Assalaamu'alaikum
In Surah Muzammil, verse 1 :Qulyaaaa Ayyuhal muzzammil. Is Ayyu read with leen? Like aeyyu?
Thanks.
Answer
Wa alaikum assalaam wa rahmatullahi wa barakaatuh.
In this case, there is a "nabr" or accent on the
because of the shaddah, and this 
prevents the from being lengthened. the shaddah and the emphasis which comes with the shaddah is clear in the recitation without the leen lengthening. Please see: http://www.abouttajweed.com/the-accent-in-recitation-of-the-glorious-qur-an/the-accent-in-recitation-of-the-glorious-quran-p-2.html
for more information.
You are most welcome.