Incident Date: 2018/03/19
C-GHKR, an Airbus 330-343 aircraft operated by Air Canada was conducting flight ACA836 from Toronto/Lester B. Pearson Intl., ON (CYYZ) to Madrid/Adolfo Suárez Madrid-Barajas Intl., Spain (LEMD) with 10 crew members and 214 passengers on board. During cruise, approximately half way through the flight, the yellow hydraulic pressure indication went to zero. The flight crew contacted the operator’s maintenance, and continued to destination. The hydraulic system fault resulted in a reduced flap flow rate and inoperative RH thrust reverse. The flight landed without incident in LEMD.
The operator’s maintenance found the yellow hydraulic pressure manifold supply check valve leaking due to a worn seal. The check valve was reinstalled with new seals.