What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
New york Oceanic air traffic control issued avianca flight 019 an enroute clearance to climb and maintain 38,000 feet (FL380). Avianca flight 019 accepted the climb clearance to FL380. Avianca flight 019 elected not to immediately comply with the accepted air traffic control clearance and instead remained level at FL370 due to the strong headwinds they were encountering at the time. Avianca did not notify ATC of the delay or request a deviation from the recently accepted change of altitude clearance. Pilot stated that since the clearance did not contain a time restriction, he assumed that compliance with the climb clearance was at his discretion.
As the FAA filed it
NEW YORK OCEANIC AIR TRAFFIC CONTROL ISSUED AVIANCA FLIGHT 019 AN ENROUTE CLEARANCE TO CLIMB AND MAINTAIN 38,000 FEET (FL380). AVIANCA FLIGHT 019 ACCEPTED THE CLIMB CLEARANCE TO FL380. AVIANCA FLIGHT 019 ELECTED NOT TO IMMEDIATELY COMPLY WITH THE ACCEPTED AIR TRAFFIC CONTROL CLEARANCE AND INSTEAD REMAINED LEVEL AT FL370 DUE TO THE STRONG HEADWINDS THEY WERE ENCOUNTERING AT THE TIME. AVIANCA DID NOT NOTIFY ATC OF THE DELAY OR REQUEST A DEVIATION FROM THE RECENTLY ACCEPTED CHANGE OF ALTITUDE CLEARANCE. PILOT STATED THAT SINCE THE CLEARANCE DID NOT CONTAIN A TIME RESTRICTION, HE ASSUMED THAT COMPLIANCE WITH THE CLIMB CLEARANCE WAS AT HIS DISCRETION.