# NTSB Incident ENG08IA001
> **BOEING 757-225** · 2007-10-28 · Charlotte, NC, USA · NONE
## Event
- **NTSB number:** ENG08IA001
- **Event ID:** 20081219X65251
- **Type:** Incident
- **Date:** 2007-10-28
- **Location:** Charlotte, NC, USA
- **Coordinates:** 35.208984, -80.952576
## Injuries
- **Highest injury:** NONE
- **Fatal:** 0
- **Serious:** 0
- **Minor:** 0
- **Uninjured:** 0
- **Total aboard:** 0
## Aircraft
- **Make:** BOEING
- **Model:** 757-225
- **Registration:** N919UW
- **FAR Part:** 121
- **Engines:** 2
- **Damage:** MINR
## Conditions
- **Light:** NR
- **Weather:** Unk
## Probable cause

The truck beam fracture initiated by fatigue and stress corrosion cracking from pits that were present on the ID surface of the truck beam, under the protective finishes.  Crack propagation occurred by alternating modes of stress corrosion cracking and fatigue until final fracture occurred by ultimate ductile separation. The condition of the surface finishes and base metal at the fracture initiation area indicated that the pitting was present before the last application of cadmium plating and primer, rather than the result of corrosion since the last overhaul. The observed pitting appeared to be remnants of incomplete corrosion removal during the last overhaul.

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*Source: [NTSB CAROL](https://data.ntsb.gov/carol-main-public/basic-search?source=ntsb&type=event&ntsb_number=ENG08IA001) · AI Analytics · CC0 1.0*