WASHINGTON — Flight restrictions imposed around Manhattan after New York Yankees pitcher Cory Lidle crashed his single-engine plane into an apartment tower will be made permanent, government documents indicate.

The plan for the rule change was revealed as the National Transportation Safety Board released papers yesterday detailing its investigation of the October 11 crash that killed Lidle and his flight instructor.

Included in the papers are toxicology reports showing that neither Lidle, 34, nor flight instructor Tyler Stanger, 26, who was with Lidle, had drugs or alcohol in their systems. The NTSB found the airplane’s global positioning device and cockpit display unit were too badly damaged by the fiery crash to reveal any information.

Lidle owned the Cirrus SR-20 plane, and had taken it for a midday trip past the Statue of Liberty and north up the East River. The plane apparently ran into trouble in attempting to turn around and head back south.

The NTSB’s documents do not contain final conclusions about what caused the accident but lay out the facts and evidence gathered by investigators.

The agency does not spell out who was at the controls when it crashed, and due to the lack of data recovered from the plane, the NTSB may have trouble reaching a conclusion on that issue.

The issue has financial implications for Lidle’s survivors. The life insurance policy Lidle received as a major league baseball player calls for a $450,000 life insurance benefit and has an accidental death benefit of $1.05 million.