4/20/23 

AIM 

TBL 7

−

1

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12 

TWIP

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Equipped Airports 

Airport 

Identifier 

Andrews AFB, MD 

KADW 

Hartsfield

−

Jackson Atlanta Intl Airport 

KATL 

Nashville Intl Airport 

KBNA 

Logan Intl Airport 

KBOS 

Baltimore/Washington Intl Airport 

KBWI 

Hopkins Intl Airport 

KCLE 

Charlotte/Douglas Intl Airport 

KCLT 

Port Columbus Intl Airport 

KCMH 

Cincinnati/Northern Kentucky Intl Airport  KCVG 
Dallas Love Field Airport 

KDAL 

James M. Cox Intl Airport 

KDAY 

Ronald Reagan Washington National Air-

port 

KDCA 

Denver Intl Airport 

KDEN 

Dallas

−

Fort Worth Intl Airport 

KDFW 

Detroit Metro Wayne County Airport 

KDTW 

Newark Liberty Intl Airport 

KEWR 

Fort Lauderdale

−

Hollywood Intl Airport 

KFLL 

William P. Hobby Airport 

KHOU 

Washington Dulles Intl Airport 

KIAD 

George Bush Intercontinental Airport 

KIAH 

Wichita Mid

−

Continent Airport 

KICT 

Indianapolis Intl Airport 

KIND 

John F. Kennedy Intl Airport 

KJFK 

Airport 

Identifier 

Harry Reid Intl Airport 

KLAS 

LaGuardia Airport 

KLGA 

Kansas City Intl Airport 

KMCI 

Orlando Intl Airport 

KMCO 

Midway Intl Airport 

KMDW 

Memphis Intl Airport 

KMEM 

Miami Intl Airport 

KMIA 

General Mitchell Intl Airport 

KMKE 

Minneapolis St. Paul Intl Airport 

KMSP 

Louis Armstrong New Orleans Intl Air-

port 

KMSY 

Will Rogers World Airport 

KOKC 

O’Hare Intl Airport 

KORD 

Palm Beach Intl Airport 

KPBI 

Philadelphia Intl Airport 

KPHL 

Phoenix Sky Harbor Intl Airport 

KPHX 

Pittsburgh Intl Airport 

KPIT 

Raleigh

−

Durham Intl Airport 

KRDU 

Louisville Intl Airport 

KSDF 

Salt Lake City Intl Airport 

KSLC 

Lambert

−

St. Louis Intl Airport 

KSTL 

Tampa Intl Airport 

KTPA 

Tulsa Intl Airport 

KTUL 

Luis Munoz Marin Intl Airport 

TJSJ 

7

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1

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25.  PIREPs Relating to Volcanic Ash Activity 

a. 

Volcanic eruptions which send ash into the upper atmosphere occur somewhere around the world several 

times each year. Flying into a volcanic ash cloud can be extremely dangerous. At least two B747s have lost all 

power in all four engines after such an encounter. Regardless of the type aircraft, some damage is almost certain 

to ensue after an encounter with a volcanic ash cloud. Additionally, studies have shown that volcanic eruptions 

are the only significant source of large quantities of sulphur dioxide (SO

2

) gas at jet-cruising altitudes. Therefore, 

the detection and subsequent reporting of SO

2

 is of significant importance. Although SO

2

 is colorless, its 

presence in the atmosphere should be suspected when a sulphur-like or rotten egg odor is present throughout the 

cabin. 

b. 

While some volcanoes in the U.S. are monitored, many in remote areas are not. These unmonitored 

volcanoes may erupt without prior warning to the aviation community. A pilot observing a volcanic eruption who 

has not had previous notification of it may be the only witness to the eruption. Pilots are strongly encouraged 

to transmit a PIREP regarding volcanic eruptions and any observed volcanic ash clouds or detection of sulphur 

dioxide (SO

2

) gas associated with volcanic activity. 

Meteorology 

7

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1

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