ENG06IA001 · Cessna Citation 650
Marshall & Ilsley Cessna Citation 650 · Incident: total loss of engine power (mechanical failure) en route
From General Mitchell International Airport (MKE) to Van Nuys Airport (VNY)
Event
- NTSB case
- ENG06IA001
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Incident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Completed
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- Unknown
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Cessna Citation 650
- Aircraft type
- Cessna CITATION 650
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N175DP
- Operator
- Marshall & Ilsley
- Onboard fatalities
- Unknown
- Route
- From General Mitchell International Airport (MKE), Milwaukee, WITo Van Nuys Airport (VNY), Van Nuys, CA
- Aircraft age
- Not recorded
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- En route · cruise
- First occurrenceThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Total loss of engine power (mechanical failure)
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Minor
Cause areas
- Manufacturer › Acft/equip, inadequate design
- Turbine assembly, casing › Failure
Approximate · Coordinates as recorded by the NTSB; no uncertainty radius is established.
NTSB narrative
The airplane was in cruise flight when the pilots heard a bang and the left engine lost power. The flight crew made a precautionary landing without incident. An examination of the left engine revealed a hole in the bottom of the cowling, and the LPT 3rd stage blades were broken. Metallurgical examination of the broken blades identified one that had fatigue progressions. By part number, the broken blades had previously been identified as having high stresses that could lead to the separation of the blade through the airfoil section. The interstage transition duct was bulged out around the LPT 3rd stage and had an almost 180 degree split in the bulged out section at the bottom of the duct. The metallurgical examination of the case and its material revealed that it conformed to engineering drawing requirements and material specifications.
Probable cause
The inadequate design of the engine's interstage transition duct that yielded after the LPT stage 3 blades had separated and allowed the uncontained release of turbine debris. A contributing factor was the separation of a turbine blade.
Verbatim NTSB analysis and probable cause from the NTSB dataset
Sources
NTSB record ENG06IA001
- Event ID
- 20071221X01980
- Case number
- ENG06IA001
- Dataset
- historical-pre2008
- Source SHA-256
- 89e2df6d848e7ab3b42e7d7c7a03ff403303057a26ca04c95b3ea67201c3ce74
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: b8e9462ee21657eb1a0175f631027f7c2c14170877a9586a911cd2070c394edc; retrieved 2026-09-22T05:18:39.854Z.