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Old 17th Jul 2007, 03:52
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Old Smokey
 
Join Date: Jun 2004
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To reinforce the comments made by BelArgUSA, the SID requirements (e.g. 3.3%) are to be met under PANS-OPS / TERPS rules for AEO (All Engines Operating).

The 2.4% (Gross) and 1.2% 4th Segment (and overall) are to be met by FAR 25 (and it's equivalents) for OEI (One Engine Inoperative).

The 2 sets of rules have virtually nothing in common, especially in terms of vertical and lateral clearance of obstacles.

For each and every Takeoff, the aircraft must be at such a weight that the FAR 25 OEI requirements may be met, and the routing and Altitude requirements RARELY agree with the normal SIDS, thus, Special Procedures (sometimes called OEI SIDS) have to be developed. If you don't carry these, then you should!!!!!!!

Depending upon the quality of the service provider, these are sometimes transparent. For example, one major service provider beginning with a J who operates from Denver and Frankfurt, does not provide any EOSID if OEI can be accomodated with maintaining Runway Track, even though the Minimum Acceleration Altitude may be well above the normal 400 feet (which, to me, makes it a special procedure). Their data also carries a longitudinal limit, usually 30 miles, after that, you're on your own - A pox on their system!

A full explanation of this would require the use of Danny's entire bandwidth, that should do for now.

Regards,

Old Smokey
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