Airworthiness Directives 2004 - Revocation and Remaking - Twin Commander (Gulfstream/Rockwell/ Aerocommander 500 600 and 700) Series Aeroplanes

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 Airworthiness Directives 2004

 I, DAVID ALAN VILLIERS, delegate of the Civil Aviation Safety

 Authority, acting under subregulation 39.001 (1) of the Civil

 Aviation Safety Regulations 1998:

 (a) revoke the Airworthiness Directives mentioned in

 Schedule 1; and

 (b) make, as separate instruments, each Airworthiness

 Directive mentioned in Schedule 1 and attached.

 

 

 David Villiers

 Delegate of the Civil Aviation Safety Authority

 

  20 December 2004

 Note:   Each attached Airworthiness Directive is being re-made in exactly the

 same form as appears in the latest published edition of the Directive.

 


 Schedule 1 Revocation and Remaking of

 Airworthiness Directives

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

 Series Aeroplanes

 AD Name AD Number

 Wing Rib - Reinforcement AD/AC/1

 Augmentor Tubes - Installation of New Type Supports AD/AC/2

 Aileron Bellcrank Castings at Wing Station 196 - Replacement AD/AC/3

 Main Landing Gear Upper Retaining Pins - Replacement AD/AC/4

 Landing Gear Selector Valve - Removal of AN 6207 Check Valve AD/AC/5

 Fuel Vent and Vapour Return Lines - Modification AD/AC/6

 Rudder Torque Tube - Inspection AD/AC/7

 Power Brake Valve - Modification AD/AC/8

 Vertical and Horizontal Stabiliser - Spar Reinforcement AD/AC/9

 Fuel Line Routing - Modification AD/AC/10

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

 Horizontal Stabiliser - Modification AD/AC/12

 Hydraulic and Engine Oil S/O Valve Circuit Breaker - Insulation AD/AC/13

 Clear Vinyl Covers in Cabin Interior - Removal AD/AC/14

 Centre Wing - Rear Spar Reinforcement AD/AC/15

 Baggage Compartment and Rear Cabin Areas - Corrosion Inspection and  AD/AC/16

 Landing Gear Truss Attach Angle - Inspection AD/AC/17 A

 Battery Relay Terminal - Insulation AD/AC/18

 Throttle Control Rod Ends - Inspection and Replacement AD/AC/19

 Rudder Trim Tab Hinge Mount - Inspection AD/AC/20

 CANCELLED AD/AC/21

 Induction Air Control Valves and Mounting Shafts - Replacement AD/AC/22

 Main Landing Gear Struts - Inspection and Modification AD/AC/23

 Fuel Pressure Gauge Vent Drain - Installation AD/AC/24

 Circuit Breaker Panel - Insulator Inspection AD/AC/25

 Elevator Torque Tube - Inspection and Modification AD/AC/26

 Main Landing Gear Actuating Cylinder Body - Inspection AD/AC/27

 Main Landing Gear Truss - Inspection AD/AC/28

 Fuel Sump Casting P/N 4630068 - Inspection AD/AC/29 Amdt 2


 Replacement of Fuel System Aluminium Drain Tubing and Fittings and Wing  AD/AC/30

