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| Date: | Monday 17 May 2010 |
| Time: | 22:33 |
| Type: |  Boeing 747-47UF |
| Owner/operator: | Atlas Air |
| Registration: | N498MC |
| MSN: | 29259/1227 |
| Year of manufacture: | 1999 |
| Total airframe hrs: | 47281 hours |
| Engine model: | General Electric CF6-80C2BF5 |
| Fatalities: | Fatalities: 0 / Occupants: 3 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Miami International Airport, FL (MIA/KMIA) -
 United States of America
|
| Phase: | Approach |
| Nature: | Unknown |
| Departure airport: | Rio de Janeiro, FN (SBGL) |
| Miami International Airport, FL (MIA/KMIA) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
On May 17, 2010, an Atlas Air Cargo Boeing 747-400F, N498MC, lost a section of the left fore-flap while on approach to Miami International Airport (KMIA), Miami, Florida. The airplane was substantially damaged when the flap portion impacted the fuselage. There were no injuries to the flight crew and the airplane landed without further incident. The cargo flight originated from Rio de Janeiro-Galeão-Antonio Carlos Jobim International Airport (BGL), Rio de Janeiro, Brazil.
According to the operator, the flight crew heard and felt a large impact after 30 degree flaps was selected during the approach. Postflight inspection revealed that approximately twelve feet of the right wing inboard fore flap was missing and had caused substantial damage to the aft fuselage.
The separated section of the fore flap was recovered and examined. The examination revealed that a large portion of the enamel was missing from the fore flap attachment fitting of the carriage assembly and that there was a large amount of contamination and grease buildup around the lubrication fitting. Extensive corrosion byproducts covered up the lubrication passage in the attachment, which prevented passage of grease to the bearing, causing extensive corrosion in the bore and propagated by fatigue before final ductile separation.
Probable Cause: impact of the fore flap with the aft fuselage after fatigue failure of the right wing fore flap carriage assembly attachment fitting at position 6.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 19-Aug-2017 09:44 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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