What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Narrative: pilot departed home base, akr, in N3509U, IFR to K29D. Level @ 7000' yng ATC advised pilot to advise when he would like to start down. Pilot thought this was a clearance to descend at his discretion. Pilot descended from 7000' ATC called him when he was @ 6700 feet. Also, ATC assigned N3509U a heading for destination. Pilot used onboard GP5 information to navigate instead of ATC assigned heading. privacy data omitted
As the FAA filed it
NARRATIVE: PILOT DEPARTED HOME BASE, AKR, IN N3509U, IFR TO K29D. LEVEL @ 7000' YNG ATC ADVISED PILOT TO ADVISE WHEN HE WOULD LIKE TO START DOWN. PILOT THOUGHT THIS WAS A CLEARANCE TO DESCEND AT HIS DISCRETION. PILOT DESCENDED FROM 7000' ATC CALLED HIM WHEN HE WAS @ 6700 FEET. ALSO, ATC ASSIGNED N3509U A HEADING FOR DESTINATION. PILOT USED ONBOARD GP5 INFORMATION TO NAVIGATE INSTEAD OF ATC ASSIGNED HEADING. ^PRIVACY DATA OMITTED^