Aviation safety investigations & reports
Violation of controlled airspace - Piper PA-28-181, VH-TXD near Altona, Vic, 26 September 2011
AO-2011-123

Summary
On 26 September 2011 at 1151 Eastern Standard Time, the crew of an Airbus A321 (Airbus) aircraft, registered VH-VWW, received on the aircraft's traffic alert and collision avoidance system (TCAS) a traffic advisory (TA) alert, for an aircraft that was approaching from their front-right position at 2 NM (3.7 km) at 2,700 ft. The Airbus was maintaining 3,000 ft on an ARBEY standard terminal arrival route to runway 34 Left at Melbourne Airport, Victoria and was in Class C controlled airspace. The upper limit of non-controlled Class G airspace in the area was 2,500 ft.
It was later found that the pilot of the other aircraft a Piper PA-28-181 Archer, registered VH-TXD, had incorrectly set the aircraft's altimeter barometric pressure subscale setting, resulting in the aircraft entering controlled airspace without a clearance and a violation of controlled airspace occurring.
The occurrence was quickly resolved due to the traffic alert from the Airbus A321 aircraft's TCAS and the subsequent response from the flight crew.
This incident acts as a reminder to pilots of the importance to
cross-check cockpit settings before flight.
General details
Date: | 26 September 2011 | Investigation status: | Completed | ||
Time: | 1152 EST | Investigation level: | Short - click for an explanation of investigation levels | ||
Location (show map): | near Altona | ||||
State: | Victoria | Occurrence type: | Loss of separation | ||
Release date: | 14 March 2012 | Occurrence class: | Airspace | ||
Report status: | Final | Occurrence category: | Incident | ||
Highest injury level: | None |
Aircraft 1 details
Aircraft manufacturer | Airbus Industrie | |
---|---|---|
Aircraft model | A321 | |
Aircraft registration | VH-VWW | |
Serial number | 3916 | |
Operator | Jetstar | |
Type of operation | Air Transport High Capacity | |
Damage to aircraft | Nil | |
Departure point | Darwin, NT | |
Destination | Melbourne, Vic |
Aircraft 2 details
Aircraft manufacturer | Piper Aircraft Corp | |
---|---|---|
Aircraft model | PA-28 | |
Aircraft registration | VH-TXD | |
Serial number | 2843577 | |
Type of operation | Private | |
Damage to aircraft | Nil |