PPRuNe Forums - View Single Post - Ryanair uses all the runway.
View Single Post
Old 12th Oct 2017, 23:19
  #79 (permalink)  
underfire
 
Join Date: Aug 2013
Location: PA
Age: 59
Posts: 30
Likes: 0
Received 0 Likes on 0 Posts
The 35' requirement would have been in case of an engine failure at V1 at the end of any clearway.
Sorry, but not correct. 35 feet minumum is typical screen height for all DEP, and there is no criteria for EO, thus EO must meet the minimum. (with wet pavement the clearance is 15 feet)


7. TERPS CRITERIA VERSUS ONE-ENGINE-INOPERATIVE REQUIREMENTS.
a. Standard Instrument Departures (SID) or Departure Procedures (DP) based on TERPS or ICAO Procedures for Air Navigation Services—Aircraft Operations (PANS-OPS) are based on normal (all engines operating) operations. Thus, one-engine-inoperative obstacle clearance requirements and the all-engines-operating TERPS requirements are independent, and one engine-inoperative procedures do not need to meet TERPS requirements. Further, compliance with TERPS all-engines-operating climb gradient requirements does not necessarily assure that one-engine-inoperative obstacle clearance requirements are met. TERPS typically use specified all-engines-operating climb gradients to an altitude, rather than certificated one-engineinoperative airplane performance.



10. METHODS OF ANALYSIS. Sections 121.189, 135.379, and 135.398 require that the net takeoff flightpath clears all obstacles by either 35 feet vertically or 200 feet laterally inside the airport boundary, or 300 feet laterally outside the airport boundary.

(1) The most common procedure to maximize takeoff weight when significant obstacles are present along the normal departure route is to use a special one-engine-inoperative departure routing in the event of an engine failure on takeoff. If there is a separate one-engine-inoperative departure route, then the obstacles along this track are used to determine the maximum allowable takeoff weight for that runway.


17. MISSED APPROACHES, REJECTED LANDINGS, AND BALKED LANDINGS.
a. General.
(1) Parts 121 and 135 do not specifically require an obstacle clearance analysis for oneengine-inoperative missed approaches or rejected landings. While it is not necessary to perform such an analysis for each flight, dispatch, or landing weight limitation, it is appropriate to provide information to the flightcrews on the safest way to perform such a maneuver should it be required.

Last edited by underfire; 12th Oct 2017 at 23:53.
underfire is offline