73-07-04 BENDIX ELECTRICAL COMPONENTS DIVISION: Amdt. 39-1611 as amended by Amendment 39-1731. Applies to all Bendix Electrical Components Division of the Bendix Corp. (Bendix Scintilla) S4LN or S4RN, S6LN or S6RN and S8LN or S8RN magnetos with series numbers -20 through -26, -200 through -206, -600 through -604 and -1200 through -1227 except the following.
1. Magnetos identified with the Bendix Blue name plate (Bendix remanufactured magnetos) having serial No. 231001 or higher.
2. Magnetos identified with the Bendix Red name plate (new magnetos) having a serial number with the prefix "A" and No. 16058 or higher.
Compliance required as indicated after the effective date of this AD unless previously accomplished.
To prevent failure of these magnetos due to malfunction or failure of the ignition coil or rotating magnet, accomplish the following:
a. On magnetos having 1,800 or less hours in service since new or last overhaul on the effective date of this AD, accomplish paragraph "d" before accumulation of 2,000 hours in service.
b. On magnetos having more than 1,800 hours in service since new or last overhaul, accomplish paragraph "d" within the next 200 hours service after the effective date of this AD.
c. Magnetos whose time in service since new or last overhaul is unknown will be assumed to have a total of 1,800 hours minimum and thus fall within the requirements of paragraph (b).
d. Identify magnetos per instructions contained in Bendix Electrical Components Division Service Bulletin No. 560, dated August 1972 or later. Magnetos having ignition coils as described in paragraph A, or rotating magnets as described in paragraph B or shown in figure 2 of Bendix Electrical Components Division's Service Bulletin No. 560, dated August 1972 or later, must have these components removed and replaced with serviceable parts as listed in the applicable Bendix Electrical Components Division Service Parts List, numbered and dated as follows or subsequent:
Magneto Model
Parts List Designation
Parts List
Date
S4LN-20 series (ignition coil no. 10-160886 or subsequent).
L-227-9
December 1963
S6LN-20 series (ignition coil no. 10-160886 or subsequent).
L-223-11
October 1963
S-200 series (ignition coil no. 10-160887 or subsequent).
L-528-3
October 1963
S-600 series (magnet rotor only)
L-552-3
December 1964
S-1200 series (ignition coil only)
L-608-3
September 1971
e. Upon completion of paragraph d, identify each magneto as follows:
S-20, S-200, and S-600 series magnetos - Metal stamp .010 deep maximum the letter "A" 3/16 inches high, midway and centered between the timing plug boss and the curved surface at the rear of distributor housing.
S-1200 series magnetos - Metal stamp .010 deep maximum the letter "A" 3/16 inches high, centered between the timing plug boss and data plate, adjacent to the magneto housing rib.
Amendment 39-1611 became effective April 2, 1973.
This amendment 39-1731 becomes effective October 11, 1973.