CASA 407/98 Instructions under regulation 235A specifying the minimum runway width for aeroplanes (Cth)

INSTRUMENT NUMBER:  CASA 407/98

CIVIL AVIATION ACT 1988

CIVIL AVIATION REGULATIONS 1988

INSTRUCTIONS UNDER REGULATION 235A

I, MICHAEL ROBERT TOLLER, Director of Aviation Safety:

(1)    revoke instrument number CASA 99/95;  and

(2)    under regulation 235A of the Civil Aviation Regulations 1988, issue the following instructions.

[Signed M. Toller]

Mick Toller

Director of Aviation Safety

15 December 1998

Instructions under regulation 235A specifying the minimum

runway width for aeroplanes

Interpretation

1.1   For the purposes of these instructions, an aeroplane’s reference field length is:

(a)  in the case of an aeroplane to which section 20.7.1B of the Civil Aviation Orders applies — the balanced field length;  or

(b)  in the case of any other aeroplane — the take-off distance;

that the aeroplane requires for take-off in accordance with paragraph 1.2.

1.2   For the purposes of paragraph 1.1, the balanced field length or take-off distance that an aeroplane requires for take-off is the balanced field length or take-off distance that, according to its flight manual, the aeroplane requires:

(a)  on a level runway;  and

(b)  at maximum take-off weight;  and

(c)  in still air;  and

(d)  at sea level;  and

(e)  in standard atmospheric conditions.

1.3   For the purposes of these instructions, an aeroplane’s code number is the number set out in column 1 of Table 1 opposite the range of distances in column 2 of the Table that includes the aeroplane’s reference field length.

1.4   For the purposes of these instructions, to work out an aeroplane’s code letter:

(a)  determine its wing span and outer main gear wheel span;  and

(b)  then determine:

(i)  which letter in column 3 of Table 1 is opposite the range of wing spans in column 4 of the Table that includes the aeroplane’s wing span;  and

(ii)  which letter in column 3 of the Table is opposite the range of outer main gear wheel spans in column 5 of the Table that includes the aeroplane’s outer main gear wheel span.

1.5   If the same letter is determined under sub-subparagraphs 1.4 (b) (i) and (ii), that letter is the aeroplane’s code letter.

1.6   If different letters are determined under sub-subparagraphs 1.4 (b) (i) and (ii), the aeroplane’s code letter is the one that occurs later in the alphabet.

TABLE 1

AERODROME REFERENCE CODE

Column 1	Column 2	Column 3	Column 4	Column 5
Code number	Aeroplane reference field length	Code letter	Wing span	Outer main gear wheel span
1	Less than 800 metres	A	Less than 15 metres	Less than 4.5 metres
2	At least 800 metres but less than 1,200 metres	B	At least 15 metres but less than 24 metres	At least 4.5 metres but less than 6 metres
3	At least 1,200 metres but less than 1,800 metres	C	At least 24 metres but less than 36 metres	At least 6 metres but less than 9 metres
4	At least 1,800 metres	D	At least 36 metres but less than 52 metres	At least 9 metres but less than 14 metres
E	At least 52 metres but less than 65 metres	At least 9 metres but less than 14 metres

Minimum runway width for an aeroplane

2.1   Subject to paragraphs 3.1, 3.2 and 4.1, the minimum runway width for an aeroplane is the distance specified in Table 2 at the intersection of:

(a)  the row in the Table that specifies the aeroplane’s code number;  and

(b)  the column in the Table that specifies its code letter.

TABLE 2

MINIMUM RUNWAY WIDTHS UNDER PARAGRAPH 2.1

Code letter
Code number	A	B	C	D	E
1	18 m	18 m	23 m	-	-
2	23 m	23 m	30 m	-	-
3	30 m	30 m	30 m	45 m	-
4	-	-	45 m	45 m	45 m

Minimum runway width applicable to certain aeroplanes

3.1   Paragraph 3.2 applies to the following aeroplanes:

(a)  an aeroplane for which a narrower runway width than that applicable under clause 2.1 is specified in Table 3.1, 3.2 or 3.3 in Advisory Circular 150/5300-13 issued by the Federal Aviation Administration of the United States of America;

(b)  an aeroplane that:

(i)  has an aeroplane reference field length of less than 1,500 metres;  and

(ii)  for the purpose of taking off or landing — has the crosswind limits specified in its flight manual reduced by 50 per cent.

3.2   The minimum runway width for an aeroplane to which this paragraph applies is the distance specified in Table 3 at the intersection of:

(a)  the row in the Table that specifies the aeroplane’s code number;  and

(b)  the column in the Table that specifies its code letter.

TABLE 3

MINIMUM RUNWAY WIDTHS UNDER PARAGRAPH 3.2

Code letter
Code number	A	B	C	D	E
1	15 m	15 m	18 m	-	-
2	18 m	18 m	23 m	-	-
3	23 m	23 m	23 m	30 m	-
4	-	-	30 m	45 m	45 m

Minimum runway width for aeroplanes with maximum take-off weight not more than 5,700 kilograms

4.1   The minimum runway width for an aeroplane that:

(a)  has a maximum take-off weight of not more than 5,700 kilograms;  and

(b) is taking off from, or landing at, a place in accordance with paragraph 92 (1) (d) of the Civil Aviation Regulations 1988;

is 10 metres.