Restraining plug

A plug assembly for plugging one or more ports of a gas turbine engine, the plug assembly comprising:

• a sheath comprising:
• an inner end;
• an outer end located opposite the inner end;
• and
• a sheath through-passage extending from the outer end to the inner end;
• a connector body passing through the sheath through-passage, the connector body comprising a rotatable joint;
• a cover operably connected to the connector body via the rotatable joint;
• a biasing mechanism configured to apply a force to the connector body;
• and
• a top housing that is slid over the biasing mechanism such than an upper end of the connector body projects past a top end of the top housing, the top housing also comprising a bottom end and a connector passageway extending from the bottom end to the top end of the top housing, wherein the biasing mechanism abuts the bottom end or is located in a cavity at the bottom end, and wherein the connector body passes through the connector passageway;
• and
• a locking pin inserted into a locking pin through-passage in the upper end of the connector body.