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Printed page label not indexed. PDF page 14.
lubrication would result in excessive wear of the acme nut threads, and Alaska Airlines' extended end play check interval and the FAA's approval of that extension, which allowed the excessive wear of the acme nut threads to progress to failureOpen official document at PDF page 14Loss of Control and Impact with Pacific Ocean, Alaska Airlines Flight 261, McDonnell Douglas MD-83, N963AS, January 31, 2000
Printed page 152. PDF page 166.
safety margin than intended. The Safety Board notes that, because of Alaska Airlines' extended end play check interval of 30 months, or about 9,550 flight hours, after the accident airplane's last end play check in September 1997, the jackscrew assemblyOpen official document at PDF page 166Loss of Control and Impact with Pacific Ocean, Alaska Airlines Flight 261, McDonnell Douglas MD-83, N963AS, January 31, 2000
Printed page 180. PDF page 194.
lubrication would result in excessive wear of the acme nut threads, and Alaska Airlines' extended end play check interval and the FAA's approval of that extension, which allowed the excessive wear of the acme nut threads to progress to failureOpen official document at PDF page 194Loss of Control and Impact with Pacific Ocean, Alaska Airlines Flight 261, McDonnell Douglas MD-83, N963AS, January 31, 2000
Printed page 47. PDF page 61.
be accomplished every 5,000 flight hours. By July 1988, C-check intervals had been extended to 13 months, with no accompanying flight-hour limit; therefore, end play checks were to be accomplished every 26 calendar months, or about every 6,400 flightOpen official document at PDF page 61Loss of Control and Impact with Pacific Ocean, Alaska Airlines Flight 261, McDonnell Douglas MD-83, N963AS, January 31, 2000
Printed page 151. PDF page 165.
checks were performed every 5,000 flight hours. By July 1988, C-check intervals had been extended to 13 months, with no corresponding flight-time limit; therefore, end play checks were performed every 26 months, which was approximately 6,400 flight hours, based onOpen official document at PDF page 165Loss of Control and Impact with Pacific Ocean, Alaska Airlines Flight 261, McDonnell Douglas MD-83, N963AS, January 31, 2000
Printed page 169. PDF page 183.
Extension of End Play Check Interval As previously discussed, in 1996, Alaska Airlines extended its C-check interval from 13 to 15 months, which resulted in the end play check interval being increased from 26 to 30 months. Although 30 monthsOpen official document at PDF page 183Loss of Control and Impact with Pacific Ocean, Alaska Airlines Flight 261, McDonnell Douglas MD-83, N963AS, January 31, 2000