Document ID: chunk:federal_register_of_legislation:F2005L02062:body:0:p1
Version: federal_register_of_legislation:F2005L02062
Segment Type: other
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Character Range: 0–9391

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/ELECT/75 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.

Electrical Equipment
AD/ELECT/75 Amdt 1  TCM Magneto Impulse Coupling  9/2005

Applicability:    Teledyne Continental Motors (TCM) (formerly Bendix) magnetos that have a magneto part number (P/N) listed in Table 1, installed on Lycoming AEIO-540,
                  HIO-540, IO-540, O-540 and TIO-540 series engines:
                  Table 1
                      P/N                                                                                                                                                                                                                                                                                                                                                   Model           P/N                  Model
     10-51365-32  S6LN-21                                                                                                                                                                                                                                                                                                                                                   10-79020-18     S6LN-25
    10-51365-34   S6RN-21                                                                                                                                                                                                                                                                                                                                                   10-79020-19     S6RN-25
    10-51365-35   S6RN-21                                                                                                                                                                                                                                                                                                                                                   10-79020-118    S6LN-25P
    10-51365-39   S6LN-21                                                                                                                                                                                                                                                                                                                                                   10-79020-119    S6RN-25P
    10-51365-40   S6LN-21                                                                                                                                                                                                                                                                                                                                                   10-500556-101   S6RSC-25P
    10-51365-43   S6LN-21                                                                                                                                                                                                                                                                                                                                                   10-500556-901   S6RSC-25P S6RN-1225
    10-51365-47   S6RN-21                                                                                                                                                                                                                                                                                                                                                   10-349350-4     S6RN-1225
    10-51365-48   S6RN-21                                                                                                                                                                                                                                                                                                                                                   10-349350-5     S6LN-1225
    10-51365-54   S6LN-21                                                                                                                                                                                                                                                                                                                                                   10-349350-6     S6LN-1225
    10-51365-57   S6LN-21                                                                                                                                                                                                                                                                                                                                                   10-349350-7     S6LN-1227
    10-52350-19   S6RN-23                                                                                                                                                                                                                                                                                                                                                   10-349370-4     D6LN-2031
    10-52350-20   S6LN-23                                                                                                                                                                                                                                                                                                                                                   10-382560-11    D6LN-2031
    10-79020-6    S6LN-25                                                                                                                                                                                                                                                                                                                                                   10-382560-13    D6LN-3000
    10-79020-10   S6RN-25                                                                                                                                                                                                                                                                                                                                                   10-682560-11    D6LN-3000
    10-79020-11   S6LN-25                                                                                                                                                                                                                                                                                                                                                   10-682560-13    D6LN-3000
    10-79020-16   S6LN-25                                                                                                                                                                                                                                                                                                                                                   10-682560-131
    10-79020-17   S6LN-25
                  Note 1:  Table 1 is a partial reproduction of Table 1 from TCM Mandatory Service Bulletin (MSB) MSB645, dated 4 April 1994.
                  Note 2:  Lycoming AEIO- 540, HIO-540, IO-540, 0-540 and TIO-540 series engines are known to be installed on, but not limited to, aircraft manufactured by the Cessna Aircraft Company, Maule Aerospace Technology Corporation, Mooney Aircraft Corporation, The New Piper Aircraft Inc. and Raytheon Aircraft Company (Formerly Beech Aircraft Company).
Requirement:         1. Inspect the impulse coupling assembly for wear using paragraphs 1.2 through 1.4.5 of the Detailed Instructions of TCM MSB645.

                Installing a "Shower-of-Sparks" ignition system in place of a magneto system that has a riveted-impulse coupling assembly or a snap-ring impulse coupling assembly is optional terminating action for the repetitive inspection requirements.  More information on installing a "Shower-of-Sparks" ignition system may be found in TCM Service Information Letter SIL648, dated 18 October 1994.
                2. Replace any impulse coupling assembly that fails the inspection with a serviceable riveted or snap-ring impulse coupling assembly.  Paragraphs 2 through 2.6 of the Detailed Instructions of TCM MSB645 and TCM Service Bulletin 639 dated March 1993 contain information on replacing the impulse coupling assembly.
                3. If a snap-ring impulse coupling assembly is replaced with a riveted impulse coupling assembly, strike out the "A" on the magneto data plate.
             Note 3:  FAA AD 2005-12-06 Amdt 39-14122 refers.
Compliance:  For Requirement