By Abhijith Ganapavaram, Aditya Kalra and Sudipto Ganguly

AHMEDABAD, India, June 15 (Reuters) - Officials from the

U.S. National Transportation Safety Board (NTSB) surveyed the

site of Air India plane crash that killed at least 271 people,

sources said on Sunday, with families continuing to wait for DNA

profiling results to identify charred bodies.

Along with the NTSB, officials from the U.S. Federal

Aviation Administration (FAA) were in Ahmedabad in western

India's Gujarat state surveying the crash site, said one source

with direct knowledge.

The Boeing 787-8 Dreamliner with 242 people on board bound

for Gatwick Airport south of London began losing height seconds

after take-off in Ahmedabad on Thursday, and erupted in a huge

fireball as it hit buildings below. All but one on board were

declared dead in the world's worst aviation disaster in a

decade.

Around 30 people died on the ground.

Air India and the Indian government were looking at several

aspects of the crash including issues linked to its engine

thrust, flaps, and why the landing gear remained open as the

plane took off and then came down.

The secretary of the U.S. Department of Transport, Sean

Duffy, said on Friday he was in the process of deploying a team

from the FAA and the NTSB to India. Boeing ( BA ) and GE, whose engines

were used in the plane, were also sending teams.

"We'll take action should any recommendations come forward

from the NTSB's investigation," Duffy said.

The FAA and NSTB did not immediately respond to Reuters

queries outside regular business hours.

The FAA has said India will lead the investigation, but the

NTSB is the official U.S. representative for providing

assistance, while the FAA provides technical support.

Boeing ( BA ) officials will also look at various parameters

in their inspections, including the angle of landing, as they

investigate the matter, said the first source.

In all, around 10 officials were present at the site on

Sunday, including from the NTSB, said the second source.

India's aviation regulator has ordered all Boeing 787s being

operated by local carriers to be inspected.

The crash brings a fresh challenge for both Air India which

has for years being trying to revamp its fleet, and Boeing ( BA ),

which is trying to rebuild public trust following a series of

safety and production crises.

In Ahmedabad, doctors were struggling to identify bodies

that were charred in the incident, resorting to dental samples

and DNA profiling.

DNA samples of 32 victims from the crash have been

successfully matched, Rajnish Patel, additional superintendent

at the city's main hospital, said on Sunday.

"The bodies for which DNA samples have been matched are

being handed over to the families with due respect," he said.

(Additional reporting by Sumit Khanna in Ahmedabad; Editing by

Raju Gopalakrishnan)