ASN Wikibase Occurrence # 385989
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| Date: | Thursday 26 April 2001 |
| Time: | 06:29 LT |
| Type: |  McDonnell Douglas DC-10-30 |
| Owner/operator: | Emery Worldwide Airlines, Inc. |
| Registration: | N8076U |
| MSN: | 45941 |
| Total airframe hrs: | 81335 hours |
| Engine model: | CFM International CFM56-2 |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Minor |
| Category: | Serious incident |
| Location: | Nashville, TN -
 United States of America
|
| Phase: | Landing |
| Nature: | Unknown |
| Departure airport: | Dayton-James Cox Dayton International Airport, OH (DAY/KDAY) |
| Nashville International Airport, TN (BNA/KBNA) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
According to the pilot, the freighter flight was normal in all aspects until the landing gear were extended for landing at destination. The left main landing gear, (LMLG) indicated "unsafe", and all attempts, using the emergency/abnormal checklists and telephone/radio-relayed communications with company maintenance, failed to extend it. An emergency, LMLG retracted landing was performed with minimal damage to the aircraft. Postcrash investigation revealed that company maintenance installed a one-way check valve in the LMLG extend hydraulic lines instead of a restricted flow valve. The wrongly installed valve had no factory specification or part number attached, and the tag reportedly removed from it at installation possessed the wrong factory specification number, and the correct vendor' s part number. The company maintenance manual states that upon completion of the valve installation, a leak and operational test of the MLG retract/extension system be performed. The valve installation mechanic and the company inspector both stated that the finished job was leak and "ops" tested.
Probable Cause: The failure of company maintenance personnel to install the correct hydraulic landing gear extension component, and the failure of company maintenance inspection personnel to comply with proper post maintenance test procedures, resulting in the impossibility of the LMLG to extend, and the subsequent LMLG up landing. A factor in the accident was the improper identification tag marking on the replacement component, and no marking on the component, itself.
Accident investigation:
 |
|
Sources:
NTSB MIA01IA129
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 05-Apr-2024 09:56 | ASN Update Bot | Added |
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