Document ID: chunk:federal_register_of_legislation:F2008L04478:body:0:p1
Version: federal_register_of_legislation:F2008L04478
Segment Type: other
Provision Reference: 
Character Range: 0–3118

AIRWORTHINESS DIRECTIVE
On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/EC 120/16 and issues the following AD under subregulation 39.001(1) of CASR 1998.  The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Eurocopter EC 120 Series Helicopters
AD/EC 120/16 Amdt 1  Engine Controls - Twist Grip Assembly  13/2008

Applicability:  Eurocopter (formerly Eurocopter-France) EC 120 B helicopters, all serial numbers (S/N) fitted with:

                   -            Right Hand (RH) twist grip part number (P/N) C761A2024101 with S/N: 336 to 338 (inclusive), 342 to 353 (inclusive), 356 to 364 (inclusive) and 367 to 401 with no letter "V" marked on the lever base; and

                   -            P/N C761A2024102, P/N C761A2024103 or P/N C761A2024104 with S/N below 418 with no letter "V" marked on the lever base.

                   -            Left Hand (LH) twist grip P/N C761A2025102, P/N C761A2025103 or P/N C761A2025104 with S/N below 382 with no letter "V" marked on the lever base.
Requirement:       1. On helicopters having already accomplished EUROCOPTER EC120 Service Bulletin (SB) No. 76-005 Revision 0:

                   Identify the collective lever in accordance with paragraph 2.B.3. of EUROCOPTER EC 120 ASB No. 76A005 Revision 1.

                   2. On helicopters not having already accomplished EUROCOPTER EC120 SB
                   No. 76-005 Revision 0:

                     a. Remove the drive tube on:

                     RH twist grips assemblies P/N C761A2024101, P/N C761A2024103 or
                     P/N C761A2024104, S/N: 336 to 338 (inclusive), 342 to 353 (inclusive), 356 to 364 (inclusive), and 367 to 401(inclusive), having no letter "V" marked on the lever base; and

                     LH twist grips P/N C761A2025103 or P/N C761A2025104, S/N 371 to 381 (inclusive), having no letter "V" marked on the lever base in accordance with paragraph 2.B of EUROCOPTER EC120 SB No. 76-005 Revision 1.

                     b. In autorotation training, the manoeuvre must be carried out until the helicopter touches down (full autorotation).

                  c. Do not install a twist grip having P/N and S/N as per Requirement 2a of this AD on a helicopter, unless the drive tube has been replaced and the collective lever marked in accordance with paragraphs 2.B.2. and 2.B.3. of EUROCOPTER EC 120 ASB No. 76A005 Revision 1.

                3. Do not install on a helicopter twist grip assemblies listed below not having accomplished EUROCOPTER EC120 SB No. 76-005 Revision 1, unless the correct bonding strength of the