Advisory Circular (AC) No. 301-001

Procedure to be followed in order to support Instrument Approach Procedures (IAP) at a non-certified aerodrome

Issuing Office: Standards    
Activity Area: Education AC No.: 301-001
File No.: A 5100-1 P/A Issue No.: 01
RDIMS No.: 4014811v7 Effective Date: 2008-10-01

1.0  INTRODUCTION

This Advisory Circular (AC) is provided for information and guidance purposes.  It may describe an example of an acceptable means, but not the only means of demonstrating compliance with regulations and standards. This AC on its own does not change, create, amend or permit deviations from regulatory requirements nor does it establish minimum standards.

1.1  Purpose

The purpose of this Advisory Circular (AC) is to provide operators of non-certified aerodromes with a set of instructions that outlines the procedure to be followed in order to support Instrument Approach Procedures  (IAP) at a non-certified aerodrome.

1.2  Applicability

This document is applicable to operators of all non-certified aerodromes, registered aerodromes, TCCA headquarters and regional Aerodromes and Air Navigation divisional personnel, IAP designers and is also available to the aviation industry for information purposes.

1.3  Description of Changes

No Change

2.0  REFERENCES AND REQUIREMENTS

2.1  Reference Documents

It is intended that the following reference materials be used in conjunction with this document:

  1. Aeronautics Act;

  2. Part VIII Subpart 3 of the Canadian Aviation Regulations  (CARs) – Aeronautical Information Services;

  3. CAR 803.02 – Development and Publication of Instrument Procedures;

  4. Transport Publication (TP) 308/GPH 209, dated 2008-01-01 - Criteria for the Development of Instrument Procedures;

2.2  Cancelled Documents

As of the effective date of this document, the following document is cancelled:

  1. Aerodrome Safety Circular (ASC) 2003-019; Procedures to Complete an Aerodrome Operator Attestation to Support an Instrument Approach Procedure, dated 2003-01-10;

2.3  Definitions and Abbreviations

IAP means Instrument Approach Procedure;

NOTE: Refer to Aerodrome Physical Characteristics (Table 2) of this document for the description of terms used to complete the Aerodrome Operator Attestation (Appendix A).

3.0  BACKGROUND

  1. Section 803.02 of the Canadian Aviation Regulations  (CARs) regulates the development of civil instrument procedures in Canada through the standards manual entitled Criteria for the Development of Instrument Procedures, known as TP 308. Paragraph 120(a) of this document requires that specific aerodrome standards be met before an IAP is authorized.

  2. The rationale for linking the aerodrome standards and TP 308 is to ensure that a specific obstacle-free environment is provided in the vicinity of the non-certified aerodrome to support the visual segment of an IAP.

4.0  REQUIREMENT

  1. The aerodrome attestation form is required to support public IAPs at non-certified aerodromes.

  2. This attestation is also required to obtain minima lower than 500 ft for restricted IAPs.

4.1  Procedure

  1. Table 1, attached, specifies the type of instrument procedure, the associated minima and application (public or restricted use) authorized for any combination of navigation aid (NAVAID capability versus the landing surface and applicable aerodrome design requirements)/approach system.

  2. The procedure that a non-certified aerodrome operator is to follow in order to support a public IAP or a restricted IAP with minima lower than 500 ft is outlined in this section.

    1. The aerodrome operator is responsible to ensure an assessment of the “Aerodrome Physical Characteristics” is conducted.  It is expected that a qualified person will conduct the assessment.

    2. The aerodrome operator must ensure an assessment is conducted for each runway for which an IAP is published.  The assessment is based on the minimum requirements for the critical aircraft specified in Table 2, “Aerodrome Physical Characteristics,” attached. Figure 1 is provided to illustrate the obstacle limitation surface terminology used in Table 2.

    3. The aerodrome operator is responsible for gathering all the required information to complete the Aerodrome Operator Attestation (Appendix 1), and providing a signed copy of the attestation form along with the assessment results, to the IAP designer. This information and the attestation provides the IAP designer with the documentation to confirm compliance with the requirements set out in paragraph 120(a) of TP 308.

5.0  SUMMARY

It is the aerodrome operator’s responsibility to ensure an assessment is completed for each runway for which an IAP is published.  Aerodrome operators are also responsible to provide a signed copy of the Aerodrome Operator Attestation and the results of the assessment to the IAP designer. In addition, the aerodrome operator has an ongoing responsibility to advise NAV CANADA of any change or modification to the information submitted in the Attestation.

