Proper tire inflation or tailrotor vib

And check that the gel hasn't leaked out of the shimmy damper. I've had that before!

Thanks, mech. found valve stem damaged from the tow bar.

Tail Rotor De Bonding
 

I saw on this thread something regarding tail rotor issues, possibly with debonding.
can somebody point me in the right direction.
Many Thx.

Mmmmm ....

try here ....

http://www.pprune.org/rotorheads/419...k-harbour.html


:E

Thats why, but I thought somebody on this thread may have already had issues with tail rotors, prior to this incident.

Minor cracking in the root years ago that turned out to be nothing more than a butt joint in a sacrificial layer, not the actual structure of the blade itself. The butt joint area was modified so that operators didn't freak out about this line appearing on the blade root :)
That is the only issue I've seen with the tail rotor.

Nose wheel dampner
 

G'day Nooby, have you found a procedure and fluid spec for the shimmy dampner in the IETP? Or anywhere else? I asked AW tech rep ages ago and was never able to get an answer. We had a nose wheel that would not completly centre and stopped landing gear from being retracted. I now grease the nose gear swivel every 25 hrs and seems to be OK. Pilots were able to kick the tail rotor one time and get the nose assy to pop into the cam centering to get the gear up.
Just curious as to if there is a procedure to check the dampner fluid level available
Cheers
KC

Is nosewheel shimmy common on the 139?

I saw a quite extraordinarily vigorous nosewheel shimmy on a swift-taxying 139 a year or two ago. The pilot(s) soon quelled it by very apparently tromping on the brakes, but it was a very vigorous shimmy for a second or two.

Is there a maximum groundspeed for taxying? Is there an annunciator or audible warning for an exceedance of such a limit?

Mmmm...

.... Is there a maximum groundspeed for taxying?....

From the RFM ...<6400Kg G Wt Max Taxi speed 40 Kts BUT taxi above 20 Kts requires nose wheels lock to be 'locked'.

For A/C with 6400-6800kg gross wt max taxi speed (on paved sfc) 20 Kts. Taxi on grass prohibited.


... Is there an annunciator or audible warning for an exceedance of such a limit?...

Not that I know off.

The nose wheel can shimmy on the AW39, it happened to me last week taxiing back at 12 knots ground speed, I clipped an unseen change of surface and the nose wheel did just that. A little alarming, but a swift application of brake soon sorted it out. There is no warning that you are about to exceed the laid down limits, only the GS readout.

NLG Shimmy damper
 

KC
There is no procedure in the IETP for servicing the shimmy damper, its a workshop procedure in CMM 32-21-03 (Liebherr).

From un-controlled CMM

SUBTASK 32-21-03-410-011-A01
(11) Filling instructions for the Shimmy Damper
(a) Install the NLG Strut Assy vertically in the Tool P/N 58986A0000–01 Assembly rig.
(b) Apply the silicon oil (AK500000) to the Tool P/N 59502A0000–01 filler. Make sure that there is no
locked air in the filler.
(c) Install the filler to the lower filling port of the steering cuff (2–80).
(d) Apply 0.4–0.5 MPa (52–72.5 psi) compressed air to the filler.
(e) Fill the complete silicon oil volume of the filler to the lower filling port.
(f) Install the hexagon head bolt (1–720) and the washer (1–730) to the bleeding port. Torque
the hexagon head bolt (1–720) to 2 +1 Nm (1.47 +0.74 lbf.ft).
(g) Safety the hexagon head bolt (1–720) with the lock wire.
(h) Apply ARDROX 3302 to the hexagon head bolt (1–720).
(i) Remove the Tool P/N 59502A0000–01 filler.
(j) Install the hexagon head bolt (1–400) and the washer (1–410) to the filling port. Torque
the hexagon head bolt (1–400) to 2 +1 Nm (1.47 +0.74 lbf.ft).
(k) Safety the hexagon head bolt (1–400) with the lock wire.
(l) Apply ARDROX 3302 to the hexagon head bolt (1–400).

Depending on your company procedures etc you would have to get Agusta and local regulator approval to carry out this procedure as a maintenance task.
Cheers
DL

KiwiRotorWrench,

G'day, as droplead says.
Check your PM's

nose wheel shimmy
 

.........mmmmmmm ......... interesting. Will see if I can programme that in the sim next time I do a course.

G.

Helmet
 

What is the best helmet for the aw139 with NVG bracket, please??

:sad::sad:

Is anybody else out there flying at 6800kg?
If so, have you noticed any (extra) cracking, or is the airframe taking the extra weight?

noooby, Where do I start looking for the "extra"...? :E

Best regards
Aser

Mmmm ....

If there are any 'extra' airframe problems with ops to 6800 Kg ... I'm certainly not getting told about it ..... :eek:



:uhoh:

Now now Aser, play nice :ok:

I haven't heard of any issues either Spinwing, are you operating at 6800?

We've got the usual cracking above the fuel cell area, but you get that even if you always fly empty!
I'd also like to know if they have beefed up the structure on the AW149 as it is supposed to be rated to 8000kg! The latest picture I have of the grey one with orange stripes basically looks like a 139 with different engines (CT7) and a stretched fuselage (window in front of sliding door is now same size as the ones in the door). Agusta are keeping pretty quiet about it at the moment but did hint to me last year that they were aware of the need for more seating in the 139 and that a fuselage stretch was being looked at.

Mmmm ...

....... are you operating at 6800? ...

On some machines .... Yes.... :ok: