AD/AC/11 - Flap Pulley Assembly Right Inboard Station 13.625 - Modification

What this is: A mandatory safety direction (called an Airworthiness Directive) issued by the Civil Aviation Safety Authority (CASA) that requires immediate action on specific aircraft.

Who it affects: Owners and operators of Twin Commander aeroplanes (models 500, 600 and 700 series) with serial numbers 231 through 710. These aircraft are also known as Gulfstream/Rockwell/Aerocommander models.

What you must do: Modify the right inboard flap pulley assembly located at Station 13.625 (a specific point on the aircraft's structure) by following the manufacturer's instructions in Aero Commander Service Bulletin No. 55.

When: Forthwith — meaning immediately, before the aircraft flies again.

Why it matters: This modification addresses a specific airworthiness issue with the flap system (the flaps are the surfaces on the wings that help control lift during takeoff and landing). The directive ensures the aircraft remains safe to fly.

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes

AD/AC/11 Flap Pulley Assembly Right Inboard NK

Station 13.625 - Modification

Applicability: All models: S/Nos. 231 to 710. Document: Aero Commander SB No. 55. Compliance: Forthwith.

meta-content-style-type: text/css meta-content-type: application/xhtml+xml; charset=utf-8 meta-description: CASA Airworthiness Directive meta-generator: Aspose.Words for .NET 22.10.0 meta-keywords: Issue NK,Aircraft below 5700 kg,Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes,Flap Pulley Assembly Right Inboard Station 13.625 - Modification,11 title: Airworthiness Directive - AD/AC/11 - Flap Pulley Assembly Right Inboard Station 13.625 - Modification

?xml version="1.0" encoding="utf-8" standalone="no"?>

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) Series Aeroplanes

AD/AC/11 Flap Pulley Assembly Right Inboard NK

Station 13.625 - Modification

Applicability: All models: S/Nos. 231 to 710. Document: Aero Commander SB No. 55. Compliance: Forthwith.

AD/AC/11 - Flap Pulley Assembly Right Inboard Station 13.625 - Modification

Plain English Summary

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AD/AC/11 - Flap Pulley Assembly Right Inboard Station 13.625 - Modification

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