Federal Aviation Administration

Flight Procedure Standards Branch

Policy Clarification

TERPS Instruction Letters (TILS)

TIL Number Title Attachments
99-003 (PDF) Taxiing Aircraft as Departure Obstructions; AVN-160 E-Mail N/A
00-009 (PDF) Successive Fly-over Waypoints YES (PDF)
00-016 (PDF) Interim United States Army Helicopter Departure Criteria YES (PDF)
01-020 (PDF) FAA Order 8260.44 Interim Change 1 N/A
01-024 (PDF) Construction Criteria for Leg Segments VA to CF YES (PDF)
01-025 (PDF) Turning Area Curve Radii at 10,000 Feet MSL N/A
02-042 (PDF) Area Navigation (RNAV) "Q" Route Processing N/A
02-043 (PDF) United States Standard for TERPS Change 19, Correction #1 YES (PDF)
03-048 (PDF) Interim Correction to Order 8260.3B, United States Standard for Terminal Instrument Procedures (TERPS) YES (PDF)

Policy Memorandums

Date Title Attachments
Feb 11, 1999 Special IFR Helicopter GPS Point-In-Space (PinS) Approaches (PDF) Atch 1 (PDF) Atch 2 (PDF)
Dec 7, 2001 Minimum Segment Altitudes and Required Obstacle Clearance (ROC) (PDF) N/A
Sep 5, 2003 Instrument Departure Criteria in Terminal Instrumental Procedure 903 (PDF) N/A
Dec 4, 2003 Directive Feedback Information Order 8260.3B (TERPS), TERPS Control 03-01 (PDF) N/A
Jan 5, 2004 Clarification of Precision Obstacle Free Area (POFA) (PDF) N/A
Jun 17, 2004 Interim Guidance for Evaluating Area Navigation (RNAV) Holding Patterns (PDF) N/A
Jun 18, 2004 Automated Precipitous Terrain Adjustments (PDF) N/A
Dec 6, 2004 Application of Short Take Off Landing (STOL) Holding Pattern Criteria (PDF) N/A
Mar 17, 2005 Revised Policy for Application of Volume 4, Para 1.3, FAA Order 8260.3B, US Standard for (TERPS) (PDF) N/A
Jul 7, 2005 Policy on Use of 175 Knots Indicated Airspeed (KIAS) Holding Pattern (PDF) N/A
Dec 6, 2005 Clarification of TERPS Glide Path Angle Standard (PDF) N/A
Feb 3, 2006 Clarification 4 to FAA Order 8260.52, United States Standard for Required Navigation Performance (RNP) Approach Procedures with Special Aircraft and Aircrew Authorization Required (SAAAR) (PDF) N/A
Feb 23, 2006 Implementation of the Airport Obstructions Standards Committee (AOSC) Decision Document (DD) 4 for Existing Category (CAT) II/III Approach Procedures (PDF) N/A
Mar 22, 2006 Application of Obstacle Accuracy Uncertainty, FAA Order 8260.52, United States Standard for Required Navigation Performance (RNP) Approach Procedures with Special Aircraft and AIrcrew Authorization Required (SAAAR) (PDF) N/A
Apr 25, 2006 Correction to RNP SAAAR Clarification Memo 4 (PDF) N/A
Nov 14, 2006 Remote Altimeter Setting Source (RASS) Adjustment and Notice to Airmen (NOTAM) Association with Helicopter Point-in-Space (PinS) and Instrument Flight Rules (IFR) to a Visual Flight Rules (VFR) Heliport (IVH) Instrument Approach Procedure (IAP) (PDF) N/A
Nov 27, 2006 Interim Guidance for GPS Holding Leg Length (PDF) N/A
Feb 1, 2007 Area Navigation (RNAV) Terminal Instrument Procedures (TERPS) Geospatial Standards for Procedure Development Automation (PDF) N/A
Feb 26, 2007 Area Navigation (RNAV) Turn Altitude Determination (PDF) N/A
Mar 8, 2007 Clarification of Intent of FAA Order 8260.3B, United States Standard for Terminal Instrument Procedures (TERPS), Volume 1, Paragraph 1720 (PDF) N/A
Mar 30, 2007 Continuous Descent Angle on Instrument Procedures (PDF) N/A
Apr 24, 2007 Category-I Instrument Landing System (ILS) End Fire Glide Slope (EFGS) Antenna Obstacle Evaluation (PDF) N/A
Dec 17, 2007 (Supersedes Nov 2, 2006) Use of Heading to an Intercept (VI) Legs on Area Navigation (RNAV) Departures (PDF) N/A
Dec 28, 2007 Implementation of Order 8260.3B, U. S. Standard for Terminal Instrument Procedures (TERPS), Change 20 (PDF) N/A
Jan 15, 2008 Implementation of Order 8260.54A, United States Standard for Area Navigation (RNAV) (PDF) N/A
Mar 3, 2008 Transponder Landing System (TLS) Design Criteria (PDF) N/A
