Israel Aircraft Industries 1124 incident near Nantucket, Massachusetts, September 26, 1999
On September 26, 1999 at about 3:03 pm local time, a Israel Aircraft Industries 1124, registered N666K, suffered minor damage in an incident near Nantucket, Massachusetts. It was a personal flight under general aviation rules (Part 91). No one was hurt; 4 people were on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
A fractured turbine wheel.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- September 26, 1999 · about 3:03 pm local time
- Place
- Nantucket, Massachusetts
- Type
- Incident
- Injuries
- No one was hurt; 4 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Israel Aircraft Industries 1124 · all 1124s on the register
- Registration
- N666K · no longer on the register · serial 316
- Damage
- Minor damage
- Flight
- Personal flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
While in a climb after departure, the left engine failed. All procedures were accomplished to secure the engine and the airplane landed uneventfully. Examination of the airplane revealed extensive damage to the left engine nacelle and turbine section. The first stage low pressure turbine rotor disk was found separated from the low-pressure turbine shaft, and had penetrated the inner stage transition liner. The engine was removed from the airplane and disassembled. The disassembly revealed the first stage low-pressure turbine (LPT) had a piece of the web and rim, missing outboard of the curvic coupling. Metallurgical examination of the ruptured first stage LPT disk revealed a high cycle fatigue failure that originated from the subsurface location. The disk's dimensions adjacent to the fracture and the disk's material properties conformed to engineering specifications.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
Pilot
- Certificate: commercial pilot
- Ratings: multi-engine land; single-engine land; instrument: airplane
- Flight time: 6,500 as pilot in command
- Medical certificate: Class 3 (valid medical--w/ waivers/lim.)
- Seat: left
The aircraft
- Airframe total time: 9,635 hours
- Last inspection: approved inspection programme, September 15, 1999; 10 hours since
- Maximum gross weight: 22,650 lb
- Seats: 10
- Landing gear: retractable
- Engine: Garrett TFE-731-3-1G (turbojet); 0 hours total
The flight
- Departed from: ACK Nantucket MA at 3:00 pm
- Destination: GAI Gaithersburg MD
- Flight plan: IFR
- Runway 0
- A second pilot was aboard
Weather at the time
- Light: daylight
- Wind: from 040° at 12 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 64°F (18°C), dew point 54°F (12°C)
- Altimeter: 30.00 inHg
- Observation at 2:53 pm from ACK, 2 miles away
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Crew | 2 | |||
| Passengers | 2 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.