ASN Wikibase Occurrence # 138916
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| Date: | Wednesday 28 September 2011 |
| Time: | 17:15 |
| Type: |  Mitsubishi MU-2B-25 |
| Owner/operator: | Laurel Mountain Aviation Llc |
| Registration: | N344KL |
| MSN: | 257 |
| Year of manufacture: | 1973 |
| Total airframe hrs: | 6196 hours |
| Engine model: | Honeywell TPE331-6-251M |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Atlanta, GA -
 United States of America
|
| Phase: | Landing |
| Nature: | Executive |
| Departure airport: | Hunstville, AL (HSV) |
| Atlanta, GA (RYY) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot stated that after landing, the nose landing gear collapsed. Examination of the airplane nose strut down-lock installation revealed that the strut on the right side of the nose landing gear trunnion was installed incorrectly; the strut installed on the right was a left-sided strut. Incorrect installation of the strut could result in the bearing pulling loose from the pin on the right side of the trunnion, which could allow the nose landing gear to collapse.
A review of maintenance records revealed recent maintenance activity on the nose gear involving the strut. The design of the strut is common for the left and right. Both struts have the same base part number, and a distinguishing numerical suffix is added for left side and right side strut determination. If correctly installed, the numbers should be oriented facing outboard.
The original MU-2 Maintenance Manual did not address the installation or correct orientation of the strut. The manufacturer issued MU-2 Service Bulletin (SB) No. 200B, dated June 24, 1994, to address the orientation and adjustment. Service Bulletin 200B states on page 8 of 10 that the “Part Number may be visible in this (the) area from the out board sides (Inked P/N may be faded out).”
Probable Cause: The improper installation of the nose landing gear strut and subsequent collapse of the nose landing gear during landing.
Accident investigation:
 |
|
Sources:
NTSB
FAA register: https://www.ntsb.gov/aviationquery/brief.aspx?ev_id=20110929X22501&key=1
http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?NNumbertxt=N344KL
http://www.airport-data.com/aircraft/photo/000308632.html
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 03-Oct-2011 09:56 | Geno | Added |
| 08-Dec-2016 18:32 | wf | Updated [Destination airport, Damage] |
| 21-Dec-2016 19:26 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 27-Nov-2017 17:14 | ASN Update Bot | Updated [Operator, Other fatalities, Nature, Departure airport, Destination airport, Source, Narrative] |
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