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A109SP preflight check

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A109SP preflight check

Old 19th May 2020, 10:58
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Join Date: Dec 2019
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A109SP preflight check

If there is anyone familiar with this type I'm looking for point 39 of pre-flight check saying :
39. Engine oil filter impending bypass indicator - check for correct indication (red pop up indicator not in sight ) - where the f...k it is ? there nothing in maintenance manual nor flight manual or I'm looking wrong .

The second question - where I can find how long does parking brake quarantee wheels locked after shut-down .

Thank you for any help
CHRPIL1 is offline  
Old 20th May 2020, 04:03
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The arrow in the first figure shows the location. For further details, check the second figure.

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Old 20th May 2020, 06:30
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Join Date: Sep 2002
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where I can find how long does parking brake quarantee wheels locked after shut-down
No guarantees on this one. If you have a good accumulator, they will hold long enough for you to walk your passengers into the terminal and have a coffee. Then run back out to stop it rolling backwards - without brake pressure.

A friend had this happen to him, and he got to the aircraft just as it started rolling. He put his foot in front to the wheel to stop it rolling. It took 4 weeks for his broken ankle to heal.
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Old 20th May 2020, 07:51
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Stick your wallet behind/front of wheels......
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Old 20th May 2020, 09:30
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I donít fly the SP but Iíve got around 3,000 hours on the 109S. As already stated, parking brake ďunreliabilityĒ does vary from airframe to airframe on the 109 series. It's one of this aircraftís dirty tricks, so itís always best to chock a main wheel. If you come back to the aircraft and the wheel is leaning on the chock, donít pull the chock out! Silly system, tricky if youíre single pilot with no ground crew to remove and stow the chock once youíve started the aircraft and pumped up the accumulator. If possible, borrow a chock that can be left behind and park nose up slope, so you can taxi forwards.....or come back for your own forgotten chock later!

BTW, for similar reasons, NEVER leave the rotor brake lever in the ON position. Stop the rotors then move the lever to the off position. If you donít, one day you might start the aircraft with the brake selected on and because the pressure will have bled away, it will provide no resistance until the hydraulics rapidly pump up...... and then it gets very smokey and very expensive very quickly. I know of two unfortunate 109 pilots who did this. It cost one of them his job and it was his first day! Itís easily done if youíre used to aircraft with a proper rotor brake system. Why the manufacturers never put an interlock on the system to prevent the engine starting with the rotor brake lever on is difficult to fathom (unless they saw common sense and there is one on the SP, of course Iím talking slightly beyond my knowledge base). Even the military Gazelle had a stout piece of wire across the throttle lever to prevent it being advanced with the rotor brake lever in the on position!
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