NTSB's Final Report on Alaska Air 261 Published | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Recent Daily Episodes

Episode Date

Monday

Tuesday

Wednesday

Thursday

Friday

Airborne On ANN

Airborne 03.30.15

Airborne 03.31.15

Airborne 04.01.15

Airborne 03.26.15

Airborne 03.27.15

Airborne Hi-Def On YouTube

Airborne 03.30.15

Airborne 03.31.15

Airborne 04.01.15

Airborne 03.26.15

Airborne 03.27.15

 

Fri, Jan 17, 2003

NTSB's Final Report on Alaska Air 261 Published

The NTSB has published an exhaustive final report on its investigation into the fatal crash of Alaska Air 261 on January 31, 2000. The accident occured about 2.7 Miles North of Anacapa Island, California and involved a McDonnell Douglas MD-83, N963AS. 

The NTSB's executive summary states that, "On January 31, 2000, about 1621 Pacific standard time, Alaska Airlines, Inc., flight 261, a McDonnell Douglas MD-83, N963AS, crashed into the Pacific Ocean about 2.7 miles north of Anacapa Island, California. The 2 pilots, 3 cabin crewmembers, and 83 passengers on board were killed, and the airplane was destroyed by impact forces. Flight 261 was operating as a scheduled international passenger flight under the provisions of 14 Code of Federal Regulations Part 121 from Lic Gustavo Diaz Ordaz International Airport, Puerto Vallarta, Mexico, to Seattle-Tacoma International Airport, Seattle, Washington, with an intermediate stop planned at San Francisco International Airport, San Francisco, California. Visual meteorological conditions prevailed for the flight, which operated on an instrument flight rules flight plan.

The National Transportation Safety Board determines that the probable cause of this accident was a loss of airplane pitch control resulting from the in-flight failure of the horizontal stabilizer trim system jackscrew assembly’s acme nut threads. The thread failure was caused by excessive wear resulting from Alaska Airlines’ insufficient lubrication of the jackscrew assembly.

Contributing to the accident were Alaska Airlines’ extended lubrication interval and the Federal Aviation Administration’s (FAA) approval of that extension, which increased the likelihood that a missed or inadequate 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 failure without the opportunity for detection. Also contributing to the accident was the absence on the McDonnell Douglas MD-80 of a fail-safe mechanism to prevent the catastrophic effects of total acme nut thread loss.

The safety issues discussed in this report include lubrication and inspection of the jackscrew assembly, extension of lubrication and end play check intervals, jackscrew assembly overhaul procedures, the design and certification of the MD-80 horizontal stabilizer trim control system, Alaska Airlines’ maintenance program, and FAA oversight of Alaska Airlines. Safety recommendations are addressed to the FAA."

FMI: http://www.ntsb.gov/publictn/2002/AAR0201.htm

Advertisement

More News

04.01.15 Special: New Apple Watch May Eliminate Medical Exams For Airline Pilots

Combining The Capabilities Of Apple Technology And ADS-B Out May Replace Airline Pilot Medicals, But There Could Be A Catch ANN's April 1 "April Fool" Special Edition As the Pilots>[...]

04.01.15 Special: Inhofe -- Media Reporting On Aviation Should Be Knowledgeable

Proposes Legislation To Have Journalists Pass A Basic Written Exam ANN’s April 1 “April Fools” Special Edition Senator James Inhofe (R-OK) has proposed legislatio>[...]

04.01.15 Special: Regional Airline Looks To Undocumented Immigrants

Carrier Says Americans Unwilling To Take The Jobs At What It Can Afford To Pay ANN’s April 1 “April Fool” Edition It may just be the tip of the iceberg, but Repub>[...]

04.01.15 Special: Roscosmos Sues Boeing, SpaceX

Tries To Prevent Launches From Returning To American Soil The Russian Space Agency Roscosmos has filed a lawsuit in a Russian court against Boeing and SpaceX, saying the two U.S. c>[...]

Airborne 04.01.15: April 1st Special Episode!, David Bowie In Space, New TBirds!

Also: Inhofe Demands Media Aero-Accountability, "Super Duper" Cub, RANS' Exclusive WalMart Deal, Obama To Keep Air Force One, Cessna Bringing Back Bamboo Bomber Pop-star legend, Da>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2015 Web Development & Design by Pauli Systems, LC