Bombardier CL 600 2C10 N367CA

Summary

On 29 November 2016 at about 14:50 local time, a Bombardier CL 600 2C10 registered N367CA, operated by GoJet Airlines, LLC., was involved in an incident near Kansas, Illinois, United States. 73 people were on board and nobody was injured. The NTSB has published a probable cause for this accident; it is quoted in full below.

Date

29 November 2016 at 14:50

Classification

Incident

Location

Kansas, Illinois, United States

Coordinates

39.5028, -87.9300

Aircraft

Bombardier CL 600 2C10

Registration

N367CA

Category

Airplane

Year built

2002

Engines

2

Operator

GoJet Airlines, LLC.

Operating rule

Part 121: Air Carrier

Phase of flight

Not recorded

Route

Covington → Denver

Aircraft damage

Not recorded

Weather

Unk

Light

Day

NTSB number

ENG17IA006

Nobody was injured.

The probable cause of the uncontained No. 1 (left) engine failure was a separated high pressure turbine 2nd stage blade that failed due to a fatigue crack that originated below the blade platform from an area of corrosion.

Quoted verbatim from the NTSB record. This site does not paraphrase or interpret it.

Read the full NTSB narrative

The No. 1 engine experienced a catastrophic failure due to a separated high pressure turbine (HPT) 2nd stage blade. The separated blade subsequently damaged the HPT 2nd stage nozzle vanes, remaining HPT 2nd stage rotor blades, and all four stages of the low pressure turbine (LPT). Metallurgical analysis of the HPT 2nd stage blades that separated below the platform concluded that the first blade to separate failed due to a high cycle fatigue crack that originated from an area of corrosion on the convex side. Six additional blades separated below the blade platform at high cycle fatigue cracks that had transitioned to overload due to impact damage from the initial blade release. The remaining blades in the HPT 2nd stage separated above the blade platform due to overload consistent with secondary impact damage. Multiple blades that separated above the blade platform also had fatigue cracks present below the blade platform that originated from areas of corrosion. The corroded areas contained elements including: sulfur, sodium, potassium, and phosphorus, which are common corrosive elements. The source of the corrosive elements could not be identified. The engine water wash schedule was reviewed and according to GoJet Airlines, water washes are performed on their CF34-8C engines every 1,200 flight hours, or when engine trend data shows performance degradation. GE currently recommends water washing the engine at every -2A check, or about 1,600 flight hours. A GE service bulletin applicable to CF-348C engines is scheduled to be released in the first quarter of 2018 that increases the water wash interval to 2,000 flight hours or when engine trend data shows performance degradation.

Quoted verbatim from the NTSB record.