Airworthiness Directive · Amendment 39-13744 · Saab Model SAAB SF340A Series Airplanes
Saab Model SAAB SF340A Series Airplanes
Model SAAB SF340A series airplanes, manufacturer serial number -004 through -028 inclusive; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Saab Model SAAB SF340A series airplanes, that requires replacing certain power wires with a modification harness; and testing the new harness installation. These actions are necessary to prevent a momentary loss of data on the left-hand electronic flight instrumentation system (LH EFIS) screens, which could lead to the pilot's loss of situational awareness during initial climb or approach/ landing, and possibly result in reduced control of the airplane. This action is intended to address the identified unsafe condition.
To prevent a momentary loss of data on the left-hand electronic flight instrumentation system (LH EFIS) screens, which could lead to the pilot's loss of situational awareness during initial climb or approach/landing, and possibly result in reduced control of the airplane, accomplish the following:
(a) Within 12 months after the effective date of this AD, replace certain power wires with a modification harness, and test the harness installation; by doing all of the actions in, and in accordance with, the Accomplishment Instructions of Saab Service Bulletin 340-29-021, Revision 02, dated October 2, 2002.
(b) In accordance with 14 CFR 39.19, the Manager, International Branch, ANM-116, Transport Airplane Directorate, FAA, is authorized to approve alternative methods of compliance for this AD.
