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Boeing Begins Flight Testing UK Chinook Mk4

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    Qantas Flight Makes Emergency Landing in Melbourne

    Qantas flight QF-27 had to make an emergency landing in Melbourne, Australia, on November 6th.

    The Boeing 747-400 plane heading from Sydney, Australia, to Santiago, Chile, was diverted due to an engine problem.

    The plane landed uneventfully. All passengers and crew members remained unharmed.

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    Hull Breach in American Airlines Flight


    Click to view full size photo at Airliners.net
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    What: American Airlines Boeing 757-200 from Miami,FL to Boston,MA
    Where: Miami
    When: Oct 26th 2010
    Who: 154 passengers and 6 crew
    Why: A half hour after takeoff, the plane developed rapid decompression at 31,000 feet requiring oxygen masks, an emergency descent and a return to Miami.

    Maintenance found a one by two foot hole in the hull.

    George’s Point of View

    Maintenance, Maintenance, Maintenance!

    Even with AD Directives issued, this was still missed. Was there telltale evidence prior to this event that could have prevented endangering 154 passengers and six crew?

    The hole in the hull is not unprecedented. Sixteen months prior to flight AA-1640, Southwest Airlines (SWA) flight 2294, (another Boeing suffering a hole in the hull in July 13, 2009), the FAA has already issued Airworthiness Directive 2010-01-09 mandating inspection requirements. At that time, they ascribed the hull failure to a design fault: Fuselage skin failure due to preexisting fatigue at a chemically milled step.

    It’s an easy enough thing to visualize-picture slightly squeezing an empty cola can, then blowing into it; and repeating the process, over and over. In a soda can, it would not take the 20 years this plane has been flying for the stressed areas to develop a crease, and eventually crack.

    Not that a soda can is expected to sustain the significant pressures at 10,000+ feet, nor does it have the design flaw of chemical milling, nor is its skin made of single and double bonded layers. If it were, one could theoretically presume and anticipate metal fatigue to occur at the weakest location–the edges of where the metal is double-bonded.

    In the Southwest Airlines event, it was observed that the progression of metal fatigue tends to be higher at the borders between chemically milled and non-chemically milled bays.

    The inspection requirements in SB 737-53A1301 require inspections to detect cracks in the vulnerable areas (the chem-mill step) to avoid sudden fracture and failure of the fuselage skin panels.

    Did this plane undergo “repetitive external non-destructive inspections to detect cracks in the fuselage skin“?

    Carriers out there, when there are directives which indicate potential problems, pay attention!

    If not for the stellar performance of this flight crew, this plane would have been a statistic.

    Thank you, John D King for sending the links.

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    Copa Airlines Plane Suffers Hydraulic Leak After Landing In Nicaragua

    Copa Airlines flight CM-106 suffered a hydraulic leak on landing at Augusto C. Sandino International Airport in Managua, Nicaragua, on March 23rd.

    The incident happened when the Boeing 737-700 plane was coming from Panama City, Panama.

    The plane became disabled on the runway. All one hundred and twenty-one passengers and six crew members remained unharmed.

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    First Air Flight Makes Emergency Landing in Montreal

    First AirFirst Air flight 7F-866 had to return and make an emergency landing in Montreal, Canada, on September 19th.

    The Boeing 737-400 plane took off for Kuujjuaq, Canada, but had to turn back after a strong odor was noticed in the cabin and cockpit.

    The plane landed safely. All 69 people aboard remained unhurt.

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    Qatar Airways Flight Makes Emergency Landing in Djibouti

    Qatar Airways flight QR-1428 made an emergency landing in Djibouti, on July 24th.

    The Boeing 787-800 plane heading from Addis Ababa, Ethiopia, to Doha, Qatar, was diverted after the crew noticed a technical fault.

    The plane landed safely. All passengers and crew members remained unharmed.

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    United Airlines Flight Suffers Bird Strike Near Spokane International Airport

    United Airlines flight UA-255 suffered a bird strike in Spokane, Washington, on December 9th.

    The incident happened when the Boeing 737-900 plane flying from Denver, Colorado, was on approach to Spokane International Airport.

    The plane continued for a safe landing.

    The plane sustained damage to the tail and wings.

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