 CANCELLED AD/AC/31 Amdt 4

 Aileron Cable Drum Cable Retainer - Modification AD/AC/32

 CANCELLED AD/AC/33 Amdt 1

 Main Landing Gear Upper Bearing - Modification AD/AC/34

 Rudder Torque Tube - Modification AD/AC/35

 Wing Front Spar Lower Cap - Inspection AD/AC/36 Amdt 2

 Cockpit Windows - Modification AD/AC/37

 Emergency Exit Latch - Inspection AD/AC/38

 Wing Front Spar Lower Cap - Inspection AD/AC/39

 Engine Mount Yoke - Inspection AD/AC/40

 Nose Gear Support Structure - Inspection AD/AC/41

 Wing Main Spar Lower Cap W.S. 24 AD/AC/42 Amdt 7

 Elevator Servo Cable Guard Plate - Installation AD/AC/43

 Engine Tailpipe Assemblies - Inspection and/or Replacement AD/AC/44

 Nose Wheel Tyre - Inspection and Replacement AD/AC/45

 Separation of Electrical Wiring from Fuel Line AD/AC/46

 Front Seat Restraint Installation - Modification AD/AC/47

 Rudder Control Balance - Inspection AD/AC/48

 Wing Main Spar - Inspection AD/AC/49

 Unfeathering Pump Supply Line - Replacement AD/AC/50

 Cabin Differential Pressure Limitations AD/AC/51

 Pilot Compartment Side Windows - Replacement AD/AC/52

 Pressurised Cabin Structure - Inspection and Modification AD/AC/53

 Aileron Trim Tab - Inspection and Repair AD/AC/54

 CANCELLED AD/AC/55

 Elevator Control System Bob Weight Installation - Inspection and Modification AD/AC/56 Amdt 3

 Pre-Certification Requirements - Modifications AD/AC/57

 Elevator Control System Bob Weight Installation - Inspection and Modification -  AD/AC/58 Amdt 2

 Flap System - Flap Control Bracket - Inspection and Modification AD/AC/59 Amdt 1

 Aft Facing Seats - Placard - Installations AD/AC/60

 Elevator Trim Sprocket Assembly - Inspection and Modification AD/AC/61 Amdt 1

 Forward and Aft Inboard Wing Spar Cap Rivets - Inspection and Replacement AD/AC/62

 Electric Elevator Trim Speed - Modification AD/AC/63

 Fatigue Life Limitation - Pressurised Fuselage AD/AC/64

 Wing Spar Fillet Screws - Inspection and Replacement AD/AC/65


 Wing Fatigue Life Limitation AD/AC/66 Amdt 8

 Goodyear Fuel Cells - Inspection AD/AC/67

 Elevator Bungee Springs - Inspection AD/AC/68

 Main Landing Gear Torque Link Pin Retaining Bolt - Inspection AD/AC/69

 Engine Oil Breather Line - Modification AD/AC/70

 Aft Engine Mount Attachment - Inspection AD/AC/71

 Main Cabin Door Bayonet Rigging - Inspection AD/AC/72

 Wing Fasteners - Modification AD/AC/73

 Fairleads On Aft Fuselage Frames - Installation AD/AC/74 Amdt 2

 Main Cabin Door Fasteners - Inspection AD/AC/75

 Engine Control Cables, Jam Nuts - Modification AD/AC/76

 Induction Air Elbow Duct - Replacement, Exhaust System - Inspection AD/AC/77

 Flight Control Chain Connector Link - Inspection AD/AC/78

 Rudder Control Cable Fraying AD/AC/79 Amdt 2

 Aileron Leading Edge Skin - Modification AD/AC/80 Amdt 1

 Elevator Trim Tab AD/AC/81 Amdt 1

 Engine Isolator Assembly- Inspection and/or Replacement AD/AC/82

 Corrosion of Wing Lower Spar Cap AD/AC/83 Amdt 8

 Empennage Attachment AD/AC/84 Amdt 1

 Flight in Icing Conditions AD/AC/85 Amdt 1

 Wing Main Spar Lower Cap Microstructure AD/AC/86 Amdt 1

 Wing Main Spar Steel Strap Corrosion AD/AC/87

 Flap System AD/AC/88 Amdt 1

 Aileron Control System - CANCELLED AD/AC/89

 Wing Station 39 Wing Ribs AD/AC/90

 Wing - Main Spar Lower Cap Forward Flange at Wing Station 96 AD/AC/91

 Wing Skin Near Main Landing Gear AD/AC/92

 Wing to Fuselage Attachment AD/AC/93 Amdt 1

 Airspeed in Turbulence AD/AC/94

 Bleed Air System Leak Check AD/AC/95

 Nose Landing Gear Bolt AD/AC/96 Amdt 1

 Aircraft Flight Manual, Flight into Icing Conditions AD/AC/97

 Operation of Deicing Boots AD/AC/98

 Wing and Fuselage Structure AD/AC/99

 

