Incident · 2007-10-28
What the record says
- Event date
- 2007-10-28
- Event type
- Incident
- Aircraft
- BOEING 757-225 (N919UW)
- Operating rule
- Part 121
- Operator
- US AIRWAYS INC Operator named in NTSB report
- Operated by (per NTSB report)
- US AIRWAYS INC
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.
Source: NTSB case ENG08IA001Flight crew
Flight-crew details for this event aren't in the NTSB database extract we hold (its coverage starts with 2008 events) — a gap in our data, not an absence of crew.
Facts as the NTSB records them — GroundCheck adds no judgement. Preliminary records may be revised as the investigation proceeds.