PPRuNe Forums - View Single Post - Going around > 2.5% climb gradient and 2.1% App/Clb perf 2-eng a/c
Old 28th December 2002 | 12:00
  #8 (permalink)  
hold the phone
 
Joined: Jul 2002
Posts: 10
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From: Terra Australis Incogniti
Firstly may I say thanks to the above ppruners who are assisting in this serious dilemma.

In fact rwy 07L HKG is:
222' minima with note "based on 7%"
1332' minima for 2.5% climb gradient

the other way 25R HKG is
223' based on 4%
1,321 2.5%

YES I totally agree with the other ppruners, that with engine failures in the 1st 2nd and 3rd areas of my previous posting, one has the ability to make decisions such as following the normal single out take off procedures, as its not that much of a problem as one is flying several hundreds of feet higher than the take off, as well as burning fuel off to get down to lower weight's to check the RTOW's obstacle limit weights prior to commencing the approach etc...

BUT and the BIG dangerous BUT is ONCE you are in the normal missed approach phase, you then lose an engine (or the IRE fails it on you in the sim) THE a/c MUST NOW achive 7% up to 4,500', then there's no way the aircraft is going to miss that mountain once you do the right turn. But hey your at 222+ commencing the turn back towards high ground as per Missed Approach procedures and a lot of height to climb.

Looking very closely at the overshoot procedure, there's a right turn where, one goes on a heading of 100 this takes you within 1 mile or closer of a very high hill (the one JAL nearly touched during an ILS 6 months ago) and with a stiff Notherly, it will most definetly drift you into this high hill.

I'm sure for the huge 777s/330s its no problem on s/e, BUT for 320s/737s surely this overshoot is madness.

As we all know the 2.5% Jep OCA figures aren't based on s/e BUT then, why isn't the s/e overshoot taken into account. This business nowadays takes engine out issues on take off, drift down so why not overshoot, especially for these 2 ILS'.

Is this not a problem? Because, once you are into the "normal 7% missed approach" then you suffer the engine failure, you simply can't come up with your own way of getting out of that normal overshoot by doing a left or right "Uwee" out of the overshoot procedure, as you have obstacles (HK marble)either side of you

I was wondering what do the Dragonair/Air Macau 320s China Airlines 737s pilots do in HK and/or in their sim sessions as I'm sure some psycho TRE's must have played this one out?

Thanks.
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