NONE · BOEING 757-222 · 2011-09-26 · Denver, CO, USA
Event
NTSB number
ENG11IA051
Event ID
20110927X91721
Type
Incident
Date
2011-09-26
Location
Denver, CO, USA
Coordinates
39.749824, -104.999977
Injuries
Highest injury
NONE
Fatal
0
Serious
0
Minor
0
Uninjured
185
Total aboard
185
Aircraft
Make
BOEING
Model
757-222
Registration
N526UA
FAR Part
121
Engines
2
Damage
MINR
Conditions
Light
—
Weather
—
Probable cause
**This probable cause was modified on 4/5/2012. Please see the public docket for this accident to view the original probable cause.** The initial damage to the fan blades was caused by the ingestion of a Red-Tailed Hawk that caused one or more fan blades to fracture, striking the fan case and causing it to bulge. The initial fan blade fragment release impacted and damaged other passing fan blades generating various sized blades fragments. Some of these blade fragments were propelled forward of the fan case by passing fan blades and were reingested, creating a cascading effect of collateral impact damage to the other fan blades, the fan case, and the inlet cowl.