Airworthiness Directive · Amendment 39-9447 · Learjet Inc. Airplanes
Learjet Inc. Airplanes
Superseded. A later AD replaced this one: AD 2005-16-09. Comply with the one in force.
This AD applies to Learjet Inc. 23, 24, 25, 35, 36.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
This amendment adopts a new airworthiness directive (AD) that is applicable to certain Learjet Model 23, 24, 25, 35, and 36 airplanes. This action requires repetitive inspections to detect deterioration of both flapper valves of the tip tank in each wing of the airplane, and various follow-on actions. This AD action also requires replacing the flapper valves with new flapper valves, and repetitively performing certain other follow-on actions. This amendment is prompted by reports of imbalance of the fuel loads in the wings of the airplane due to failed or cracked flapper valves. The actions specified in this AD are intended to prevent significant reduction in the lateral control of the airplane due to imbalance of the fuel loads in the wings of the airplane.
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
