A Pegasus Airlines Airbus A321neo, performing flight from Istanbul to Dusseldorf being over Romania, about 120 miles west of Bucharest, at 36000 feet was informed by the air traffic controller about bomb on board the aircraft. This information was given by Istanbul police. The flight crew decided to divert to Bucharest. After landing the airplane stopped on the taxiway. All passengers were disembarked as it was reported.
Best practice embedded in the ASSIST principle could be followed
• A - acknowledge the bomb warning, ask for intentions and provide information regarding next suitable for landing aerodromes as necessary;
• S - separate the aircraft and if necessary prioritise it for landing, allow long final if requested, keep the active runway clear of departures, arrivals and vehicles;
• S - silence the non-urgent calls (as required) and use separate frequency where possible;
• I - inform the supervisor and other sectors/units concerned; inform the airport emergency fire rescue services and all concerned parties according to local procedures; as tower controller expect airport authorities to execute their bomb threat emergency plan.
• S - support the flight by providing any information requested and necessary such as type of approach, runway length and any additional aerodrome details, etc.
• T - provide time for the crew to assess the situation, don’t press with non urgent matters.
• A - acknowledge the bomb warning, ask for intentions and provide information regarding next suitable for landing aerodromes as necessary;
• S - separate the aircraft and if necessary prioritise it for landing, allow long final if requested, keep the active runway clear of departures, arrivals and vehicles;
• S - silence the non-urgent calls (as required) and use separate frequency where possible;
• I - inform the supervisor and other sectors/units concerned; inform the airport emergency fire rescue services and all concerned parties according to local procedures; as tower controller expect airport authorities to execute their bomb threat emergency plan.
• S - support the flight by providing any information requested and necessary such as type of approach, runway length and any additional aerodrome details, etc.
• T - provide time for the crew to assess the situation, don’t press with non urgent matters.
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TCAS II issues the following types of aural annunciations:
•Traffic advisory (TA)
•Resolution advisory (RA)
•Clear of conflict
When a TA is issued, pilots are instructed to initiate a visual search for the traffic causing the TA. If the traffic is visually acquired, pilots are instructed to maintain visual separation from the traffic. The pilot training programs also indicate that no horizontal maneuvers are to be made based solely on information shown on the traffic display. Slight adjustments in vertical speed while climbing or descending, or slight adjustments in airspeed while still complying with the ATC clearance are acceptable.
•Traffic advisory (TA)
•Resolution advisory (RA)
•Clear of conflict
When a TA is issued, pilots are instructed to initiate a visual search for the traffic causing the TA. If the traffic is visually acquired, pilots are instructed to maintain visual separation from the traffic. The pilot training programs also indicate that no horizontal maneuvers are to be made based solely on information shown on the traffic display. Slight adjustments in vertical speed while climbing or descending, or slight adjustments in airspeed while still complying with the ATC clearance are acceptable.
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When an RA is issued, pilots are expected to respond immediately to the RA unless doing so would jeopardize the safe operation of the flight. This means that aircraft will at times have to manoeuver contrary to ATC instructions or disregard ATC instructions. In these cases, the controller is no longer responsible for separation of the aircraft involved in the RA until the conflict is terminated. Although the system occasionally suffers from false alarms, pilots are now under strict instructions to regard all TCAS messages as genuine alerts demanding an immediate, high-priority response.
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