Document ID: chunk:federal_register_of_legislation:F2024C01244:reg:4:p9
Version: federal_register_of_legislation:F2024C01244
Segment Type: reg
Provision Reference: reg 4 (pt 9/21)
Character Range: 165182–168003

a radius of 3 km of the aerodrome reference point. For higher performance turboprop or jet engine aircraft, CASA recommends that a larger area should be considered for the circuit or circling area.

CHAPTER 6 AERODROME PLANNING, DESIGN AND MAINTENANCE — PHYSICAL CHARACTERISTICS OF MOVEMENT FACILITIES

Division 1 Runways

6.01 Location of runway threshold

       (1) Subject to this section, as far as possible, a runway threshold must be located at the extremity of a runway.

       (2) A runway threshold must be located:

(a) for a code 1 runway — not less than 30 m; or

(b) in any other case — not less than 60 m;

        after the point at which the approach surface for aircraft using the runway meets the extended runway centreline.

       (3) Subject to subsection (2), a runway threshold may be displaced from the extremity of a runway if:

(a) the OLS would otherwise be infringed by an obstacle; or

(b) the PANS-OPS airspace would otherwise be infringed by an obstacle; or

(c) an immoveable object or structure would otherwise extend above the approach surface.

Note 1   CASA Advisory Circular (AC) 139.A-04: Applying for aerodrome authorisations, exemptions and approvals, and AC 139.C-08: Aerodrome obstacle control, as existing from time to time and freely available on the CASA website, contain important guidance on the various safety factors that an aerodrome operator should consider before displacing a runway threshold.

Note 2   Thresholds should not be displaced without consideration of aircraft operational factors, such as approach angle and LDA. Large approach angles (above 3.5 degrees) can only be flown by aircraft that have been certified for steep approaches and where the aircraft operator has received approval. Furthermore, displaced thresholds will result in a reduced LDA which may affect the safety and efficiency of the operation even if the approach angle remains at 3 degrees.

       (4) A runway threshold must be displaced from the extremity of a runway in accordance with a written direction by CASA given in the interests of aviation safety.

       (5) If a runway threshold is temporarily displaced, the aerodrome operator must:

(a) assess the revised approach splay for the OLS, and notify CASA in writing of any new obstacles in the approach surface; and

(b) recalculate the TODA, the critical obstacle gradient, and the STODA in the reciprocal direction from the displacement; and

(c) report any changes resulting from the recalculation to the AIS provider and request that a NOTAM be issued.

       (6) The aerodrome operator must set out in the aerodrome manual the details of, and reasons for, any permanent runway threshold displacement.

6.02 Runway width
    (1) For a runway with a code number mentioned in a row of column 1 of Table 6.02 (1), the