Zest A320 near Manila on Aug 9th 2014, loss of cabin pressure

Last Update: September 9, 2016 / 13:09:39 GMT/Zulu time

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Incident Facts

Date of incident
Aug 9, 2014

Classification
Incident

Flight number
Z2-63

Aircraft Registration
RP-C8993

Aircraft Type
Airbus A320

ICAO Type Designator
A320

An AirAsia Zest Airbus A320-200, registration RP-C8993 performing flight Z2-63 from Jinjang (China) to Manila (Philippines) with 109 passengers and 6 crew, was enroute near Guangzhou (China) when the right hand bleed air system failed. The crew continued the flight, climbed the aircraft to FL370 but needed to initiate an emergency descent about 250nm short of Manila when the left hand air conditioning system failed, too. The passenger oxygen masks were released during the descent. The aircraft continued to Manila at FL100 for a safe landing about 50 minutes after leaving FL370.

The CAAP released their summary of the final report concluding the probable causes of the incident were:

Primary Cause

The Fan Air Valve Control Thermostat may have sent erroneous signals to Bleed Monitoring Computer #2 causing for the Air Engine Bleed #2 to close while on flight (Material Failure). Said part is a condition item and has no periodic replacement which opens the possibility of them failing without warning.

Contributory Factors

Absence of manufacturer periodic parts replacement for Fan Air Valve Control Thermostat.

The CAAP reported the aircraft experienced a fault message on the #2 bleed air system while enroute at 7800 meters in Guangzhou FIR (China). The related checklists were actioned, the aircraft subsequently climbed to FL370. About 190nm from Manila the crew received a fault indication for the #1 bleed air system, the crew requested and was cleared for a preemptive descent to FL100, descending through FL300 the first officer, while running the related checklists, released the passenger oxygen masks.
Incident Facts

Date of incident
Aug 9, 2014

Classification
Incident

Flight number
Z2-63

Aircraft Registration
RP-C8993

Aircraft Type
Airbus A320

ICAO Type Designator
A320

This article is published under license from Avherald.com. © of text by Avherald.com.
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