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Forum: Tech Log

17th Aug 2013, 22:35

Replies: 1,033

UPS cargo crash near Birmingham AL

Views: 503,427

Posted By FIRESYSOK

Are you saying it would be normal to allow the...

Are you saying it would be normal to allow the automatics to fly the airplane into the ground?

I'm sorry, I'm not sure I understand.

Forum: Tech Log

17th Aug 2013, 22:10

Replies: 1,033

UPS cargo crash near Birmingham AL

Views: 503,427

Posted By FIRESYSOK

The NTSB has also indicated that: "The...

The NTSB has also indicated that:

"The autopilot was engaged until last second of recorded data"

Assuming, and again, assuming that the recorded data ended at or very close to impact, this info...

Forum: Tech Log

17th Aug 2013, 22:02

Replies: 1,033

UPS cargo crash near Birmingham AL

Views: 503,427

Posted By FIRESYSOK

Even if LNAV-only minima are published, most...

Even if LNAV-only minima are published, most airlines would still calculate and use a constant-descent profile. Dive and drive is old news.

If you arrive at the DDA and don't see anything, the...

Forum: Tech Log

17th Aug 2013, 17:42

Replies: 1,033

UPS cargo crash near Birmingham AL

Views: 503,427

Posted By FIRESYSOK

The 50' addition to MDA is for CANPA-type...

The 50' addition to MDA is for CANPA-type procedures only.

In a dive-and-drive procedure it is not needed because the aircraft is already level.

In a constant-descent procedure it is needed...

Forum: Tech Log

17th Aug 2013, 17:19

Replies: 1,033

UPS cargo crash near Birmingham AL

Views: 503,427

Posted By FIRESYSOK

Check FAR 91.175: What you're missing...

Check FAR 91.175:

What you're missing is that the *effective* MDA is actually the DDA (Derived Decision Altitude) which is MDA + 50'.

Let's say the MDA is 500' baro. Add 50' for a new DDA...

Forum: Tech Log

17th Aug 2013, 16:36

Replies: 1,033

UPS cargo crash near Birmingham AL

Views: 503,427

Posted By FIRESYSOK

You've forgotten one scenario. In my company...

You've forgotten one scenario. In my company (also allowed by FAA), we are permitted to descend below MDA with *only* approach lights as reference, but *only* if the plane is in a position to...

Forum: Tech Log

17th Aug 2013, 16:00

Replies: 1,033

UPS cargo crash near Birmingham AL

Views: 503,427

Posted By FIRESYSOK

Setting the MDA in the altitude window has been...

Setting the MDA in the altitude window has been implicated in a couple of incidents. While is seems sensible to the dive-and-drive camp, a pilot would not desire the aircraft to level during a...

Forum: Tech Log

15th Aug 2013, 11:37

Replies: 1,033

UPS cargo crash near Birmingham AL

Views: 503,427

Posted By FIRESYSOK

Referencing the 'Sooeet' vertical path someone...

Referencing the 'Sooeet' vertical path someone posted above:

This was not an ILS. It is NOT a good analysis. In fact, it is almost completely irrelevant and actually looks quite reasonable for a...

Forum: Tech Log

15th Aug 2013, 09:09

Replies: 1,033

UPS cargo crash near Birmingham AL

Views: 503,427

Posted By FIRESYSOK

I would think most airlines are using...

I would think most airlines are using constant-rate descents on non-precision approaches. Most charts in the US have a ROD table based on ground speed whereby you figure an initial descent rate and...

Forum: Tech Log

14th Aug 2013, 16:59

Replies: 1,033

UPS cargo crash near Birmingham AL

Views: 503,427

Posted By FIRESYSOK

It could also mean they impacted trees, engines...

It could also mean they impacted trees, engines surged as they failed, dropping internal/external parts along the remainder of the flight path.

Anything is possible, but there is a photo floating...

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