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On 7 June 2016 at about 1000 Western Standard Time (WST), a Fokker F28 MK 0100, registered VH-NHF, departed on a charter flight from Christmas Creek to Perth, Western Australia. On board were five crewmembers and 28 passengers.

On climb, at about FL 305, a loud ‘whooshing’ noise was heard by the flight crew on the flight deck and the three cabin crewmembers who were standing in the forward galley. The flight crew then received a ‘PACK 1’ warning in the cockpit and the associated emergency procedure displayed on the multi-function display unit (MFDU).

When the captain turned off air-conditioning pack 1 in accordance with the procedure, they noticed the cabin pressurisation rate of climb increase to in excess of 2,000 ft/min. The ‘PACK 1’ warning was followed by an ‘auto-throttle 1’ warning and then an ‘excessive cabin altitude’ warning. The flight crew conducted an emergency descent to 10,000 ft.

The flight crew diverted the aircraft to Newman and landed there at about 1100.

As a result of this incident, the operator will send all parts removed from the number 1 air-conditioning pack to the manufacturer, or authorised repair organisation, for further technical investigation to determine the cause of the failure of the plenum duct within air-conditioning pack 1.

This incident highlights the importance and value of high-quality training for both flight crew and cabin crew. Quality training clearly assists in equipping crewmembers with the required knowledge and confidence to effectively respond to a time critical emergency.


Aviation Short Investigations Bulletin- Issue 52

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General details
Date: 07 June 2016 Investigation status: Completed 
Time: 11:00 WST  
Location   (show map):49 km W of Newman Airport Investigation type: Occurrence Investigation 
State: Western Australia Occurrence type: Decompression 
Release date: 28 September 2016 Occurrence class: Operational 
Report status: Final Occurrence category: Serious Incident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: Fokker B.V. 
Aircraft model: F28 MK 0100 
Aircraft registration: VH-NHF 
Serial number: 11458 
Operator: Network Aviation 
Type of operation: Charter 
Sector: Jet 
Damage to aircraft: Nil 
Departure point:Christmas Creek, WA
Destination:Perth, WA
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Last update 14 November 2018