What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Captian reported loss of pressurization on climb
Through FL220 crew descended to FL 100 right after and once at FL100 flight landed safely in yyz.
Left hand #1 pack – the #1 venturi differential pressure sensor was replaced and operational checks carried out successful.
Right hand #2 pack- the right-hand acm, right hand dual heat exchanger, and load limit by-pass valve were replaced. Operational checks were carried out successful.
Aircraft returned to service.
As the FAA filed it
CAPTIAN REPORTED LOSS OF PRESSURIZATION ON CLIMB
THROUGH FL220 CREW DESCENDED TO FL 100 RIGHT AFTER AND ONCE AT FL100 FLIGHT LANDED SAFELY IN YYZ.
LEFT HAND #1 PACK – THE #1 VENTURI DIFFERENTIAL PRESSURE SENSOR WAS REPLACED AND OPERATIONAL CHECKS CARRIED OUT SUCCESSFUL.
RIGHT HAND #2 PACK- THE RIGHT-HAND ACM, RIGHT HAND DUAL HEAT EXCHANGER, AND LOAD LIMIT BY-PASS VALVE WERE REPLACED. OPERATIONAL CHECKS WERE CARRIED OUT SUCCESSFUL.
AIRCRAFT RETURNED TO SERVICE.