Agusta AW139 Rotor Brake

[anto9293]

Hi,

I'm a french student currently working on the AW139 Rotor Brake for a study for my university.

I woud need your help in order to get documents on the AW139 Rotor Brake...

Is anyone able to provide me some links or documents related to the Rotor Brake system of this aircraft ?

Thank you for your help.

[Non-PC Plod]

Did you try asking Agusta? The documents are probably copyright, so you should ask permission to use them for commercial or academic purposes.

[anto9293]

I already tried without any reply from them...

Any idea to contact them ?

Thx

[Non-PC Plod]

If you PM me, with details of exactly what information you need and what you are going to do with it, I will try to pass it on to someone who can help you. Whether or not the company allows it, I can't guarantee!

[MOSTAFA]

Quite possibly anto has never heard of private messages

[Hot and Hi]

The AW139 rotor brake system allows rapid deceleration of the rotor after engine shut down. The rotor brake is also designed to allow for parking the rotor for up to 8hrs. The rotor brake control logic only allows Rotor Brake operations with engines shut down as automatic removal of pressure and caliper travel DOWN are activated for any other conditions (ie. one engine in ground idle).

The Rotor Brake consists of disc type braking, operating lever, tubing and fittings required for the installation. The brake caliper is automatically disengaged from the disc when the engines are running in flight mode. The caliper automatically engages with the disc when the aircraft is on the ground and the engines are shut down.

The rotor brake operation is indicated by activation of the ROTOR BRAKE ON advisory message on the CAS. Malfunctions of the system are indicated by caution messages on the CAS.

The complete Flight Operations Manual for the AW139 is available on avialogs.com (http://www.avialogs.com/index.php/en/aircraft/italy/agusta/aw139/2257todo.html). You can view individual pages for free. Against a once off fee of USD 10 you can download the full manual in pdf format (25 MB), and any other manuals available from the Avialogs archives.

[manriman]

Hi, does any one have information on the negative impact of the use of rotor brake in the main rotor components? My company is investigating an incident where damage to the rotating scissors flanges housings and attachments was found in a post-flight inspection, and they suspect the use of rotor brake could have been the cause. Thanks.

[Sir Korsky]

was the brake activated above 40% NR? Emergency use only is permitted above 40% up to 100% NR. The caliper moves up or down very quickly when making OFF/IDLE selections on the engine mode switches.

[manriman]

Rotor brake was activated below 40%. For now my company has decided not to use the brake, till Leonardo gives us some feedback.

[noooby]

Coming from the O&G side of things where every flight ended with the use of the rotor brake, I've never heard of normal application of the rotor brake causing damage to any components. Not saying it can't but in the company I worked for, with thousands of hours and tens of thousands of rotor brake applications on the AW139, it never damaged the components.

Now if your scissor bushings were allowed to wear beyond limits.... Well that could possibly damage something.

I guess Leonardo will let you know.

[Encyclo]

On the Bell side, subject ASB requires check of maximum pressure of brake master cylinder. If set too high, will damage the bevel gear/MGB even if applied at the proper M/R RPM.

Fly Safe, Always :ok: