- Denver plane engine fire consistent with metal fatigue in fan blade, say investigatorsThe Guardian
- NTSB preliminary investigation into United flight with exploding engine reveals fan blade damageFox Business
- Plane engine that caught fire on United Airlines flight over Denver has troubled historyNBC News
- Opinion: Plane parts are falling from the sky — is Boeing to blame?The Denver Post
- Damage to United Boeing 777 engine consistent with metal fatigue: NTSBReuters
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