Airworthiness Directive · Amendment 39-11246 · Boeing Model 737-600, -700, and -800 Series Airplanes
Boeing Model 737-600, -700, and -800 Series Airplanes
Model 737-600, -700, and -800 series airplanes; line numbers 1 through 110 inclusive, 112 through 183 inclusive, 185, 186, 188, 189, 191, 193, and 195; certificated in any category.
This amendment adopts a new airworthiness directive (AD) that is applicable to certain Boeing Model 737-600, -700, and -800 series airplanes. This action requires a test of the squib circuit ground studs of the engine fire extinguisher bottles to measure the resistance, and repair or replacement of the ground stud with a new ground stud, if necessary. This amendment is prompted by reports of improper grounding of the squib circuit. Such a condition would prevent the engine fire extinguisher bottle from discharging when commanded, which could result in the inability to extinguish an engine fire.
