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Printed page 9. PDF page 23.
CVR recorded the sound of two clicks similar to the sound of slat/flap movement. At 1619:36.6, the CVR recorded the sound of an “extremely loud noise” and the sound of background noise increasing, which continued until the end of theOpen official document at PDF page 23Loss of Control and Impact with Pacific Ocean, Alaska Airlines Flight 261, McDonnell Douglas MD-83, N963AS, January 31, 2000
Printed page 56. PDF page 70.
apart108 and were recorded about 15 seconds before the second and final dive occurred at 1619:36.6. Analysis determined that all of the thumps had low-to-mid range frequency characteristics, which were not consistent with impulse sounds associated with metal-to-metal tappinOpen official document at PDF page 70Loss of Control and Impact with Pacific Ocean, Alaska Airlines Flight 261, McDonnell Douglas MD-83, N963AS, January 31, 2000
Printed page 65. PDF page 79.
elevator value was -12°, the right elevator value was -11°, and the load factor was 1 G. At 1619:36.6, the CVR recorded an extremely loud noise, and the FDR recorded a right elevator position of -25°.125 By 1619:36.6, the loadOpen official document at PDF page 79Loss of Control and Impact with Pacific Ocean, Alaska Airlines Flight 261, McDonnell Douglas MD-83, N963AS, January 31, 2000
Printed page 134. PDF page 148.
of the slats and flaps. At 1619:35, the flaps were transitioning from 7º to 11º. At 1619:36.6, the CVR recorded the sound of an “extremely loud noise.” Immediately thereafter, the airplane began its final dive. At the time of thisOpen official document at PDF page 148Loss of Control and Impact with Pacific Ocean, Alaska Airlines Flight 261, McDonnell Douglas MD-83, N963AS, January 31, 2000
Printed page 135. PDF page 149.
held at by the brackets. Therefore, the extremely loud noise recorded on the CVR at 1619:36.6 was likely made as the fairing brackets failed and caused the loss of the tip fairing and structural deformation of the tail under flightOpen official document at PDF page 149Loss of Control and Impact with Pacific Ocean, Alaska Airlines Flight 261, McDonnell Douglas MD-83, N963AS, January 31, 2000
Printed page 232. PDF page 246.
clicks similar to slat/flap handle movement] Aircraft Accident Report 1619:36 CAM-? * 1619:36.6 CAM [sound of extremely loud noise] [increase in background noise begins and continues to end of recording] [sound similar to loose articles moving around in cockpit] 1619:37Open official document at PDF page 246Loss of Control and Impact with Pacific Ocean, Alaska Airlines Flight 261, McDonnell Douglas MD-83, N963AS, January 31, 2000