Airworthiness Directive · Amendment 39-13662 · Saab Model SAAB SF340A and SAAB 340B Series Airplanes
Saab Model SAAB SF340A and SAAB 340B Series Airplanes
Superseded. A later AD replaced this one: AD 2011-27-05. Comply with the one in force.
Model SAAB SF340A series airplanes with serial numbers 004 through 159 inclusive; and Model SAAB 340B series airplanes with serial numbers 160 through 459 inclusive; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Saab Model SAAB SF340A and SAAB 340B series airplanes, that requires inspection of the main landing gear's (MLG) separation bolt harness, corrective actions if necessary, and replacement of the MLG's separation bolt harness. For certain airplanes, this AD also requires modification of the MLG separation bolt's electrical harness. This action is necessary to prevent failure of the MLG to extend during use of the emergency backup system. This action is intended to address the identified unsafe condition.
To prevent failure of the main landing gear (MLG) to extend during use of the emergency backup system, accomplish the following:
(a) Within 3 months after the effective date of this AD, perform an inspection of the MLG's separation bolt harness for broken wires and corroded connectors, and any applicable corrective actions by doing all of the actions in the Accomplishment Instructions of Saab Service Bulletin (SB) 340-32-127, dated December 18, 2002; or Revision 01, dated January 23, 2003. Perform the inspection/corrective actions in accordance with the service bulletin. Perform any applicable corrective actions before further flight.
(b) Within 12 months after the effective date of this AD, replace the separation bolt harnesses of the MLGs with new separation bolt harnesses in accordance with the Accomplishment Instructions of Saab SB 340-32-128, dated March 28, 2003.
(c) The inspection required by paragraph (a) of this AD is not required for airplanes on which the replacement required by paragraph (b) of this AD is done within the compliance time specified in paragraph (a) of this AD.
(d) For Model SAAB SF340A series airplanes: Prior to or concurrent with accomplishment of paragraph (b) of this AD, do the actions specified in Table 1 of this AD, as applicable.
| For airplanes with serial numbers— | Accomplish all actions associated with— | According to the accomplishment instructions of— |
|---|---|---|
| 004 through 108 inclusive | Modifying the MLG separation bolt's electrical harness | Saab SB 340-32-041, Revision 01, dated October 9, 1987. |
| 004 through 078 inclusive | Modifying the MLG separation bolt's electrical harness | Saab SB 340-32-028, Revision 01, dated November 25, 1986. |
(e) In accordance with 14 CFR 39.19, the Manager, International Branch, ANM-116, FAA, Transport Airplane Directorate, is authorized to approve alternative methods of compliance for 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
