Airworthiness Directive · Amendment 39-11985 · Israel Aircraft Industries, Ltd., Model 1121, 1121A, 1121B, 1123, 1124, and 1124A Series Airplanes
Israel Aircraft Industries, Ltd., Model 1121, 1121A, 1121B, 1123, 1124, and 1124A Series Airplanes
All Model 1121, 1121A, 1121B, 1123, 1124, and 1124A series airplanes; certificated in any category.
Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or repaired so that the performance of the requirements of this AD is affected, the owner/operator must request approval for an alternative method of compliance in accordance with paragraph (c) of this AD. The request should include an assessment of the effect of the modification, alteration, or repair on the unsafe condition addressed by this AD; and, if the unsafe condition has not been eliminated, the request should include specific proposed actions to address it.
This amendment adopts a new airworthiness directive (AD) that is applicable to all Israel Aircraft Industries, Ltd., Model 1121, 1121A, 1121B, 1123, 1124, and 1124A series airplanes. This action requires a one-time inspection, and corrective action if necessary, to ensure the proper installation of the tie rod through the dust shield and both jackscrew assemblies on the horizontal stabilizer trim actuator. This action is necessary to prevent jamming or disconnection of the horizontal stabilizer trim actuator, which could result in reduced pitch control of the airplane. This action is intended to address the identified unsafe condition.
To prevent jamming or disconnection of the horizontal stabilizer trim actuator, which could result in reduced pitch control of the airplane, accomplish the following:
(a) Within 25 flight hours after the effective date of this AD: Perform a detailed visual inspection to determine whether the tie rod is installed correctly through the dust shield and both jackscrew assemblies of the horizontal stabilizer trim actuator. Do the inspection per Israel Aircraft Industries Alert Service Bulletins 1121-27A-028 (for 1121 JET COMMANDER series airplanes), 1123-27A-053 (for 1123 WESTWIND series airplanes), or 1124-27A-147 (for 1124 and 1124A WESTWIND series airplanes); all dated August 28, 2000; as applicable.
Note 2: For the purposes of this AD, a detailed visual inspection is defined as: “An intensive visual examination of a specific structural area, system, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at intensity deemed appropriate by the inspector. Inspection aids such as mirror, magnifying lenses, etc., may be used. Surface cleaning and elaborate access procedures may be required.”
(1) If both the tie rod and the dust shield are correctly assembled: No further action is required by this AD.
(2) If either the tie rod or the dust shield is not correctly assembled: Prior to further flight, accomplish the actions specified by either paragraph (a)(2)(i) or (a)(2)(ii).
(i) Replace the horizontal stabilizer trim actuator with a serviceable part in accordance with the airplane maintenance manual. Or
(ii) Repair the horizontal stabilizer trim actuator in accordance with a method approved by the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate; or the Civil Aviation Administration of Israel (CAAI) (or its delegated agent). For a repair method to be approved by the Manager, International Branch, ANM-116, as required by this paragraph, the Manager's approval letter must specifically reference this AD.
(b) As of the effective date of this AD, no person shall install a horizontal stabilizer trim actuator on any airplane, unless the actuator has been inspected and all applicable corrective actions have been performed in accordance with the requirements 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
