# NTSB Incident ENG17IA026
> **BOEING 747 451** · 2017-06-07 · Tokyo, JA · NONE
## Event
- **NTSB number:** ENG17IA026
- **Event ID:** 20170607X22245
- **Type:** Incident
- **Date:** 2017-06-07
- **Location:** Tokyo, JA
- **Coordinates:** 35.771945, 140.392776
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 326
- **Total aboard:** 326
## Aircraft
- **Make:** BOEING
- **Model:** 747 451
- **Registration:** N668US
- **FAR Part:** 121
- **Engines:** 4
- **Damage:** —
## Conditions
- **Light:** NR
- **Weather:** Unk
## Probable cause

The PW4056 engine lost power due to the fatigue fracture of a 5th stage compressor blade.  The cause of the fatigue fracture could not be determined.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ENG17IA026) · AI Analytics · CC0 1.0*