Overview

The Airworthiness Directives 2004, enacted under the Civil Aviation Safety Regulations 1998, were introduced to address specific safety concerns related to the maintenance and operation of Twin Commander (Gulfstream/Rockwell/Aerocommander 500, 600, and 700) series aeroplanes. These directives were issued by David Alan Villiers, a delegate of the Civil Aviation Safety Authority, and serve to ensure the continued airworthiness of these aircraft by mandating specific modifications, inspections, and replacements. The policy objective behind these directives is to maintain the highest safety standards in civil aviation by addressing identified safety issues and ensuring compliance with updated safety protocols. This legislative instrument revokes existing airworthiness directives and remakes them to reflect the latest safety requirements. Each directive is re-made in its entirety to ensure clarity and compliance with current safety standards. The enacting body is the Civil Aviation Safety Authority, which aims to protect the public and enhance the safety of civil aviation through these detailed airworthiness directives.

Scope and Application

The Airworthiness Directives 2004, issued by the delegate of the Civil Aviation Safety Authority (CASA) under the Civil Aviation Safety Regulations 1998, apply to specific series of Twin Commander aeroplanes, namely the Gulfstream/Rockwell/ Aerocommander 500, 600, and 700 models. These directives encompass a variety of maintenance and modification requirements intended to ensure the airworthiness of the specified aircraft. The geographic reach of these directives is nationwide, impacting all operators of the specified aircraft within Australia. This legislation revokes certain previous airworthiness directives and re-issues them to maintain compliance with current safety standards and regulatory requirements. The directives themselves outline specific technical requirements and modifications that must be undertaken on these aircraft, such as inspections, replacements, and modifications to various components including wings, landing gear, and control systems. While the primary focus is on ensuring the safety and airworthiness of the aircraft, any exclusions, exemptions, or thresholds are detailed within the individual directives attached to the legislative instrument. The application of these directives can be further extended or restricted through subordinate instruments as deemed necessary by CASA.

Key Provisions

The Airworthiness Directives 2004 legislative instrument, issued by David Alan Villiers, a delegate of the Civil Aviation Safety Authority, revokes existing Airworthiness Directives and remakes them as separate instruments. The instrument is made under subregulation 39.001 (1) of the Civil Aviation Safety Regulations 1998, which empowers the Authority to issue such directives to ensure airworthiness of aircraft. Schedule 1 lists the specific directives that are being revoked and remade. The directives cover a range of aircraft parts and systems, including wing ribs, landing gear, control surfaces, and cabin interior components, each identified by an AD number. The obligations imposed by the Act on the parties or entities it governs primarily revolve around compliance with the specific requirements outlined in each Airworthiness Directive. Aircraft operators, maintenance organisations, and other relevant parties must adhere to the detailed instructions provided in each directive to ensure the safety and airworthiness of the aircraft. This includes conducting necessary inspections, modifications, or replacements of specified components and systems within the stipulated timeframes. Failure to comply with these directives could result in the aircraft being deemed unairworthy, thereby preventing it from operating until the required actions are taken. The Airworthiness Directives 2004 also establish consequences for non-compliance with the provisions of the Act. While the specific offences and penalties are not detailed in the text provided, generally, breaches of Airworthiness Directives can lead to severe civil and criminal penalties. These may include fines, imprisonment, or both, depending on the severity and impact of the non-compliance. The maximum penalties are typically determined by the specific regulatory framework under which the Civil Aviation Safety Authority operates, which may vary based on the nature of the breach and its potential to affect aviation safety.

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Sourced from the Federal Register of Legislation at 26 August 2026. For the latest information on Australian Government law please go to https://www.legislation.gov.au.