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Unread 08-21-20, 11:06 AM
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SK 337-74 (MEL 24-02) 28V starter/battery solenoid replacement

Probably years late-to-need posting this, but for anyone fighting electrical gremlins and chooses to replace the 40+ year old contactors/solenoids, Cessna SK 337-74 provides for replacement of 14V and 28V starter and battery contactors (solenoids).

It looks like the modern versions of the PMA Lamar SkyTec contactors are:

Cessna P/N SkyTec P/N
S1577-1 STS-S24 (#07-03563) 28V Starter for Front/Rear
S1577-1 STS-A24 (#07-03567) 28V Ground/Aux Power
S1580-1 STS-M24 (#07-03565) 28V Battery/Master

One source: aircraftspruce.com (search for STS-S24)

Other info:
Lamar installation guidance
http://www.lamartech.com/solenoids---contactors.html
http://www.lamartech.com/files/128985429.pdf
Attached Files
File Type: pdf SK 337-74 (MEL 24-02).pdf (423.5 KB, 2060 views)
File Type: pdf Lamar Contactor Diode explanation.pdf (244.5 KB, 1229 views)
File Type: pdf Lamar Contactor PMASupplement11.pdf (229.7 KB, 1276 views)
File Type: pdf ST80001 Drawing and Instructions.pdf (130.8 KB, 1337 views)

Last edited by Learjetter : 08-21-20 at 11:48 AM. Reason: add links
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