguishing system
Learjet Inc. Airplanes
This AD applies to Learjet Inc. Model 60 airplanes, certificated in any category, serial numbers 60-002 through 60-366 inclusive.
We are adopting a new airworthiness directive (AD) for certain Learjet Inc. Model 60 airplanes. This AD was prompted by two incidents of swapped fire extinguishing wires. This AD requires inspecting the electrical leads routed to the fire extinguishing containers for proper identification and missing labels, and to ensure the electrical leads are connected to the correct squibs; and corrective actions if necessary. We are issuing this AD to prevent the extinguishing agent of the fire extinguishing container from being delivered to the wrong engine in the event of an engine fire, and a consequent uncontrolled fire.
At the applicable time specified in paragraph (g)(1) or (g)(2) of this AD: Inspect the electrical leads routed to the fire extinguishing containers for proper identification and missing labels, and to ensure the electrical leads are connected to the correct squibs, as specified in Bombardier Service Bulletin 60-26-4, dated May 2, 2011. Do the inspection in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 60-26-4, dated May 2, 2011. If any misidentification is found, or if any label is missing, or if the electrical leads are not connected to the correct squibs, as specified in Bombardier Service Bulletin 60-26-4, dated May 2, 2011: Before further flight, do all applicable corrective actions, in accordance with the Accomplishment Instructions of Bombardier Service Bulletin 60-26-4, dated May 2, 2011.
(1) For airplanes equipped with an APU: Within 300 flight hours after the effective date of this AD, or at the next auxiliary power unit (APU) removal, whichever occurs first.
(2) For airplanes not equipped with an APU: Within 300 flight hours after the effective date 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.
Aircraft
