Aviation safety investigations & reports

Cessna R182, VH-MXL, Cessna 172 N, VH-TKM, Near Moorabbin VIC, 2 January 1987

Investigation number:
198701469
Status: Completed
Investigation completed

Summary

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When the pilot of VH-MXL lodged his flight plan, relevant details were inadvertently not transmitted to all necessary recipients by the AFTN system. As a result, Melbourne Approach was unaware of the planned track of the aircraft. The flight evidently proceeded normally until the pilot had reported his position at Port Phillip Heads to Melbourne Flight Service, and had requested an airways clearance. Essendon aerodrome was closed to Visual Flight Rules operations, and Melbourne Approach, after receiving details from Flight Service, cleared the aircraft to enter controlled airspace at 4000 feet on track from Port Phillip Heads to Essendon. This clearance was passed to the aircraft 11 minutes after the initial request. The Approach controller had not been informed that the aircraft was tracking via Frankston, a track which crossed the NDB instrument letdown pattern for Moorabbin. Shortly afterwards the aircraft was identified on radar by the Approach controller, and it became evident that the aircraft was in conflict with VH-TKM, which was conducting an instrument approach to Moorabbin. The airways clearance for VH-MXL was cancelled, but before positive action could be taken the aircraft passed within about half a kilometre of each other. It was considered that a number of communication breakdowns contributed to this incident. (a) The flight plan was incorrectly addressed. (b) The relevant Flight Service officer did not inform Melbourne Approach of the tracking details of the aircraft. (c) The Flight Service officer did not query the clearance as issued, although he was aware of the tracking details. (d) The pilot did not query the clearance, although it would have been virtually impossible for him to comply with the tracking instructions from his present position.

Download Final Report
[Download  PDF: 23KB]
 
 
 
General details
Date: 02 January 1987   Investigation status: Completed  
Time: 2000    
Location: Near Moorabbin    
State: Victoria   Occurrence type: Loss of separation  
Release date: 05 August 1987   Occurrence category: Incident  
Report status: Final   Highest injury level: None  

Aircraft 1 details

Aircraft 1 details
Aircraft manufacturer Cessna Aircraft Company  
Aircraft model 182  
Aircraft registration VH-MXL  
Type of operation Private  
Damage to aircraft Nil  
Departure point Parafield SA  
Departure time N/A  
Destination Essendon VIC  

Aircraft 2 details

Aircraft 2 details
Aircraft manufacturer Cessna Aircraft Company  
Aircraft model 172  
Aircraft registration VH-TKM  
Type of operation Private  
Damage to aircraft Nil  
Departure point Mangalore VIC  
Destination Moorabbin VIC