WASHINGTON, March 6 (Reuters) - Boeing ( BA ) on

Wednesday provided U.S. regulators with the names of employees

on its 737 MAX door team after lawmakers and a federal safety

official sharply criticized the planemaker's failure to do so at

a Senate hearing.

National Transportation Safety Board Chair Jennifer Homendy

had said earlier on Wednesday that Boeing ( BA ) had failed to supply

the employee names and some key records sought in the agency's

ongoing investigation into the Jan. 5 Alaska Airlines

737 MAX 9 mid-air cabin door plug emergency.

Homendy said at the Senate Commerce Committee hearing that

investigators sought the names of the 25 people who work on door

plugs at a Boeing ( BA ) facility in Renton, Washington, and had begun

a week of interviews on Sunday. "It is absurd that two months

later we don't have it," she said.

Boeing ( BA ) said on Wednesday that soon after the incident it had

provided the NTSB with the names of some of its employees,

including door specialists it believed would have relevant

information.

After Homendy's comments on Wednesday, Boeing ( BA ) provided the

employee list, a NTSB spokesperson said, saying the agency

received the names around 2 p.m. ET (1900 GMT).

"We have now provided the full list of individuals on the

737 door team, in response to a recent request," the planemaker

said in a statement, adding, "if the door plug removal was

undocumented there would be no documentation to share. We will

continue to cooperate fully and transparently with the NTSB's

investigation."

Before Boeing ( BA ) issued its statement on Wednesday, Senate

Commerce Committee Chair Maria Cantwell fired off a letter to

the company's CEO, Dave Calhoun, telling him to give the NTSB

those employee names within 48 hours. Cantwell on Wednesday

reiterated she plans to call Calhoun to testify at a future

hearing.

"It's beyond disappointing," Cantwell said. "We have an

entire economy that depends on people getting this right."

SEEKING MORE INFORMATION

Homendy said the NTSB had sought documentation related to

opening and closing of the door plug and removal of key bolts

that were missing and requested documentation related to the

door plug "numerous times over the past few months." She also

said the NTSB has been unable to interview the manager of the

door team who has been out on medical leave.

A spokesperson for Homendy said she stands by her testimony.

Separately, she told Reuters the NTSB plans to hold a

multiple-day investigative hearing into the MAX 9, likely in

late summer, which will include testimony from staff at Boeing ( BA )

and fuselage manufacturer Spirit AeroSystems ( SPR ).

Homendy confirmed that inspections of all other MAX 9 planes

in service found no other missing bolts.

The planemaker has scrambled to explain and strengthen

safety procedures since the January mid-air incident that led to

the FAA grounding the MAX 9 for several weeks. The company has

been the subject of increased scrutiny from regulators and

airlines concerned about the quality of jet production.

Homendy said the NTSB does not know which employees removed

the bolts and failed to reinstall them, she said.

"The NTSB needs to interview the employees," she said. "We

are not about blame at the NTSB. This is the only way we ensure

safety is to find out what happened, what was done, what was not

done, what policies are in place."

Homendy said she was not suggesting any malfeasance on

Boeing's ( BA ) part. "What I'm saying is we've requested the

information. We don't have the information."

Senator Ted Cruz, the top Republican on the Commerce

Committee, called it "utterly unacceptable" that the NTSB was

not receiving full cooperation from Boeing ( BA ) and asked for an

update from Homendy within a week.

Homendy also confirmed that the MAX 9 door plug had moved

during prior flights, citing markings on the door.

There were 154 prior flights by the Alaska Airlines MAX 9

jet before the Jan. 5 flight.

"There were very small movements until it eventually came

out," Homendy said, adding that testing showed "you could see a

bit of a gap towards the end" but that it was not clear how

noticeable it was.

Federal Aviation Administrator Mike Whitaker said last week

Boeing ( BA ) must develop a comprehensive plan to address "systemic

quality-control issues" within 90 days following an all-day

meeting with Calhoun on Feb. 27.

An FAA audit of 737 production found "non-compliance

issues in Boeing's ( BA ) manufacturing process control, parts handling

and storage, and product control," the agency said Monday