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But I've been pushing down the whole time!!!!!

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  • But I've been pushing down the whole time!!!!!

    Oh, the ironing!

    A failure of the ELACable?

    Out-of-Control Takeoff Try by Allegiant Jet Spurs FAA Probe

    by Mary Schlangenstein and Alan Levin

    August 26, 2015 — 11:50 AM CDT

    Updated on August 26, 2015 — 1:47 PM CDT

    U.S. air-safety investigators are looking into a mechanical failure that caused the nose of an Allegiant Airlines jet to rise off the ground prematurely before takeoff, defying the crew’s attempts to push it down.

    Pilots abruptly halted their roll on the runway at 138 miles (222 kilometers) an hour to regain control of the Boeing Co. MD-83 in Las Vegas on Aug. 17, the Federal Aviation Administration said. Allegiant blamed a fault in the elevator, the part of the tail that helps an aircraft to climb or descend.

    “That is a very big deal,” John Goglia, a former member of the National Transportation Safety Board who worked as an airline mechanic, said in an interview. “At very minimum, they would have had control problems. In a worst-case scenario, they would have been unable to control it. It could have been a disaster.”

    Primary flight controls on airliners are so critical to safe operations that they must be designed to essentially never fail. Manufacturers such as Boeing must certify to the FAA that the odds of a malfunction involving the elevators and other flight controls are less than one in a billion.

    The loss-of-control issue last week also was reported to the NTSB, which investigates aircraft accidents. Allegiant, a unit of Allegiant Travel Co., inspected all its MD-80-type jets, which make up about 70 percent of the fleet, after the incident.

    “I don’t know that I have ever heard of one doing that,” John Cox, a former airline pilot who is now president of consultant Safety Operating Systems, said in a telephone interview. “That’s how rare it is.”

    Federal Requirements

    Because of the potential severity of a flight-control failure, federal regulations require that a second qualified mechanic inspect and sign off on any maintenance performed on the elevators, Goglia said. He worked on the MD-80 and its predecessor models for 30 years.

    The incident adds to safety issues raised at Allegiant, a Las Vegas-based carrier that focuses on flights to leisure destinations. The FAA opened an investigation last month into a plane getting so low on fuel that the pilot said he needed to make an emergency landing.

    Last week’s episode involved Flight 436, which was bound for Peoria, Illinois, with 158 passengers and six crew members.

    Began Liftoff

    The jet began to lift off from the runway before it was moving fast enough for a normal takeoff, and the front of the plane stayed up even as a pilot adjusted the controls in a way that should have kept the nosewheel on the runway, according to an incident report filed by the airline to the FAA.

    The pilots then aborted the takeoff, according to the FAA.

    Allegiant said an inspection found that a device that moves one of the plane’s two elevators had become disconnected. The plane was repaired and put back into service.

    All of the airline’s jets from the MD-80 family were checked out “to ensure the flight control systems in those aircraft were functioning properly before returning them into service,” said Kimberly Schaefer, an Allegiant spokeswoman. “All aircraft were found to be in working order.”

    A mechanical failure of a related system at the tail of another MD-83 led an Alaska Airline Group Inc. plane to crash into the Pacific Ocean north of Los Angeles in 2000, killing all 88 people aboard.
    Les règles de l'aviation de base découragent de longues périodes de dur tirer vers le haut.

  • #2
    MD-80 service from LAS to Peoria, IL?
    Les règles de l'aviation de base découragent de longues périodes de dur tirer vers le haut.


    • #3
      Strange, no mention of this on AV Herald.


      • #4
        Ah, now it is.

        Another damned nut not properly maintained. Not the jackscrew issue this time but you would think after Alaska 261 the importance of inspecting nuts and threads might sink in...


        • #5
          You can watch the same component degrade each day a little bit more and never catch the change for the worse. Mandated measurements and proper logging of the inspections are the only way. Remember that many of these rigs are in hell-holes that are hard to get into and that invites "pencil whipping" the reports. Nothing short a tag recovery system to ensure the inspections are accurate?
          Live, from a grassy knoll somewhere near you.


          • #6
            Indeed, it seems that tightening hardware is becoming a lost art:
            Be alert! America needs more lerts.

            Eric Law