Airworthiness Directives 2004 - Revocation and Remaking - DHC-6 (Twin Otter) Series Aeroplanes (Cth)

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

DHC-6 (Twin Otter) Series Aeroplanes

AD Name  AD Number

Upper Rudder Fairing - Modification  AD/DHC-6/1

Fuel System Crossfeed Thermal Relief - Modification  AD/DHC-6/2

Airstair Door Safety Guard - Modification  AD/DHC-6/3

Nose Landing Gear - Modification  AD/DHC-6/4

Fuselage Frame and Wing Strut - Modification  AD/DHC-6/5

Tailplane Attachment Bolts - Modification  AD/DHC-6/6

Elevator Rear Spar - Inspection and Modification  AD/DHC-6/7 Amdt 1

Airspeed Placard Installation and Left Elevator Trim Tab - Inspection             AD/DHC-6/8 Amdt 1

Left and Right Hand Elevators Upper Skin - Modification  AD/DHC-6/9

Left Hand Elevator Trim Tab - Replacement  AD/DHC-6/10

Flap Elevator Trim Cables - Modification  AD/DHC-6/11

Aileron Mass Balance - Modification  AD/DHC-6/12

Flap Control Push Rod Assembly - Modification  AD/DHC-6/13

Fuselage to Wing Front Spar Attachments - Inspection  AD/DHC-6/14

Wing Strut Jo-Bolt - Inspection  AD/DHC-6/15 Amdt 1

Wing Front Spar Attachment Fittings  AD/DHC-6/16 Amdt 5

Control Column - Lower Sub-Assembly - Inspection  AD/DHC-6/17 Amdt 1

Rudder and Elevator Pulley Bracket Assembly Stn 106 - Inspection                   AD/DHC-6/18 Amdt 1

Propeller and Power Control Lever Interlock - Mod  AD/DHC-6/19

CANCELLED  AD/DHC-6/20

Elevator Connecting Rod - Inspection  AD/DHC-6/21 Amdt 1

Propeller Auto Feather System - Modification  AD/DHC-6/22

Inverter Fuses - Replacement  AD/DHC-6/23

Elevator and Tailplane  AD/DHC-6/24 Amdt 3

Main Undercarriage Platen Attach Link Fittings - Inspection  AD/DHC-6/25 Amdt 1

Nose Landing Gear Fork Lock Pin - Inspection  AD/DHC-6/26

Fuel Cell Sump Plate Flapper Valve Seals - Modification  AD/DHC-6/27

Engine Compressor Inlet Screens - Icing Restrictions  AD/DHC-6/28

Airframe De-Icing System - Modification  AD/DHC-6/29

Air Conditioning Compartment - Modification  AD/DHC-6/30

Structural Component Inspection, Modification and Life Limitation                 AD/DHC-6/31 Amdt 3

Fuel Vent System - Modification  AD/DHC-6/32

Elevator Root and Nose Ribs  AD/DHC-6/33 Amdt 4

Pilot Seats Safety Restraint Installations - Modification  AD/DHC-6/34

Wing Rear Spar Attachment Fittings  AD/DHC-6/35 Amdt 2

Overhead Console Control Quadrants  AD/DHC-6/36 Amdt 2

Side Seat Rail Attachment Rivets - Inspection and Modification  AD/DHC-6/37

Horizontal Stabiliser Rear Spar - Inspection  AD/DHC-6/38

Electric Power Cable Below Cockpit - Modification  AD/DHC-6/39

Wing Struts - Inspection and Modification  AD/DHC-6/40

Wing Tip Bonding - Modification  AD/DHC-6/41

Inboard Trailing Flap - Inspection and Modification  AD/DHC-6/42

Elevator Housing Assembly Lower Mounting Structure  AD/DHC-6/43 Amdt 1

Lower Wing Skin to Spar Rivets - Inspection  AD/DHC-6/44

Fuselage Side Frames Stns 218.125 and 219.525  AD/DHC-6/45 Amdt 1

Flap Operating Rod Assemblies and Control Rods  AD/DHC-6/46 Amdt 4

Propeller Reversing Interconnect Linkage - CANCELLED  AD/DHC-6/47

Introduction of Beta Range Test Switch  AD/DHC-6/48

Flight Control Rods  AD/DHC-6/49 Amdt 3

Main Landing Gear Legs - Inspection  AD/DHC-6/50

Engine Nacelle Lower Longerons  AD/DHC-6/51 Amdt 4

Windscreen Washer/De-Icing System - Discontinued Use of Isopropyl Alcohol AD/DHC-6/52

Tailplane Front and Rear Attachment Brackets - Inspection and Replacement -             AD/DHC-6/53

Side Folding Cabin Utility Seats - Inspection and Modification  AD/DHC-6/54 Amdt 2

Fuel Boost Pumps - Inspection, Replacement, Modification  AD/DHC-6/55

Landing Gear - Nose Wheel Steering Cables - Inspection and Modification         AD/DHC-6/56

Voltage Regulators - Inspection and Provision of Ground Wires  AD/DHC-6/57

Wing Struts Internal Beam Corrosion  AD/DHC-6/58

Tailplane Attachment Brackets/Adjacent Spar Structure - CANCELLED          AD/DHC-6/59

Wing Front Spar Attachment Adaptors  AD/DHC-6/60 Amdt 4

Wing Main Spar Lower Cap Angles  AD/DHC-6/61 Amdt 1

Elevator Quadrant Control Column and Elevator/Rudder Pulley Brackets          AD/DHC-6/62 Amdt 5

Gust Lock Assembly  AD/DHC-6/63

Elevator Pushrod Ball Ends  AD/DHC-6/64

Wing Strut Chafing  AD/DHC-6/65

Stabiliser Attachment Fittings  AD/DHC-6/66

Lower Skin and L/E Rivets at Front Spar  AD/DHC-6/67

Horizontal Stabiliser Centre Hinge Bracket - CANCELLED  AD/DHC-6/68

Corrosion Prevention and Control  AD/DHC-6/69 Amdt 1

Horizontal Stabiliser - Centre Hinge Bracket Flange  AD/DHC-6/70

Fuselage Station FS 239 Frame  AD/DHC-6/71

Corrosion Prevention and Control - 2  AD/DHC-6/72

Wing Spar Strut Lug  AD/DHC-6/73