NONE · BOEING 787 · 2024-05-14 · Singapore, OF, SN
Event
NTSB number
ENG24LA014
Event ID
20240515194260
Type
Incident
Date
2024-05-14
Location
Singapore, OF, SN
Coordinates
2.037942, 107.049743
Injuries
Highest injury
NONE
Fatal
0
Serious
0
Minor
0
Uninjured
210
Total aboard
210
Aircraft
Make
BOEING
Model
787
Registration
N27957
FAR Part
121
Engines
2
Damage
MINR
Conditions
Light
NITE
Weather
VMC
Probable cause
The uncontained left engine failure was caused by the failure and liberation of the HPT stage 1 aft blade retainer as a result of a fatigue crack in the upper collet radius that originated from a surface connected cluster of Oxide/Carbonitride/Nitride/Carbide (OCNC) particles. Contributing to the failure of the HPT stage 1 aft blade retainer was an unknown material behavior unique to OCNC clusters in Rene 65 material that are surface connected in highly stressed material that may result in a localized reduction of material fatigue life capability.