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American Airlines 1420

Printed page 3. PDF page 17.

that he had provided the limitation for a dry runway. The captain then stated that the wet runway crosswind limitation was 20 knots, but the first officer stated that the limitation was 25 knots. In testimony at the National Transporation
Open official document at PDF page 17Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999

American Airlines 1420

Printed page 23. PDF page 37.

runway length is the demonstrated landing distance plus 67 percent. The Part 121 minimum wet runway length is the minimum dry runway length plus 15 percent. The Boeing engineer testified that the MD-80's landing performance was demonstrated to the FAA
Open official document at PDF page 37Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999

American Airlines 1420

Printed page 40. PDF page 54.

end of the runway (just before the initial left main landing gear tire marks). Dry and wet runway drainage tests were performed, and the winds were calm at the time of the tests. The test data indicated that the average
Open official document at PDF page 54Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999

American Airlines 1420

Printed page 61. PDF page 75.

aerodynamic chord; temperature, 25º C (77º F); rolling friction coefficient, 0.02; wet runway braking friction coefficient, ranging from 0.21 to 0.28 at flight 1420's speeds from touchdown to the end of the runway; touchdown speed, 152
Open official document at PDF page 75Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999

American Airlines 1420

Printed page 68. PDF page 82.

Supplement, did not contain any guidance for instructing landings with crosswinds or on wet runways. According to American, its instructor guides refer the instructor to the appropriate flight and operating manuals for this information. 114 The former MD-80 Fleet Manager
Open official document at PDF page 82Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999

American Airlines 1420

Printed page 69. PDF page 83.

accident stated that aggressive manual brakes or maximum autobrakes should be used with wet runway conditions (see section 1.17.4.3). No discussion occurred in either session regarding what constitutes a slippery runway and what distinguishes it from a wet runway. During
Open official document at PDF page 83Runway Overrun During Landing: American Airlines Flight 1420, McDonnell Douglas MD-82, N215AA, Little Rock, Arkansas, June 1, 1999