From The LNR Book of Knowledge

This Quest is no longer available

Source

Thank you for contacting Sony Online Entertainment In-Game Customer Service.

This is GM–Bonyamo. I read the incident and understand that you have some
query regarding the "Secrets of the Syren" quest.  Naiya'Nal, I want to inform
you that  the quest you are facing problem, had already removed from the game, 
so you won't be able to do this quest.  I suggest that you continue your further
quest which are in your journal.  

I hope this information proves helpful and clarifies your concern. 
In future, if you come across any in-game issue, please
feel free to contact us, we will be glad to assist you.

Thank you for playing Star Wars Galaxies and have a great day!

 May the Force be with you!

 Sincerely,
 GM-Bonyamo
 In-Game GM 
 Sony Online Entertainment

The Secrets of the Syren Quest is faction based, meaning it has different starting locations, but seems to follow the same general thread. I'm a Rebel Colonel and this guide will reflect the path of a Rebel with instructions for Imperials and Neutrals if they differ.

Man Down!

• Rebel: Veega Madish, Tyrena Cantina Corellia /way -5237 -2546
• Neutral: Tyla Jinn, Theed Cantina Naboo /way -5182 4258
• Imperial: Jevan Monsul, Bestine Cantina Tatooine /way -1401 -3675.

Step 1: Travel to the Co-ordinates on Rori, /way 0 2012, and find out what happened to the missing Pilot.

Step 2: At the above waypoint, there are 20 CL 54 'a strong mercanary'.

Step 3: Search the crash Site. Search the crash site for some kind of information.

Step 4: Go to /way -6 1998 and get a system update, and 'a spice sample' will be placed into your inventory.

Step 5: Return the spice sample back to the starting contact (eg Veega Madish for Rebels).

Step 6: After returning the spice to the starting contact, he sends you to speak with Doctor Vang. A new waypoint is added to your datapad for Rori. Travel to Narmle. Edvar Vang can be found in the Narmle medical Centre at /way -5108 -2202

Step 7: Apperantly Dr. Vang wants nothng to do with the spice sample, and tells you to take it his friend A new waypoint to Moxar Krieg on Tatooine has been added to your datapad.

Step 8: Travel to Mos Eisley and go to the waypoint in your datapad. Go inside the house and at approx /way 3293 -4540 you will get a quest update, and a datapad will be placed in your inventory.

More Than You Bargained For

• Rebel: Veega Madish, Tyrena Cantina Corellia /way -5237 -2546
• Neutral: Tyla Jinn, Theed Cantina Naboo, /way -5182 4258
• Imperial: Jevan Monsul, Bestine Cantina Tatooine, /way -1401 -3675.

Step 1: You are sent to speak with Kaila Min, Hotel in Narmle Rori, /way -5186 -2266. A waypoint is added to your datapad for "Pirates Last Known Location".

Step 2: Head to the location which is at /way -2970 947 on Rori.

Step 3: Warning: It's actually an ambush. You will be attacked first by six CL17 Black Sun Initiates. As soon as the last one dies, five CL19 Black Sun Smugglers will spawn. Again, as soon as they die, three CL21 Black Sun Minions will spawn.

Step 4: Once they are all dead, a Black Sun Member's Datapad will be placed in your inventory.

Step 5: The datapad will direct you to the Black Sun Pirate Base, on Rori /way 4846 -1084.

Step 6: After you arrive at the Black Sun's Pirate Base, you enter in a small dungeon. The dungeon is full of the same black sun mobs from the Ambush.The NPC you need to talk to is the white dot at the back named Tover Blackmoor /way 4695 -1129.

Step 7: After speaking with Tover, he will award you 5000 credits, 100 faction points (not sure for neutral), & a Shisa Draft Schematic.

Step 8: Return back to your contact (eg Veega Madish for Rebels), and you will begin the next stage of Quests, this ends part 2.