FAA - emergency AD for 737 -6/7/800 series
 

FAA issues emergency airworthiness directive for 737 series 600, 700/&C, and 800.

Extract:
"Improperly torqued jam nuts on the elevator tab control rods could result in damage to the tab control rod. If both tab control rods are damaged, excessive freeplay in the tab control mechanism can occur, which
could result in elevator tab flutter. This condition, if not corrected, could result in loss of controllability of the airplane."

Full text at:

http://av-info.faa.gov/ad/PublishedADs/010951.pdf

you will need Adobe Acrobat.

any possibility of a connection with the silk air incident ?

SilkAir was a -300. This AD is for -700/-800.

Gladiator...you are correct..Silk Air was a 737-300 but AD's such as this still raise doubt....???