Given the litigious nature we live a consultation with an aviation attorney may be recommended. Many C/Ps are very happy to throw their charges under the bus. Depending on the nature of your "PAN". Carriers are prone to circle their wagons to protect the image of the carrier.
As a captain, you need to have a group debrief with the entire crew.
A time line of events is a must ASAP to ensure accuracy from the onset of the event until it's ultimate conclusion... The conclusion is usually when you are home in bed after the last phone call from the company.
Utilize your mobile to photograph the effected area of the aircraft and tech log entry that may be brought under scrutiny.