Alan
Quote from Iranian website '3 of Qeshm Air's aircraft, registration the Iranians have taken up EP-FQT, EP-FQU, EP-FQX'
'EY-571 is single RJ85, with serial number 2363, was manufactured in 1999.'
'EY-571 RJ-100 with serial number 3374 was built in 2000.'
'EY-574 RJ-100 and possibly (unconfirmed) with serial number 3375 was built in 2000.'
'EY-573 RJ-100 is the fourth registered which probably has not been confirmed yet. If approved for this aircraft has the serial number is 3320 and construction in 1997.'
EY-571 was noted flying up until 10/8/14, no others have been noted recently
You have c/n 3374 as EY-572 in db which explains the above double entry and EY-574 is rptd on Airliners.net as c/n 3375, but which is now which EP-FQ? is unknown but hexes ought to be as follows
731A34,EP-FQT
731A35,EP-FQU
731A38,EP-FQX
It appears from your email that one of them (possibly EP-FQX reported flying 14/8/14) is miscoding and was on a technical flight (QSM9100) probably explains the low altitude and speed.
X