1.1 Add the word ‘degrees’ to all heading instructions (except during surveillance or precision radar approaches). 1.2 Expect clearances; There have been level busts caused by crews confusing the expect level with their cleared level. If possible don’t use expect clearances, if they are required then put the expect level first then the clearance, I.E. BAW123 expect FL150 level BNN, descend now FL210. 1.3 The word ‘hectopascals’ should be used in all cases when the QNH or QFE are passed, irrespective of the value of the pressure setting i.e. above or below 1000mb. 1.4 Take particular care when issuing a clearance to FL One Hundred or FL110. 1.5 Use clear and unambiguous phraseology at all times; challenge poor RTF. 1.6 The Prevented Level Bust Trial indicated particular problems with the misinterpretation of the digits ‘2’ and ‘3’. Consequently controllers should be meticulous in using ICAO pronunciation for these digits (TOO) and (TREE) when issuing level clearances. 1.7 Only give two instructions which require a read back in a single transmission. 1.8 When passing traffic information, do not mention the actual level of the other traffic but pass this in terms of “XXXX feet below your cleared level” or “XXXX feet above you” etc. 1.9 Keep frequency change instructions separate from other instructions where possible. 1.10 Do not restate a cleared level if the pilot has already correctly read it back because the act of restating can introduce the opportunity for error. You do not need to repeat Flight Level information already passed correctly by pilots. 1.11 Use standard phraseology in face-to-face and telephone coordination. 1.12 Aim to keep RTF delivery measured, clear and concise, especially when the frequency is congested. But, if it’s urgent, sound urgent! 2. Read backs 2.1 Minimise the risk of wrong read backs by using simple and correct phraseology. Listen to the whole read back - check that it is completely accurate. Always insist on complete and accurate read backs from pilots. Listen and respond to any uncertainty or questioning in a read back. Refrain from other tasks whilst listening to a read back. If in any doubt - get a repeat. If you hear a double transmission - sort it out. Keep a quiet working environment to aid concentration. Minimise distractions – especially the telephone. 2.2 Use the Write As You Speak Read As You Listen technique to help ensure that you actively monitor the read back from the pilot. 3. Detection of a level bust 3.1 RT tapes on level busts record that the first action of the controller is often to confirm the level of the ‘offending’ aircraft. This invariably confirms that the aircraft has bust its level and that the Mode C that we are receiving is correct. In cases where the aircraft is thereby brought into conflict with another, this can lose valuable time which can be used to resolve the confliction. It is recommended that the first transmission should be to ensure separation, any debate about the cause of the level bust can wait until after the resolution of any conflict. 4. Procedures 4.1 GMC methodology ~ as part of runway safety and of level bust amelioration measures, adopt a ‘No ATC clearance received, then no taxi clearance given’ policy. 4.2 Whenever possible allow pilots to fly the procedure that they have briefed. For example, n reduce or remove the number of changes to ATC departure clearances prior to departure. If such changes are unavoidable then the earlier the changes are passed the better n Allow pilots to fly a standard missed approach unless a change is required to achieve separation 4.3 If there is any doubt expressed, implied or suspected during the readback of a departure clearance or if the pilot advises that the departure clearance passed if different to the planned departure-confirm the SID or departure level. 4.4 Whenever possible, if a pilot reports receiving an ATIS broadcast which is no longer current, highlight any significant changes to avoid one member of the crew going off air to listen to the current ATIS. 5. Sector Manning 5.1 Create r/t time - split sectors.
Posted on: Sat, 22 Jun 2013 07:15:17 +0000
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