Date:	04-AUG-2008
Time:	05:45
Type:	Canadair CL-600-2B19 Regional Jet CRJ-200ER
Owner/operator:	US Airways, opb Air Wisconsin
Registration:	N422AW
MSN:	7341
Fatalities:	Fatalities: 0 / Occupants: 53
Other fatalities:	0
Aircraft damage:	Minor
Location:	en route -   United States of America
Phase:	En route
Nature:	Passenger - Scheduled
Departure airport:
Destination airport:	Charlotte Douglas International Airport, NC (CLT)

Narrative:
US Airways flight 4099, a CRJ-200ER, lost part of its right engine upper fan cowl while in flight at approximately 11,000 feet. The flight continued to its intended destination and landed without further incident at Charlotte Douglas International Airport, North Carolina,
about 06:30. The pilot, copilot, flight attendant, and 50 passengers on board were not injured; the airplane sustained minor damage, including damage to the left and right horizontal stabilizer and the fuselage.
The Safety Board’s investigation revealed that the right engine upper fan cowl latches were not properly fastened following engine maintenance performed the night before the incident, resulting in part of the engine fan cowl separating from the airplane during flight.

NTSB

Safety recommendation A-08-79 issued 10 October 2008 by NTSB to FAA
Safety recommendation A-08-80 issued 10 October 2008 by NTSB to FAA
Safety recommendation A-08-81 issued 10 October 2008 by NTSB to FAA
Safety recommendation A-08-82 issued 10 October 2008 by NTSB to FAA

Photo of N422AW courtesy AirHistory.net

Date/time	Contributor	Updates
19-Oct-2016 16:35	harro	Added