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The Mad Dog “Growl” –April / May 2006 Page 1 - Delta Virtual Airlines

The Mad Dog “Growl” –April / May 2006 Page 1 - Delta Virtual Airlines

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Training Info From the Pro<br />

By: Larry Foltran<br />

Terry and I were surprised to receive a very<br />

unexpected e-mail in April (Terry actually received it,<br />

but he forwarded it to me ☺). <strong>The</strong> note came from<br />

Mr. R. Winston Whitlock Jr, MD-88/90 Flight<br />

Training Procedures Instructor for <strong>Delta</strong> Air Lines, in<br />

response to a recent Water Cooler Post. After<br />

receiving the go ahead from Terry, I decided to post<br />

Mr. Whitlock’s insight in the newsletter. I’m sure<br />

you’ll find it as educational as I did.<br />

In the <strong>Mad</strong> <strong>Dog</strong>, the easiest way to execute a<br />

manual descent, rather than the FMS is to use<br />

vertical speed. When given the new altitude use the<br />

pitch wheel, which is always armed. Slowly pitch the<br />

a/c to about 1500-2000FPM and let the a/c descend<br />

for passenger comfort. You don't want to float them<br />

in the aisles. FMS is great, especially if the area is<br />

busy (NE corridor) but I prefer manual descents.<br />

<strong>The</strong> FMS always wants to use the most economical<br />

airspeed V/S combo which might not be what ATC<br />

wants. Long cruise descents or crossing restrictions<br />

known in advance, fine but manual descents give<br />

me better control.<br />

<strong>The</strong> autothrottles will reduce power to maintain the<br />

desired V/S. <strong>The</strong>n push IAS which will "snapshot"<br />

the current airspeed into the former V/S window.<br />

<strong>The</strong> throttles should go to CLMP. <strong>The</strong> a/c will<br />

descend at the current cruise airspeed and with the<br />

throttles in CLMP (computer lockout manual power)<br />

you can then change your rate of descent with the<br />

throttles. Bring the throttles back to idle and watch<br />

the "green banana" on the nav display. Using the<br />

CLMPed throttles, put the banana about 5 miles shy<br />

of the E/D point (end of descent) which will allow you<br />

to get down a little early and then slow down.<br />

Be sure to update your command speed to whatever<br />

speed you want the A/C to assume when it levels off.<br />

As you approach your new altitude (usually about<br />

2000 feet prior) either use IAS to reduce your<br />

airspeed or press V/S and reduce the vertical speed<br />

component. At ALT CAP, the a/c will resume the<br />

command speed selected.<br />

If descending to below 10,000 feet, most pilots will<br />

use IAS and V/S together. If descending in a<br />

manual (not fms) descent at cruise speed (IAS), set<br />

240K in the command window. This gives you a<br />

10K buffer. You can always speed up a bit. At<br />

about 13,000 feet, start slowing the aircraft down<br />

using IAS. ONLY if you might descend below<br />

10,000 at above 250KIAS, then switch to V/S or hit<br />

altitude hold to keep from getting a "write down this<br />

phone number" from ATC.<br />

As you approach the airport, your goal is 10,000<br />

AGL, 30 miles and 250KIAS. Slats can be extended<br />

at 280KIAS as well as FLAPS 11. Spoilers are NOT<br />

authorized with flaps or gear extended.<br />

Most ATC will not let you slow down until you are<br />

within 5 miles downwind. I will extend slats just to<br />

help with the drag as I get within 15 miles and need<br />

to come down and slow down. Once I get below<br />

10,000, then I use V/S only and command speed<br />

bug.<br />

For 130,000lb aircraft, I suggest 210KIAS downwind<br />

(or LONG final) with slats extended. Base leg, flaps<br />

11 and 185, on long final you can, if ATC will let you,<br />

flaps 15 and 165 but I prefer to keep the speed up.<br />

At glide slope alive - Gear down/ flaps 15 and speed<br />

155. 1/2 dot to glide slope, flaps 40, command<br />

speed which is vref+5K if the autothottles are<br />

working. Final will be at about 137 or so.<br />

R. Winston Whitlock, Jr.<br />

Chairman's Club 2004<br />

MD88/90 Flight Training Procedures Instructor<br />

<strong>Delta</strong> Air Lines, Inc.<br />

I would like to thank Mr. Whitlock once again for<br />

taking the time to write in and offer this very unique<br />

opportunity to learn from a professional <strong>Mad</strong> <strong>Dog</strong><br />

pilot. I sincerely hope he will offer his expertise in the<br />

future. I’m sure I speak for all of us in saying that we<br />

always welcome such insight and are eager to learn<br />

more about how the real pilots fly this amazing<br />

aircraft.<br />

When climbing or descending using IAS, think of the<br />

IAS window as the "going to" airspeed and the<br />

command speed as the "after you get there"<br />

airspeed. Always plan on updating the command<br />

speed.<br />

<strong>The</strong> <strong>Mad</strong> <strong>Dog</strong> “Growl” –April / <strong>May</strong> <strong>2006</strong> <strong>Page</strong> 9

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