Professional Pilot, May 2018

Answers to TC 5 18 questions 1 d Minimum safe sector altitudes MSAs are for emergency use and normally provide 1000 ft clearance over obstructions within a 25 nm radius of the indicated facility in this case the MAWP of RW35L According to AC 90 101A Approval Guidance for RNP Procedures with AR pilots must not modify the lateral path with the exception of going Direct to Fix DF as long as that fix is prior to the FAF and does not immediately precede a radius tofix RF leg The only other authorized modification to the loaded procedure is a change of altitude and or airspeed waypoint constraints on the initial intermediate or missed approach segments i e to comply with an ATC clearance If 2 or more approaches use the same primary navigation source for a particular runway a letter starting with Z and working back through the alphabet appears in the procedure title In this case the primary navigation source is RNAV The other approach is RNAV GPS Y Rwy 35L 2 e Procedural note 1 in the Briefing Strip indicates that authorization is required AC 90 101A indicates that approval must be obtained through OpSpecs MSpecs or letters of authorization LOA Procedural note 2 indicates that GPS is required and note 3 states that for uncompensated Baro VNAV systems procedure not authorized below 6 C 22 º F or above 54 º C 130 º F A plan view note requires radar for entering the procedure from the enroute environment 3 a b AC 90 101A states that procedures with RNP values less than 03 or with RF legs require the use of an autopilot or FD driven by the RNAV system The DA of 765 ft MSL requires an RNP value of 011 and to fly the approach from SMRFF IF requires an RF leg 4 a c d Both AC 90 101A and AC 20 138D Airworthiness Approval of Positioning and Navigation Systems provide navigation equipment requirements to fly RNP approaches The aircrafts navigation system must have a Direct To function that can be activated at any time to any fix The equipment must be able to command a bank angle up to 25 to fly an RF leg above 400 ft AGL The total system error TSE must be within the RNP value requirements in this case 011 nm for at least 95 of the total flight time The navigation system must have the capability to load the entire flight procedure into the RNAV system from the onboard navigation database 5 a d According to the plan view a mandatory altitude of 4000 ft MSL applies to LIPSS and BOWTZ 6 a d Ballflag 2 requires a maximum speed of 210 KIAS from each IF to FUNNN According to the plan view a mandatory altitude of 5000 ft MSL applies to LAIDY and SMRFF IFs and a minimum altitude of 4400 ft MSL applies to CAMDY IAF Ballflag note 1 indicates that RF legs apply to all IFs but not to CAMDY IAF 7 b d A chart notation would indicate if an RNP value of less than 10 was required to fly any initial intermediate or missed approach segments The plan view shows a course of 262 from BOWTZ to MYOPE to HEGVO and a minimum altitude of 2400 ft MSL from MYOPE to HEGVO According to the table in AC 90 109A the maximum indicated airspeed for a category B aircraft flying a radius to fix leg is 150 KIAS 8 b RF legs are defined by fly by waypoints the GPS receiver anticipates the turn and displays navigation indications to begin the turn so that the aircraft does not overshoot the next flight segment The missed approach point and missed approach holding waypoint indicated by the waypoint symbol in a circle are fly over waypoints 9 a Procedural note 5 in the Briefing Strip states VGSI and RNAV glidepath not coincident VGSI angle 300 TCH 60 The threshold crossing height TCH on the profile view is 54 ft The missed approach climb to 1700 ft MSL should be initiated at the DA According to AC 90 101A changes to lower RNP values must be complete by the fix defining the leg with the lower value According to AC 20 138D it is not necessary for navigation displays particularly PFDs to include an actual navigation performance ANP or RNP accuracy value The displays only need to provide an alert if the RNP value for the specific operation cannot be met 10 a According to AIM 5 4 18 RNP AR approaches are developed based on standard approach speeds and a 200 ft nm climb gradient in the missed approach