"Garuda and Lion Air have done a tremendous amount of soul searching in terms of safety and in bringing in experts ... to help them clean up their act," Yusof said. The newer airlines, however, may need more scrutiny.
Smaller airlines serving the domestic market may have less money to invest in training and hiring qualified pilots and mechanics, said Simatupang, the Indonesian aviation consultant.
"There are a lot of new pilots whose flying hours don't meet the minimum standards, but because the operators need them, they use them sometimes," she said.
Like Yusof, Simatupang called on the government to do more to regulate the new airlines.
"I always say to the government, please do the new infrastructure and safety regulations first," she said. "And then allow the airlines to expand."
Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.