Service difficulty report · Isolation Valve · Boeing 727225

Difficulty date
April 28, 2020
Submitted
May 5, 2020
Operation
Air carrier
Aircraft
N724CK
Make and model
Boeing 727225
Aircraft serial
20383
Aircraft time
63,667 hours, 48,752 cycles
Part
Isolation Valve
Part number
20211362
Part serial
6910687
Condition
Defective
Location
Cabin Pressure
Stage of operation
CL
How discovered
O
Nature of condition
J
Precautionary procedure
A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

PRESSURIZATION SYSTEM FAILED TO PRESSURIZE DURING CLIMB OUT. AIRCRAFT RETURNED TO KCVG FOR UNSCHEDULED LANDING.