AUS Notam

F9DXER

F9DXER

Well-Known Member
Came across this NOTAM. Never realized that a certain approach lighting system has 2 modes. It appears that the SSALR mode is a downgrade from ALSF2 mode. as the approach chart only shows ALS system working or not. The CAT2 is still available, no notam

Anyone know how many lights can be out and which ones before an ALS is considered OTS?

Again just seems odd.

Any thoughts?


A1706/22 NOTAMN
Q)KZHU/QMRXX/IV/NBO/A/000/999/3012N09740W005
A)KAUS
B)2212021647 C)2301052000EST
E)AUS RWY 18L ALSF-2 NOW SSALR



The Dual Mode ALSF II/SSALR approach lighting system allows Category II runways to operate in either the full ALSF II mode or in the economical SSALR mode, depending on weather conditions.

SYSTEM OPERATIONAL SPECIFICATIONS
ALSF-2 MODE
Í 300 or 500 watt PAR-56 lamps
Steady Burning Approach Lights
Í 277 steady burning lights in the 3,000 foot configuration
Í 247 steady burning lights in the 2,400 foot configuration
Sequenced Flashing Lights
Í 21 active flashers in the 3,000 foot configuration
Í 15 active flashers in the 2,400 foot configuration
Í Each unit flashes twice per second
Í Time interval between flashes of a single sequence is 16.67 milliseconds
SSALR MODE
Í 300 or 500 watt PAR-56 lamps
Í 63 steady burning lights
Í Sequenced Flashing Lights
Í 8 active flashers in the 3,000 foot configuration
Í 5 active flashers in the 2,400 foot configuration
Í Each unit flashes twice per second
Í Time interval between flashes of a single sequence is 33.33 milliseconds

Also found this

ALSF-2/SSALR
• The SSALR approach lighting system has up to eight sequenced
flashing lights and is used as part of a dual-mode approach
lighting system (ALSF-2/SSALR) when Category I conditions exist
on Category II designated runways.
 
I don’t have a C060 in front of me to reference, but this could be a situation where it becomes a SA CAT II due tot he reduced lighting.

it can be charted as a SA CAT II. Or in a situation where the full lighting isnt available, such as this notam, a full CAT II Approach can be treated as an SA CAT II.

we’ve had this happen a few times where it met the requirements but the controllers had no idea what C060 says and wouldn’t clear us for a CAT II. It’s worth a phone call to ask what they’re doing.
 
McCrosky said:
I don’t have a C060 in front of me to reference, but this could be a situation where it becomes a SA CAT II due tot he reduced lighting.

it can be charted as a SA CAT II. Or in a situation where the full lighting isnt available, such as this notam, a full CAT II Approach can be treated as an SA CAT II.

we’ve had this happen a few times where it met the requirements but the controllers had no idea what C060 says and wouldn’t clear us for a CAT II. It’s worth a phone call to ask what they’re doing.
Click to expand...
What special traiiis required for an SA CAT II besides the standard CAT II training?
 
IIRC, a standard CATII approach requires an ALSF-I or ALSF-II. Anything other than that would require an SA. The SSALR looks like it essentially turns the system into a MALSR. The main advantage would be cost savings on good weather days as probably 2/3 of the lights are turned off.
 
I checked our C60 and one restriction stated - couldn't exceed 15kts or what is in the Flt Man, whichever is more restrictive. I sent it up the chain to let those folks figure it out.
 
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