SDR ASOA201901145012

Service difficulty report · Connector · Cndair CL6002B19

Difficulty date: January 14, 2019
Submitted: March 4, 2019
Operation: Air carrier
Aircraft: N781CA
Make and model: Cndair CL6002B19
Aircraft serial: 7312
Aircraft time: 41,022 hours, 38,077 cycles
System (JASC): 2197 · Air Conditioning System Wiring
Part: Connector
Condition: Contaminated
Location: Ac System
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: G

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

What was found

IN CRUISE AT FL350 RT PACK HI TEMP CAUTION MESSAGE DISPLAYED FOLLOWED BY LOSS OF CABIN PRESSURE. STARTED DESCENT TO 10000FT PASSENGER O2 MASKS DEPLOYED AS CABIN CLIMBED TO 15000 AUTO PRESS 1 AND 2 FAIL MESSAGES DISPLAYED. SUPPLEMENTAL INFORMATION UPON FURTHER INVESTIGATION THE RT DUAL BYPASS VALVE ACTUATOR CONNECTOR WAS CONTAMINATED WITH OIL WHICH WOULD CAUSE THE ACTUATOR TO NOT RECEIVE THE CORRECT READINGS. CLEANED CONNECTOR WITH PRESSURIZATION AND OPERATION CHECKS GOOD. THIS SDR IS NOW CLOSED.