Hi BOAC,
shall we assume that it would be 'nice' to be stabilised on the visual g/slope at 1000' keeping all FOQA readers happy? to achieve this but to be at 1900 at 5.2 from touchdown requires a rate of descent of almost 1300fpm or almost twice the correct rate.
Even that is well within the guidance of our FCTM when doing an ILS in IMC.
So it certainly is not a problem when visual.
"GLIDE SLOPE INTERCEPTION FROM ABOVE
The following procedure should only be applied when established on the localizer. There are a number of factors which might lead to a glide slope interception from above. In such a case, the crew must react without delay to ensure the aircraft is configured for landing before 1 000 ft AAL.
In order to get the best rate of descent when cleared by ATC and below the limiting speeds, the crew should lower the landing gear and select CONF 2. Speedbrakes may also be used, noting the considerations detailed in the sub-section "Deceleration and configuration change" earlier in this chapter. When cleared to intercept the glide slope, the crew should:
• Press the APPR pb on FCU and confirm G/S is armed.
• Select the FCU altitude above aircraft altitude to avoid unwanted ALT*.
• Select V/S
1500 ft/min initially. V/S in excess of 2 000 ft/min will result in the speed increasing towards VFE"