What was found
DURING EARLY CLIMB, HEARD A BANG BELOW THE FLOOR. CABIN RATE OF CLIMB WENT TO 2,000 FPM UP. UNABLE TO PRESSURIZE ACFT. FOUND LOOSE CLAMP ON DELIVERY DUCT, SECURED SAME. PRESSURIZED ACFT, OPS NORMAL IAW 21-30.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
DURING EARLY CLIMB, HEARD A BANG BELOW THE FLOOR. CABIN RATE OF CLIMB WENT TO 2,000 FPM UP. UNABLE TO PRESSURIZE ACFT. FOUND LOOSE CLAMP ON DELIVERY DUCT, SECURED SAME. PRESSURIZED ACFT, OPS NORMAL IAW 21-30.