Document ID: chunk:federal_register_of_legislation:F2007L01504:body:0:p1
Version: federal_register_of_legislation:F2007L01504
Segment Type: other
Provision Reference: 
Character Range: 0–3192

AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (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 AS 355 (Twin Ecureuil) Series Helicopters
AD/AS 355/96  Main & Tail Rotors Servo Controls  7/2007 TX

Applicability:  EUROCOPTER helicopters models - AS 355 E, F, F1, F2 and N, equipped with GOODRICH main rotor servo-controls and tail rotor servo-controls with no letter "C" marked in the inspection box of the servo-control identification plate, and with the following Part Numbers (P/N) and Serial Numbers (S/N):

                - Main rotor servo-controls

                   P/N SC5083 with S/N 270M, 272M, 409M, 423M, 452M or 1573

                   P/N SC5083-1 with S/N from 2902 to 2921, inclusive

                   P/N SC5084 with S/N 30, 84, 104, 186, 438, 575 or 695

                   P/N SC5084-1 with S/N from 1462 to 1481, inclusive.

                And

                - Tail rotor servo-controls:

                   P/N SC5072 with serial number 222M, 306M or 309.
Requirement:       1. Verify the P/N and S/N of the main rotor and tail rotor servo-controls in accordance with paragraph 1.E.2. of EUROCOPTER Alert Service Bulletin (ASB) No. 01.00.53 Revision 1 or later NAA approved revision.

                   Instead of inspecting the rotorcraft, a review of the helicopter maintenance records along with any other applicable data (rotorcraft logbook, Components list, etc...) is acceptable if each P/N and S/N can be positively determined from that review.

                   2. When a servo-control whose P/N and S/N are listed in the applicability section of this AD, is identified:

                     a. Check thoroughly that no "hard point" exists in the flight controls.

                     b. If any "hard point" is detected in the flight controls, replace the defective servo-control(s) as instructed in paragraph 2.B. of EUROCOPTER ASB
                     No. 01.00.53 Revision 1 or later NAA approved revision.

                  c. Replace all servo-controls that are identified in the applicability section of this AD, as instructed in paragraph 2.B. of EUROCOPTER ASB
                  No. 01.00.53 Revision 1 or later NAA approved revision.

                3. Do not install rotors servocontrols whose P/N and S/N are listed in the applicability section of this AD, on any EUROCOPTER AS 355 helicopter unless they have been previously returned to conformity by the equipment manufacturer as indicated in paragraph 2. of EUROCOPTER ASB No. 01.00.53 Revision 1 or later NAA approved revision.

             Note:  EASA Emergency AD 2007-0141-E