SDR 6SHB2012120501

Service difficulty report · Duct · Cndair CL6002B19

Difficulty date: December 5, 2012
Submitted: December 20, 2012
Operation: Air carrier
Aircraft: N60GH
Make and model: Cndair CL6002B19
Aircraft serial: 7274
Aircraft time: 18,581 hours, 15,713 cycles
System (JASC): 2120 · Air Distribution System
Part: Duct
Condition: Disconnected
Location: Precooler
Part time: 18,581 hours, 15,713 cycles
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

DEPARTED WITH 1 OF 2 AIR CONDITIONING PACKS DEFERRED. CLIMBING OUT OF 11000 FT NOTICED A LOSS OF AIRFLOW FROM OUR VENTS. CHECKED CABIN PRESSURE AND IT SEEMED NORMAL, CONTINUED CLIMB TO FL 230. MONITORED PRESSURE AND NOTICED IT BEGAN TO CLIMB ABOVE NORMAL SETTINGS. LEVELED OFF AT FL190, FELT SOMETHING WAS NOT RIGHT. RECEIVED A CABIN ALTITUDE CAUTION MESSAGE. RAN QRH CHECKLIST. CABIN ALTITUDE WARNING CAME ON. LANDED AND DETERMINED A DUCT BLEW OFF OF THE PRECOOLER.