What is the aircraft Serial Number? If the serial number is 27-2505
through 27-3836, 27-3838 through 27-3943 and the aircraft is equipped
with dual 70 amp 12 volt Delco-Remy Alternators, the following alteration
will apply.
NOTE: If the aircraft has the dual Prestolite alternators
no deviations from the STC approved data is required.
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The swing arm called for in the STC instructions is the one used on the Delco alternator installation, therefore, purchasing a new one is not required.
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The Lycoming bracket P/N 77756 is still required. When using this alternator bracket a spacer, approximately 1" in length, will need to be fabricated. You will also need to purchase a longer bolt (AN6-36A).
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You may need to fabricate a support bracket between the starter and alternator to replace the one that is currently installed. This bracket is approximately 3 x .75 x .24 and is made out of a suitable steel.
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Placement of the heat shroud is moved slightly to allow more clearance between the shroud and alternator. One of the Knisley clamps (CS051) is shimmed to the cross-over to facilitate the relocating of the heat shroud.
-
The alternator belts should be P/N 37A19773-367.
NOTE: These alterations from the STC installation instructions are not
approved. Knisley Welding did not preform an installation conformity on
Aztec's with the early model Delco-Remy alternators. While the
deviations are minor, the deviations need to be addressed on the FAA
Form 337. A field approval of these deviations may be required.
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