MALSRMedium-Intensity Approach Lighting System with Runway Alignment Indicator
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The same goes for MALSRs, REILs, and other lighting arrays that are located on or beyond the runway threshold.
Let's put this into action at the Raleigh-Durham (KRDU) RNAV (GPS) Y Runway 23L approach (with MALSR).
DISTANCES ON THREE-DEGREE GLIDESLOPE DISTANCE TO: ALTITUDE MALSR, SSALR, AGL ALSF MALS, SSALS THRESHOLD TOUCHDOWN 100 -1490 -490 910 1910 200 420 1420 2820 3820 250 1376 2376 3776 4776 300 2332 3332 4732 5732 350 3287 4287 5687 6687 400 4242 5242 6642 7642 450 5197 6197 7597 8597 500 6153 1753 8553 9553 550 7108 8108 9508 10,508
If your approach is an ILS or LPV with minimum visibility less than 3/4-mile, then it must have an ALSF-2 or -1, a SSALR or MALSR. Interestingly, for higher visibility minimums an ALS is only "recommended" by TERPS, not required.
(3) VOR, VOR/DME, TACAN, LOC, LOC/DME, LDA, LDA/DME, SDF, SDF/DME, GPS, ASR and RNAV (LNAV/VNAV and LNAV line of minima) Inoperative Visual Aid Approach Category Increase visibility ALSF 1 & 2, MALSR, & SSALR ABCD 1/2 mile SSALS,MALS, & ODALS ABC 1/4 mile Along those lines, DME is often used to identify step-down fixes and as a result many approaches have a note "DME Required." If the DME is NOTAM'd out, then the approach might be considered NA.
In "Hocus Focus in Vermont" (March 2010 IFR), the author states, "the LOC Z requires the CHITT FIX minimums to be increased for an inoperative MALSR," and again, "The lower altitude and visibility is why you must have a working MALSR."
I've briefed the LOC Z approach until my eyes blurred (I like Hocus Focus exercises), but can't find a specific reference to "MALSR out" in the mini-mums section.
Both the PAPI for Runway 30R and the MALSR for that runway (indicated by the As in a circle) are pilot-controlled.
You can descend to 100 feet above TDZE using any approach lighting system (and a MALSR doesn't have red terminating bars anyway).
In the minimums section (or the briefing bar on NACO plates) you'll find that LOC Z requires the CH1TT FIX minimums to be increased for an inoperative MALSR. The LOC Y has standard lighting out requirements.