MINR · Boeing 737-200 · 1997-04-28 · CHICAGO, IL, USA
Event
NTSB number
CHI97IA117
Event ID
20001208X07675
Type
Incident
Date
1997-04-28
Location
CHICAGO, IL, USA
Injuries
Highest injury
MINR
Fatal
0
Serious
0
Minor
2
Uninjured
56
Total aboard
58
Aircraft
Make
Boeing
Model
737-200
Registration
N9063U
FAR Part
121
Engines
2
Damage
MINR
Conditions
Light
DAYL
Weather
VMC
Probable cause
inadequate nickel plating was applied to the compressor disk during the rework process at the operator's overhaul facility, which resulted in a brittle fracture in the disk and an uncontained engine failure. A factor was the operator's lack of written procedures and guidance for personnel on the NiCad plating line, along with their failure to supply a method of measuring the thickness of nickel applied.