The Federal Aviation Administration asked Pan American World Airways yesterday to demonstrate the airworthiness of engines on six of its Airbus Industrie A300 jumbo jets after FAA inspectors discovered that some maintenance work had been done abroad.

Although maintenance documents and engines on the airplanes were being checked, "We have no planes grounded, and we are operating all our flights this weekend," Pan Am spokesman Merle Richman said.

The FAA permits maintenance at foreign stations only in limited circumstances, such as breakdowns, because the agency has little ability to monitor such work, officials said.

"Pan Am has taken the initiative and is in the process of recertifying the airworthiness of those engines before they return them to service," FAA spokesman Stephen Hayes said. Hayes said the problem was discovered in a routine check and was not related to an in-depth operating and maintenance inspection recently concluded at Pan Am. FAA Request to Pan Am: Double-Check 6 Jet Engines Some Maintenance Was Done Abroad

The Federal Aviation Administration asked Pan American World Airways yesterday to demonstrate the airworthiness of engines on six of its Airbus Industrie A300 jumbo jets after FAA inspectors discovered that some maintenance work had been done abroad.

Although maintenance documents and engines on the airplanes were being checked, "We have no planes grounded, and we are operating all our flights this weekend," Pan Am spokesman Merle Richman said.

The FAA permits maintenance at foreign stations only in limited circumstances, such as breakdowns, because the agency has little ability to monitor such work, officials said.

"Pan Am has taken the initiative and is in the process of recertifying the airworthiness of those engines before they return them to service," FAA spokesman Stephen Hayes said. Hayes said the problem was discovered in a routine check and was not related to an in-depth operating and maintenance inspection recently concluded at Pan Am.