Runway 07L missed approach

[JammedStab]

I see that for the ILS, you turn to 058° at 300 feet. If on the missed from the localizer approach, do you turn to 058° at 400 AAE?

I guess terrain the reason for the differences.

[monster330]

For the LOC you turn right 58 deg

[throw a dyce]

The only reason I can think of is climb gradient from ILS decision height of 100ft.You can't turn before the same point on both(0.2dme from the localiser),so they have probably worked out that using minimum climb gradient allowed,after the point you can turn you would be at 300ft.
On the LOC you don't go below 400 AAL,so after the 0.2 dme point turn left onto 058 deg.
I think in real life most heavies would be a lot higher before turning,just to get the aircraft sorted out.
That's just squinting at the charts but it probably a 10 HKD question.Why?
Monster;Right onto 058.That would be exciting doing AMS.

[cxorcist]

Monster330,

Right to 058???

... "Because I was inverted!"

[Bedder believeit]

The reason that the overshoot on the 07L ILS/DME Approach was changed to its present form, was to facilitate the improved occasions during which simultaneous arrivals (on 07L) and departures on 07R could be conducted in accordance with ICAO PANS-OPS.
When the North Runway first openned, the missed approach for 07L tracked straight ahead to SMT, before a left turn to the North was made, and as such, when using the 07's, co-ordinated mode was used continuously regardless of weather. About 8 years ago, an improvement was instituted so that the missed approach on 07L commenced with a left turn to intercept the SMT036 radial (SMT VOR), just beyond the upwind end of 07L. This allowed simultaneous ops on the two 07 runways for about 80% of the time. About 18 months ago (I think) the missed approach procedures for the ILS/DME and LLZ/DME on the "sevens" was changed to the present format, and as a result, sim-ops on 07R/07L are now usable about 99% (my guess) of the time.
PS: For those not familiar with the terms "co-ordinated mode" and "Simultaneous mode", under the former, a departure from 07R needs to have commenced take-off roll before an arriving aircraft on 07L reaches 4NM from touch-down. The latter term speaks for itself.
I would need to look at the two 07 charts to check on the exact turn point for both the ILS and the LLZ approaches, but to answer the second part of your question, it's not "terrain" that is the issue, it's to facilitate improved operations (ATC) at the airport.

[Loopdeloop]

Wonder what the oztronauts think about whether our 400' limitation applies. Of course the limitation in the book appears only to apply for take-off but I'm sure a good long discussion could ensue involving difference of opinion, sop and limitations...

[White None]

The difference it makes to any possible impingement on terrain clearance is Zip so...... shall we go to the bar?

[mcdude]

The LOC 07L approach is non-precision therefore it requires a MAPt which is at D0.2 NM IZSL. This is the point where you would turn left onto 058 degrees.

[JammedStab]

Originally Posted by Loopdeloop

Wonder what the oztronauts think about whether our 400' limitation applies. Of course the limitation in the book appears only to apply for take-off but I'm sure a good long discussion could ensue involving difference of opinion, sop and limitations...

When do you normally select LNAV on a missed approach....400 feet?

[Loopdeloop]

It automatically activates above 200' with the autopilot engaged or above 50' if it isn't.

[falconeasydriver]

It automatically activates above 200' with the autopilot engaged or above 50' if it isn't.

Is that Rad ALT or AGL?

[JammedStab]

Originally Posted by Loopdeloop

It automatically activates above 200' with the autopilot engaged or above 50' if it isn't.

On which aircraft type would that be?

[Loopdeloop]

I came in with a slightly tongue in cheek comment whilst bored and half cut and I get the Spanish Inquisition... but as you asked:

It's rad alt, and the senior fleet!

[Bedder believeit]

Just out of curiosity (as a non-aviator) where abouts on a large modern aicraft do the "Altitude readouts" etc relate to, originate from, or are measured from? At 100' as per the voice callout, is that from the RadAlt sensor (and where is it normally located) or from the lowest of the main undercarriage wheels, or the Pilot's bottom...where? Just out of curiosity!
I hope I don't start another Airbus v Boeing deal
I can probably take one more aviator on the ATC tour on the 3rd Jun if anyone is interested. Would need to be in terminal 1 at 8 to 8:30, left hand crew/staff entrance next to the police post on the Dep's level. Thanks

[JammedStab]

Radalt antennas are on the belly of the 744. Is this the senior fleet at CX.

[744drv]

Certainly based on aircraft age!! Radalt readings are corrected to give first main gear touchdown at "zero feet" as a result get a slight negative reading as you taxi around.

[JammedStab]

Thanks. -8 feet seems to be the number when firmly on the ground I believe. We normally select LNAV at 400 feet on a missed approach. Not sure why the wait as it comes on at 50 feet on departure. Perhaps just to give time to get the important stuff out done. I guess you just select LNAV earlier on this missed approach.

Is that what those very precise CX sim instructors expect?