ASN Wikibase Occurrence # 31172
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Date: | Saturday 20 July 1996 |
Time: | 08:57 |
Type: | Mitsubishi MU-2B-36 |
Owner/operator: | Med Arizona Inc |
Registration: | N999FA |
MSN: | 676 |
Year of manufacture: | 1975 |
Total airframe hrs: | 8878 hours |
Fatalities: | Fatalities: 0 / Occupants: 1 |
Aircraft damage: | Destroyed |
Category: | Accident |
Location: | 2 miles from Scottsdale Municipal Airport, Scottsdale, Arizona -
United States of America
|
Phase: | Initial climb |
Nature: | Executive |
Departure airport: | Scottsdale Municipal Airport, Arizona (SCF/KSCF) |
Destination airport: | Phoenix Sky Harbor International Airport, Phoenix, Arizona (PHX/KPHX) |
Investigating agency: | NTSB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:On July 20, 1996, at 08:57 hours MST (Mountain Standard Time) a Mitsubishi MU-2B, N999FA, landed off the airport after a loss of power during the initial takeoff climb from the Scottsdale Municipal Airport, Scottsdale, Arizona. The airplane was subsequently destroyed by fire and the airline transport pilot was not injured. The airplane was being operated as a business flight under 14 CFR Part 91 when the accident occurred. The airplane was destined for the Phoenix Sky Harbor International Airport, Phoenix, Arizona. Visual meteorological conditions prevailed at the time.
Following an apparently normal take-off roll, the aircraft's right engine suffered an uncontained failure just after lift-off, while the undercarriage was retracting. After the loss of the engine, the aircraft would not climb and the pilot therefore elected to carry out a forced landing on a road about two miles from the airfield. After coming to rest, a post crash fire destroyed the aircraft.
The accident happened in daylight (08:57 MST) and in VMC. Wind 150 degrees/7 knots and temperature +95 degrees F. The airfield elevation is 1,508 feet.
The right engine exhibited evidence of an uncontained separation of the second stage turbine rotor disk. Examination of the disk fragments revealed a low cycle fatigue fracture mode. The fatigue initiated from multiple areas at and adjacent to the inside diameter bore surface near the aft side of the disk. According to the engine manufacturer, the multiple indication areas were associated with uninspectable size porosity and the primary carbides in the cast material. There were no material or casting defects detected on any of the fractures through the wheel.
The NTSB determined the probable cause of the accident was an uncontained failure of the second stage turbine wheel due to fatigue. Factors were: obstructions in the forced landing area and the inability of the aircraft to climb after the turbine wheel failure
Aircraft deemed to have been damaged beyond repair, and the registration N999FA was cancelled by the FAA on April 9 1997 as "destroyed"
Sources:
1. NTSB Identification: LAX96LA280 at
https://www.ntsb.gov/_layouts/ntsb.aviation/brief2.aspx?ev_id=20001208X06292&ntsbno=LAX96LA280&akey=1 2. FAA:
http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=999FA 3. [LINK NOT WORKING ANYMORE:http://www.baaa-acro.com/1996/archives/crash-of-a-mitsubishi-mu-2-marquise-in-scottsdale/]
Revision history:
Date/time | Contributor | Updates |
27-Sep-2008 01:00 |
ASN archive |
Added |
01-Aug-2009 07:47 |
harro |
Updated |
01-Aug-2009 07:47 |
harro |
Updated |
10-Sep-2013 06:34 |
wf |
Updated [Operator, Location, Departure airport, Destination airport, Source, Narrative] |
06-Mar-2016 22:52 |
Dr.John Smith |
Updated [Location, Nature, Departure airport, Destination airport, Source, Narrative] |
06-Mar-2016 22:55 |
Dr.John Smith |
Updated [Time, Narrative] |
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