Applicability: SAAB SF340A-004 through -159, SAAB 340B-160 through -459

Effective date: June 17, 1999

Compliance: Required as indicated in SAD 1-141.

Remarks: Where applicable, the requirements of this AD must be integrated into the Aircraft's Logbook(s). Address inquiries concerning this AD to: Civil Aviation Authority, Airworthiness Division, Ruzyne Airport, 160 08 Prague 6, Czech Republic, tel.: 420 2 33320922, fax: 420 2 20562270.

AIRWORTHINESS DIRECTIVE NO: 1-141

AIRCRAFT TYPE: SAAB SF340A and SAAB 340B

SERIAL No´s AFFECTED: SAAB SF340A-004 through -159

SAAB 340B-160 through -459

SUBJECT: Fuselage - Main Frame - Modifying Insulation to Prevent Interference with Aileron Control Mechanism

BACKGROUND: It has been found, that if insulation pads (7225245-249/-250) comes loose from lower side of fuselage at wing aft area, it might interfere with the aileron control cable segment, and thereby cause unacceptably increased control forces.

REFERENCE DOCUMENTS: Saab Aircraft AB Mandatory Service Bulletin SAAB 340-53-061 dated 21 April 1999.

ACTIONS: Perform actions described in Saab Aircraft AB Mandatory Service Bulletin SAAB 340-53-061 dated 21 April 1999 or later revision

COMPLIANCE TIME: To be performed within six (6) months after release of this SAD

EFFECTIVE DATE: 21 April 1999