Shroud Missing on Turbofan Engine; in Flight!

AirTran B-717', 2010.

Actually, and with all respect.
The 717 incident you refer to is detailed directly below.
August 12, 2010:
An AirTran Airways Boeing 717-2BD (N981AT), flight FL807 heading from Indianapolis International Airport (IND) to Baltimore/Washington International Thurgood Marshall Airport (BWI) lost the left engine cover. The flight diverted to Dayton International Airport (DAY) in Ohio as a precaution.

There initially appeared a couple photos of the aircraft following the incident. However, Boeing is very keen in the reputation-management department, and those photos have now disappeared from the web.

The aircraft (N981AT) is now flying for Delta, on lease from Southwest. And, (at the moment of this writing) in the air and scheduled to arrive - Kansas City Intl. (MCI), Terminal B, Gate 58 @ 12:54(CDT)

Then


And, now

However, and again with high regard and respect to Norseman -
The initial photo above in #1 is an Airbus 320 N951LF, and to be more specific:

July 2004:
NTSB Identification: ATL04IA156
Scheduled 14 CFR Part 121: Air Carrier operation of Ryan International Airlines, Inc. (D.B.A. AirTran Airways) Aircraft: Airbus Industrie A320-233, registration: N951LF

Airbus has not been as aggressive as Boeing in the Reputation Management or cowling maintenance departments.

Apr 5th 2010:
Jetblue’s Airbus 320-200, (N535JB), as flight B6-507 from Newark, (EWR) to Fort Lauderdale, (FLL) dropped parts of the left hand engine's (V2527) cowling during the takeoff run from Newark's runway 22R. The crew continued takeoff, levelled off at 3000 feet and flew a right hand traffic pattern for a safe landing on runway 22L about 12 minutes after departure.


N535JB - in normal service


Then there was -
May 2004:
Iberia Airlines
Flight IB 432, an A320 - not sure which one at the moment - lost the engine cowl in flight about 15 minutes after takeoff. It returned safely to Madrid where the passengers were put aboard another aircraft and sent on their way.
And,
January 2000:
Airtours Airbus A320, reported possible rudder damage shortly after leaving Gatwick Airport.
Officials said, "Part of the engine cowling fell off during take-off and fell onto the runway at Gatwick.” The Airtours jet had taken off from Gatwick on route to Almeria, in southern Spain, when the incident occurred.