6.0  CONTACT OFFICE

For more information please contact:
The appropriate Transport Canada Regional Office listed in Appendix B

Suggestions for amendment to this document are invited and should be submitted via the Transport Canada Civil Aviation Issues Reporting System (CAIRS) at the following Internet address:

www.tc.gc.ca/CAIRS

or by e-mail at: CAIRS_NCR@tc.gc.ca

D.B. Sherritt
Director, Standards (AART)
Civil Aviation



APPENDIX A – AERODROME OPERATOR ATTESTATION

I attest that the most critical aircraft, based on wingspan, to be used by operators at the aerodrome is

__________________________________.
           (Type of aircraft)
               

I attest that the information, as specified below, on Aerodrome Physical Characteristics provided for

__________________________________ is accurate,
            (Name of aerodrome)

and I further agree to maintain the physical characteristics of the aerodrome in the same, or improved, condition as they were on the date of the signing of this document. Failing this, I agree to immediately inform NAV CANADA of any change or modification of the aerodrome characteristics in order that an assessment of the continuing validity of these procedures be made.

___________________________      ______
Signature of Aerodrome Operator       Date

AERODROME PHYSICAL CHARACTERISTICS
RWY ID Threshold Elevation (feet) RWY Orientation (degrees)
Threshold Coordinates (1/100 sec) TYPE OF RUNWAY
Non-Instrument Runway Non-Precision Runway
AIRCRAFT SIZE
(Enter Aircraft wing span)
   
CHARACTERISTICS
Strip Specifications:  
Strip width (each side of centre line) __________ m (ft) __________ m (ft)
Strip length
(Prior to threshold and beyond departure end)
__________ m (ft) __________ m (ft)
Approach / Take-off
Slopes and
Dimensions:
 
Length of the inner edge __________ m (ft) __________ m (ft)
Distance from threshold __________ m (ft) __________ m (ft)
Divergence (minimum each side) __________ % __________ %
Length (minimum) __________ m (ft) __________ m (ft)
Slope (maximum) __________ %
(1:_____)
__________ %
(1:_____)
Transition Surfaces (Slope) __________ %
(1:_____)
__________ %
(1:_____)
Note:
(1) Aircraft with wingspans greater than 52 m (171 ft) and wider will be evaluated individually.
(2) A form is required for each runway served by an instrument approach procedure.

TABLE 1 – INSTRUMENT PROCEDURE AND MINIMA AUTHORIZED VERSUS AERODROME OPERATOR ATTESTATION

Non-Certified Aerodrome TP 308
NAVAID / Approach System Capability Type of Runway Type of Procedure Minima Authorized Application
Precision Non-Precision PA, NPA or APV DH, MDA or DA not lower than 250 feet HAA/HAT Public or Restricted
Precision Non-Instrument PA, NPA or APV DH, MDA or DA not lower than 500 feet HAA/HAT Public or Restricted
Non-Precision/ APV Non-Precision NPA or APV MDA or DA not lower than 250 feet HAA/HAT Public or Restricted
Non-Precision/ APV Non-Instrument NPA or APV MDA or DA not lower than 500 feet HAA/HAT Public or Restricted

APV: Approach Procedure with Vertical Guidance
DA: Decision Altitude
DH: Decision Height
HAA: Height Above Aerodrome
HAT: Height Above Touchdown Zone Elevation
MDA: Minimum Descent Altitude
NPA: Non-precision Approach
PA: Precision Approach

Level of precision of the information provided:
Threshold elevation: elevation shall be given to the nearest foot
Threshold coordinates: the geographic coordinates of the runway threshold shall be given to the nearest 1/100 of a second.
Runway Orientation: bearings shall be given to the nearest degree.