Mar 14, 2008 Correction to Order 8260.52, U.S. Standard for Required Navigation Performance (RNP) Approach Procedures with Special Aircraft and Aircrew Authorization Required (SAAAR) (PDF) N/A
July 30, 2008 Clarification of Order 8260.3B, United States Standard for Terminal Instrument Procedures (TERPS), Change 20, and Order 8260.49A, Simultaneous Offset Instrument Approach (SOIA) (PDF) N/A
Aug 28, 2008 Localizer Directional Aid (LDA) with Glide Slope Procedure Construction Criteria (PDF) N/A
Dec 8, 2008 Clarification of Order 8260.3B, United States Standard for Terminal Instrument Procedures (TERPS), Paragraph 1750d (PDF) N/A
Dec 8, 2008 Cancellation of Memorandum for Houston Intercontinental Airport Simultaneous Area Navigation/Instrument Landing System Authorization (PDF) N/A
August 17, 2009 Policy Clarifications Associated with FAA Order 8260.3B, United States Standard for Terminal Instrument Procedures (TERPS), Change 21 (PDF) N/A
September 16, 2009 Corrections to Embedded Calculators/Formulas and References in FAA Order 8260.54A,The United States Standard for Area Navigation (PDF) N/A
December 30, 2009 Updated Criteria for Airship Area Navigation (RNAV) Approach Procedures (PDF) N/A
June 22, 2010 Clarification on Missed Approach Climb Gradient Application (PDF) N/A
Sept 24, 2010 Determining Average Cold Temperature (ACT) for Barometric Vertical Navigation (baro-VNAV) Based Approach Procedures (PDF) Download Calculation Tool (HTML)
Oct 1, 2010 Cancellation of AFS-1 Memorandum to AVN-1, dated October 7, 2003 (PDF) N/A
Oct 19, 2010 Harmonized Flight Instrument Procedure Design Calculations (PDF) N/A
Oct 25, 2010 Use of Step-Down Fixes for Obstruction Evaluation/Airport Airspace Analysis (OE/AAA) Mitigation (PDF) N/A
Nov 16, 2010 Clarification of Remote Altimeter Setting Source (RASS) Application to Missed Approach Surface Elevations (PDF) N/A
Nov 16, 2010 Low Close-In Obstacles and Obstruction Evaluation/Airport Airspace Analysis (OE/AAA) Mitigation (PDF) N/A
January 11, 2011 Clarification of Locating the Flight Path Alignment Point (FPAP) on Wide Area Augmentation System (WAAS) Approach Procedures (PDF) Download Calculation Tool (ZIP)
February 9, 2011 United States Standard for Locating the Precise Final Approach Fix (PFAF, FAF) On Instrument Approach Procedures and Locating Fixes for Air Traffic Control (ATC) Vertical Separation Purposes (PDF) Download Calculation Tool (ZIP)
June 23, 2011 Ground Based Augmentaton System Landing System (GLS) Procedure Design Guidance (PDF) N/A
August 11, 2011 Landing Threshold Geodetic Datum (PDF) Download Calculation Tool (ZIP)
August 16, 2011 Interim Criteria for Precision Approach Obstacle Assessment and Category II/III Instrument Landing System (ILS) Requirements (PDF) N/A
August 17, 2011 Guidance Clarification for FAA Order 8260.19E, Airspace and Procedures, Paragraph 4-3b, Airspace Requirements (PDF) N/A
September 7, 2011 Heading to an Altitude (VA) Followed by a Direct-to-Fix (DF) Segment Design Analysis (PDF) Download Departure Calculation Tool (ZIP)
October 3, 2011 Revised Performance Based Navigation (PBN) Fly-By (FB) / Radius-to-Fix (RF) Turn Maximum Bank Angle Limits; Omni-Directional Tailwind Requirements; and Minimum Initial Departure Leg Segment Length Design Criteria (PDF) N/A
December 29, 2011 Standard Threshold Crossing Height (TCH) Values (PDF) N/A
January 12, 2012 Required Navigation Performance (RNP) 1 Departure Procedures (DP) (PDF) N/A
February 6, 2012 Performance Based Navigation (PBN) Instrument Procedure Minimum Segment Length Standard (PDF) N/A
June 6, 2012 Low/High Temperature Limits for Barometric Vertical Navigation (Baro-VNAV) Based Approach Procedures (PDF) Download Calculation Tool (PDF)

Page Last Modified: 06/13/12 08:24 EDT

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