AA737-800's

[BuffaloJoe]

Did AA receive all their orders for the 737-800 or are there some on the books yet to come?

 

[IORFA]

I want to say that there are around 70 left on order. Someone with better info will know for sure. I do know for sure that there are some left on order.

 

[MiAAmi]

Regarding the 737, whats up with the nose gear vibrating so much on take-off? Is this normal or extra wear and tear on the gear?

 

[mga707]

I want to say that there are around 70 left on order. Someone with better info will know for sure. I do know for sure that there are some left on order.

77 currently in the fleet with 47 left on the deferred order. At present the 47 are not scheduled for delivery until 2013-16.
By that time there could well be a 737 replacement in the works (797?).

 

[IORFA]

So is it just the 47 737's left and 4-5 777's left on order?

 

[mga707]

So is it just the 47 737's left and 4-5 777's left on order?

You are almost correct, sir. The AW&ST "Source Book 2007" says 9 777s on order, while jp shows only 7. Both agree on the 47 737s.

Bets on when the 787 order will come?

 

[eolesen]

Simple. No orders whatsoever until a pilot contract is approved.

That's been AMR's only real bargaining chip in the past, and (unlike Duhlta) there's no way they'll commit to purchasing new aircraft without knowing exactly how expensive it will be to crew them.

 

[IORFA]

Boeing website says 47 737's and 7 777's left on order.

 

[1AA]

Regarding the 737, whats up with the nose gear vibrating so much on take-off? Is this normal or extra wear and tear on the gear?

That is an easy one to answer. I have changed many 737 nose tires. Both due to vibrations. Some tires had little time and were pulled off prematurely due to vibrations. You ask why is this happening? Simple one word answer: OUTSOURCING!!
Our 737 tires are outsourced. We no longer overhaul our own tires. If the tires are properly balanced and recapped this would not be an issue. Out of balance wheel halves and out of round tires from bad recaps will cause vibrations. Although rarely vibration can be caused by a worn out torque link but this is not as commom as you might think.
Hope that answers your question.

 

[lpbrian]

AA has always sent out tires to be recapped. Triplett in Tulsa in this case. The probable reason is that the 737 has a fairly flimsy nosegear with small, thin nose wheels. A 757, by comparison has much beefier tires.

 

[star power]

AA has always sent out tires to be recapped. Triplett in Tulsa in this case. The probable reason is that the 737 has a fairly flimsy nosegear with small, thin nose wheels. A 757, by comparison has much beefier tires.

The b-738 has the similar wheel assembly as the B-707 and the B-727. it has a different composition of rubber which is softer than the B-707 and the B-727 tire. I think AA operates there B-738 tire pressure at a lower tire pressure which cause the tires to wear quicker than DL/Co/AS. but the main reason that the tire assembly get their out of roundness, is the flight crew. Then the left seater turns the tiller wheel harder with more taxi speed than require the nose tire will skid causing a flat spot causing a quicker out of roundness. This is what cause the vibration, which is translated though the nose gear assembly. The B-707-300 series and the B727-200 series have a heavier noes weight than the B-738, with this heavier nose gear weight the flight crew could make harder turns at higher speed on the harder composition rubber than the B-738. Keep the speed up, I bet maintenance love to change two nose tire assembly at the same time to get rid of the nose wheel vibration write-up that in the log book or at WN on the napkins if maintenance has time.