121 obstacle dep.

[wood pecker]

For 121 ops are you required to fly obstacle dep if there is not any data in airport analysis manual? I know on T/O, if we have an engine failure we are to fly straight out to 1500 before turning unless our analysis manual advises otherwise.

 

[strega7]

Under 121 (part 25 and ops specs) you must fly something that will keep you out of the dirt if you bark a motor. It becomes a factor when departing SBP with a VFR climb. You must follow the special departure procedure, obstacle departure procedure, or SID procedure ground track to at least 1500 feet. The same language that allows you to do a visual approach and avoid obstacles is the same in the paragraph allowing you to do VFR departures. Don't know if this helps.

Later,

 

[JumpJetter]

Actually...

Actually...(and this applies to Pt 135 too)

SBP is a good example, you have a Special Departure proceedure there, because in your Skywest Brasilia, if you "barked" a motor there is no way you could comply with the SID or the Obsticle DP with one engine. SO to ensure you don't get trapped in there, and are never able to depart, Skywest (and other airlines too) have someone (probably Jepp) work up some obsticle clearance numbers that basically have you follow the lowest terrain....called a Special Departure Proceedure.

VFR - technically all you have to do is remain clear of terrain and be able to remain VFR (assume you've declared and emergency when the engine fails).

So for both 135 and 121 you have to ask yourself on the ground if it is IFR:

(1) Can I comply with the climb gradient on the SID I plan to fly? if no:
(2) Is there another SID with a lower climb gradient? -or/if no-
(3) Can I fly the published Obsticle Departure Proceedure (which may have a lower climb gradient than the SID) -if no-
(4) Or does my company have a published Special Departure Proceedure THAT I ONLY FOLLOW IF I LOSE AN ENGINE and am unable to remain VFR.

Burbank is another good example. All the SIDs have a pretty steep climb gradient. Also all the obstacle departure proceedures have a greater than standard climb gradient, except runway 24. It allows you to fly straight to the VNY VOR, turn around and depart out the V386, all of which keeps you out of the terrain surrounding BUR.

I didn't quote alot of regs, I'm sure someone will.

JJ