I, PHILIPPA JILLIAN SPENCE, Director of Aviation Safety, on behalf of CASA, make this instrument under regulations 139.712, 139.772, 139.785, 139.795, 139.800 and 201.025 of the Civil Aviation Safety Regulations 1998.
[Signed P. Spence]
Pip Spence
Director of Aviation Safety
25 August 2025
MOS Part 139H Amendment Instrument 2025
1 Name of instrument
This instrument is the MOS Part 139H Amendment Instrument 2025.
Note The term “MOS” is short for Manual of Standards.
2 Commencement
This instrument commences on the day after it is registered.
3 Amendment of MOS Part 139H
Schedule 1 amends MOS Part 139H — Standards Applicable to the Provision of Aerodrome Rescue and Fire Fighting Services.
Schedule 1 Amendments
insert
Visual Surveillance System | An electro-optical system, including runway view cameras, which provides an electronic visual presentation of aircraft at an aerodrome, used to maintain surveillance of the aerodrome’s runways and “short final” approaches. |
[2] Paragraph 4.1.1.7
repeal and substitute
4.1.1.7 Vehicles must be of a single, conspicuous colour, or predominantly of a conspicuous colour.
[3] Paragraph 7.1.1.1
omit
mandatory amount
insert
minimum amount and discharge rate
[4] Paragraph 7.1.1.1, the Table
repeal and substitute
MINIMUM USABLE QUANTITIES OF FIRE EXTINGUISHING AGENTS | ||||||||
| Foam Meeting Performance | Foam Meeting Performance Level B | Foam Meeting Performance Level C | Complementary Agent | ||||
Aerodrome category | Water (L) | Discharge rate of foam solution (L/min) | Water (L) | Discharge rate of foam solution (L/min) | Water (L) | Discharge rate of foam solution (L/min) | Dry chemical powder (kg) | Discharge rate (kg/sec) |
1 | 350 | 350 | 230 | 230 | 160 | 160 | 45 | 2.25 |
2 | 1 000 | 800 | 670 | 550 | 460 | 360 | 90 | 2.25 |
3 | 1 800 | 1 300 | 1 200 | 900 | 820 | 630 | 135 | 2.25 |
4 | 3 600 | 2 600 | 2 400 | 1 800 | 1 700 | 1 100 | 135 | 2.25 |
5 | 8 100 | 4 500 | 5 400 | 3 000 | 3 900 | 2 200 | 180 | 2.25 |
6 | 11 800 | 6 000 | 7 900 | 4 000 | 5 800 | 2 900 | 225 | 2.25 |
7 | 18 200 | 7 900 | 12 100 | 5 300 | 8 800 | 3 800 | 225 | 2.25 |
8 | 27 300 | 10 800 | 18 200 | 7 200 | 12 800 | 5 100 | 450 | 4.5 |
9 | 36 400 | 13 500 | 24 300 | 9 000 | 17 100 | 6 300 | 450 | 4.5 |
10 | 48 200 | 16 600 | 32 300 | 11 200 | 22 800 | 7 900 | 450 | 4.5 |
[5] Paragraph 7.1.1.6
repeal and substitute
7.1.1.6 For aerodrome categories 1 and 2:
[6] Paragraph 7.1.2.1
repeal and substitute
7.1.2.1 After any allowed substitution of complementary agent for water under paragraph 7.1.1.5, the substitution ratio must be carefully checked by the ARFFS provider for the aerodrome, to ensure the foam solution meets the relevant performance level under the Table in paragraph 7.1.1.1.
[7] Paragraph 7.1.3.1
repeal and substitute
7.1.3.1 A reserve supply of foam concentrate, and complementary agent, with its associated propellant gas cylinders (each being a fire extinguishing agent) must be maintained at an aerodrome, in accordance with paragraph 7.1.3.1A, to replenish the quantities of the fire extinguishing agents prescribed for the relevant aerodrome category under the Table in paragraph 7.1.1.1.
7.1.3.1A For paragraph 7.1.3.1, the reserve supply must be as follows:
7.1.3.1B Any quantity of foam concentrate carried on fire fighting vehicles, which is more than that required to make the foam solution prescribed for the relevant aerodrome category under the Table in paragraph 7.1.1.1, may contribute to meeting the reserve supply percentage mentioned in subparagraph 7.1.3.1A (a).
7.1.3.1C If a delay of more than 7 days is reasonably anticipated in replenishing the quantity of any fire extinguishing agent, to meet the reserve supply percentage mentioned in paragraph 7.1.3.1A, the quantity of the reserve supply of the agent must be reasonably increased to allow for the delay.
[8] Paragraph 22.1.2.1
repeal and substitute
22.1.2.1 An aerodrome’s ARFFS FSCC must provide clear vision of the aerodrome’s runway and “short final” approaches by:
22.1.2.1A For subparagraph 22.1.2.1 (b), a visual surveillance system must not be installed at an aerodrome unless the ARFFS provider for the aerodrome has obtained CASA’s written approval for the installation.
Note: If CASA gives its approval for the installation of the system at the aerodrome, the ARFFS provider is also required to obtain CASA’s approval for the system, under regulation 139.810 of CASR, before beginning to use the system for the purpose of the ARFFS. |
[9] Paragraph 22.1.2.3
repeal and substitute
22.1.2.3 Subject to paragraph 22.1.2.3A, an aerodrome fire alarm must terminate at the aerodrome’s ARFFS FSCC.
22.1.2.3A An aerodrome fire alarm may terminate at premises other than at the aerodrome’s ARFFS FSCC if, for the premises:
[10] Paragraph 22.1.6.1
repeal and substitute
22.1.6.1 The following training facilities must be available for use at an aerodrome where an ARFFS is provided:
22.1.6.1A An ARFFS training facility mentioned in paragraph 22.1.6.1 may be located other than at an aerodrome where the ARFFS is provided if CASA has given the ARFFS provider for the aerodrome prior written approval for the location of the facility.
[11] Paragraph 22.1.7.1
repeal and substitute
22.1.7.1 If provided at an aerodrome:
22.1.7.1A For subparagraph 22.1.7.1 (a), the ARFFS provider for the aerodrome must ensure each boat is housed, berthed, stored, or otherwise located, in a way that: