Climb Performance Terps Vs Far25

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01-21-2009 | 07:24 PM

terpster

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Climb Performance Terps Vs Far25

Terps requires 3.3% climb gradient or as published and far 25 requires 2.4% in the 2nd segment and 1.2% in the final segment (2 engine aircraft). Assume a 500/500/500 take off and no published climb gradient. At what altitude should you clean up and accelerate to enroute climb speed MVA/MSA/MEA or a training profile altitude 400/1500 AGL? Assume no airport analysis and AFM shows greater than 3.3% to a safe altitude.

Seems to me that your 2nd segment configuration will give the least horizontal flight path to a safe altitude since far 25 doesn't consider terrain environment.

Thanks for your responses.

01-21-2009 | 10:57 PM

b18onboost

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From: Do whatever the captain tell me

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02-05-2009 | 10:04 PM

KC10 FATboy

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From: Legacy FO

You are confusing what TERPS says an aircraft must climb to takeoff and avoid obstacles (if no obstables are listed) and what Part 25 says an aircraft must be able to achieve as designed.

02-06-2009 | 07:58 AM

rickair7777

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From: Engines Turn or People Swim

Quote:

Originally Posted by KC10 FATboy

You are confusing what TERPS says an aircraft must climb to takeoff and avoid obstacles (if no obstables are listed) and what Part 25 says an aircraft must be able to achieve as designed.

FAR 25 is for transport category aircraft, so you would THINK those standards would be set with IFR operations in mind...but maybe not.

My guess is that all transport category aircraft can easily exceed that 2.4% climb gradient...it's just a design minimum.

03-16-2009 | 06:06 AM

aterpster

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From: Former ALPA TERPs rep, presently NBAA RNP rep

Quote:

Originally Posted by terpster

Apples and oranges. TERPs is for normal ops. One engine inoperative (OEI) is covered by FAR 121.189, which in turn, refers to the Part 25 takeoff flight path.