Crash probe questions FAA methods

Associated Press

WASHINGTON — A government hearing into an Alaska Airlines crash that killed all 88 people aboard ended Saturday night with investigators questioning the safety of a critical part used in the popular Boeing MD-80 and DC-9 series of jetliners.

"We’re just gathering evidence to see where the safety deficiencies are," John Hammerschmidt, who conducted the National Transportation Safety Board’s four-day hearing into the Jan. 31 crash, said in an interview.

"There may be other aspects to the investigation that are not readily apparent from this hearing," he said.

The board plans to continue its investigation, with a conclusion on cause of the crash and recommendations expected in several months. It also can reopen the hearing if it chooses, Hammerschmidt told participants.

From the start, the hearing focused on airline maintenance problems and the failure of a 2 1/2-foot-long jackscrew that helps control up-and-down movement in the tail wing of the MD-83 aircraft.

Saturday’s testimony dealt with the adequacy of Federal Aviation Administration’s procedures for monitoring of MD-80 and DC-9 jetliners, and why, as the NTSB’s Benjamin Berman put it, the FAA "didn’t pick up on these systemic problems." Flight standards director Nick Lacey said the FAA is studying itself to determine just that.

"We are learning through this process," Lacey said at the hearing’s end.

For the victims’ families, who hugged during breaks and taped photos of loved ones to chairs, the hearing was an often tedious exercise in accountability.

"It’s very surreal. It feels really like this unbearable parade of if-onlys" said Emily Barnett, 37, of Bellingham. Her sister, Claire, 39, lost two daughters, ages 6 and 8, killed along with her ex-husband on Alaska Airlines Flight 261 from Puerto Vallarta to San Francisco.

The jackscrew’s threads were found stripped and investigators suspect Boeing-approved Aeroshell 33 grease might have corroded the threads, or the jackscrew was left without lubrication because of a mechanical malfunction, or the grease was improperly mixed with Mobil 28 grease, causing both to break down.

Navy tests found the Aeroshell 33 grease was "contaminated" with Mobil 28 and contained aluminum-bronze particles from a stripped 8-inch gimbal nut.

"Two incompatible greases should not be mixed because an inferior product could result," the Navy reported. And Boeing engineer Dennis Jerome acknowledged, "There may be a chemical reaction between the two greases."

About 2,100 of the DC-9s and their MD-80 successors are in use, making them the world’s second-most popular models. The Boeing 737, with more than 3,000 in service, is the No. 1 plane.

Copyright ©2000 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.

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