TABLE 2 – AERODROME PHYSICAL CHARACTERISTICS

AERODROME PHYSICAL CHARACTERISTICS
Minimum Requirements
  TYPE OF RUNWAY
Non-Instrument Runway Non-Precision Runway
AIRCRAFT SIZE
(Based on wing span)
Up to but not including 15 m
(49 ft)
15 m
(49 ft)
 up to but not including 24 m
(79 ft)
24 m
(79 ft)
up to but not including 36 m
(118 ft)
36 m
(118 ft) up to but not including 52 m
(171 ft)*
Up to but not including 15 m
(49 ft)
15 m
(49 ft)
up to but not including 24 m
(79 ft)
24 m
(79 ft)
up to but not including 36 m
(118 ft)
36 m (118 ft)
up to but not including 52 m
(171 ft)*
CHARACTERISTICS
Strip Specifications:  
Strip width (each side of centre line) 30 m
(98.5 ft)
30 m
(98.5 ft)
45 m
(148 ft)
75 m
(246 ft)
45 m
(148 ft)
45 m
(148 ft)
75 m
(246 ft)
150 m
(492 ft)
Strip length
(Prior to threshold and beyond departure end)
30 m
(98.5 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
Approach / Take-off Slopes and Dimensions:                
Length of the inner edge 60 m
(197ft)
60 m
(197 ft)
90 m
(295ft)
150 m
(492ft)
90 m
(295ft)
90 m
(295ft)
150 m
(492ft)
300 m
(984ft)
Distance from threshold 30 m
(98.5ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
60 m
(197 ft)
Divergence (minimum each side) 10% 10% 10% 10% 10% 10% 15% 15%
Length (minimum) 2500 m
8202 ft
2500 m
8202 ft
2500 m
8202 ft
2500 m
8202 ft
2500 m
8202 ft
2500 m
8202 ft
3000 m
9843 ft
3000 m
9843 ft
Slope (maximum) 5%
(1:20)
4%
(1:25)
2.50%
(1:40)
2.50%
(1:40)
3.33%
(1:30)
3.33%
(1:30)
2.50%
(1:40)
2.50%
(1:40)
Transition Surfaces (Slope) 20.00%
(1:5)
20.00%
(1:5)
14.30%
(1:7)
14.30%
(1:7)
14.30%
(1:7)
14.30%
(1:7)
14.30%
(1:7)
14.30%
(1:7)
NOTE * : aircraft of 52 m (171 ft) and wider will be evaluated individually.
DEFINITIONS:
  1. Obstacle Limitation Surface (OLS). A surface that establishes the limit to which objects may project into airspace associated with an aerodrome so that aircraft operations at the aerodrome may be conducted safely. Obstacle limitation surfaces consist of the following:

    1. Take-off/Approach Surface. An incline plane beyond the end of the runway and preceding the threshold of a runway. The origin of the plane comprises:

      1. An inner edge of specified length (strip width), perpendicular to and evenly divided on each side of the extended centre line of the runway, and beginning at the end of the runway strip;

      2. Two sides originating at the ends of the inner edge, diverging uniformly at a specified rate in the direction of take-off;

      3. The elevation of the inner edge is equal to the elevation of the threshold.

    2. Transitional Surface. A complex surface sloping up at a specified rate from the side of the runway strip and from part of the take-off/approach surface. The elevation of any point on the lower edge of the surface is:

      1. Along the side of the take-off/approach surface, equal to the elevation of the take-off/approach surface at that point; and,

      2. Along the runway strip, equal to the elevation of the centreline of the runway, perpendicular to that point.

  2. Strip. An area of specified dimensions enclosing a runway, intended to reduce the risk of damage to aircraft running off a runway, and to protect aircraft flying over it during take-off and landing operations.

APPENDIX B – LIST OF TRANSPORT CANADA AERODROME SAFETY REGIONAL OFFICES

  1. Pacific Region
    Office of Aerodrome Safety
    820-800 Burrard St.
    Vancouver, B.C.
    V6Z 2J8
    Phone: (604) 666-2103
    Fax: (604) 666-1175

  2. Prairie &Northern Region
    Office of Aerodrome Safety
    PO Box 8550
    344 Edmonton
    Winnipeg, Manitoba
    R3C OP6
    Phone: (204) 983-4335
    Fax: (204) 983-0281

    Office of Aerodrome Safety
    1100 Canada Place
    9700 Jasper Avenue
    Edmonton, Alberta
    T5J 4E6
    Phone: (780) 495-3850
    Fax: (780) 495-5190

  3. Ontario Region
    Office of Aerodrome Safety
    4900 Yonge St.
    Suite 300
    North York, Ontario
    M2N 6A5
    Phone: (416) 952-0335
    Fax: (416) 952-0050

  4. Quebec Region
    Office of Aerodrome Safety
    700 Leigh Capréol, Suite 4086
    Dorval, Quebec
    H4Y 1G7
    Phone: (514) 633-3252
    Fax: (514) 633-3052

  5. Atlantic Region
    Office of Aerodrome Safety
    P.0. Box 42
    95 Foundry Street
    Moncton N.B.
    E1C 8K6
    Phone: (506) 851-3342
    Fax: (506) 851-3022

FIGURE 1 – OBSTACLE LIMITATION SURFACES

Figure 1 - Obstacle Limitation Surfaces

Click on image to enlarge

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