SDR SWIA201641720

Service difficulty report · Pseu · Cndair CL6002B19

Difficulty date: January 4, 2016
Submitted: January 6, 2016
Operation: Air carrier
Aircraft: N971SW
Make and model: Cndair CL6002B19
Aircraft serial: 7947
Aircraft time: 30,236 hours, 25,328 cycles
System (JASC): 2130 · Cabin Pressure Control System
Part: Pseu
Condition: Failed
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

CABIN ALT WARNING AT FL220. CABIN ALT STARTED CLIMBING. CREW DECLARED EMERGENCY. FO: 01/04/2016 TROUBLESHOT CABIN ALT CAUTION AND WARNING MESSAGE IAW FIM. FOUND PSEU SUPPLYING GROUND TO WOW RELAY, K1GA WHILE IN WOW CONDITION CAUSING CPC TO GO THROUGH WOW PROCEDURES. R & R PSEU IAW AMM. PERFORMED OPS TEST OF THE PSEU IAW AMM. PERFORMED FUNCTIONAL TEST OF THE CPC IAW AMM. NO DEFECTS NOTED. R & R WOW RELAYS K1GA AND K2GA. PASSED FUNCTIONAL FLIGHT NO DEFECTS NOTED.