Reduced Approach Lighting
 

My company documentation refers to minima changes relating to partial appraoch lighting failures. The minima to be used are those for BALS,IALS and NALS.

However I am unable to find any charted minima referring to these failed conditions; the Jeppesen charts only show Full,Limited and No Approach lights minima.

Can anyone shed some light (no pun intended) on these conditions and what minima would be used for the BALS,IALS and NALS conditions?

Your operator should also provide you with a table for Failed or Downgraded Equipment – Effect on Landing Minima

• FULL refers to FALS
• Limited refers to IALS
• No Approach Lights refers to NALS

Definitions of Approach Light Systems

• FALS (Full Approach Light System) ICAO: Precision approach CAT I Lighting System (HIALS >720 m) distance coded centreline, Barrette centreline.
• IALS (Intermediate Approach Light System) ICAO: Simple approach lighting system (HIALS 420-719 m) single source, Barrette.
• BALS (Basic Approach Light System) Any other approach lighting system (HIALS, MIALS or ALS 210-419 m).
• NALS (No Approach Light System) Any other approach lighting system (HIALS, MIALS or ALS < 210 m) or no approach lights.

An RVR of less than 750 m may be used For Category 1 approach operations to runways with FALS (Full Approach Lighting System) (see below), Runway Touchdown Zone Lights (RTZL) and Runway Centreline Lights (RCLL) provided that the DH is not more than 200 ft.

Cat 1 with a DA between 200-210 ft, requires an RVR of:

• 550m FALS*
• 750m IALS
• 1000m BALS
• 1200m NALS

List continues for higher DA's...

Downgraded equipment (abbreviated):

• Approach lights except the last 420 m, nil effect on CAT 3 & 2, Cat 1 & NPA require IALS minimums
• Approach lights except the last 210 m, nil effect on Cat 3, Cat 2 not allowed, Cat 1 and NPA require use of NALS minima
• Approach lights, Cat 3 with DA>50ft not allowed, Cat 2 not allowed, Cat 1 & NPA require NALS minima

Many thanks Skyjob. Just the kind of information I was looking for..

BHX - EGBB
 

No problem, we have to use it regularly as demonstrated by the following NOTAMs for EGBB-BHX due to runway extension works:

Nil effect on CAT 2 or 3, IALS minima to be used: 750m RVR for ILS Cat 1

Nil effect as only supplementary TDZ Lighting U/S
Had it been Touch Down Zone Lights U/S, Cat 3B Day RVR 200M, Night RVR 300m, Cat 3A Day RVR 300m, Night RVR 550m, no effect Cat 1 and NPA

No effect except delays possible due reduced movement rate

NDB or RNAV approaches only available, NDB may not be coded in FMC

Combined with fist NOTAM, Runway 33 IALS minima to be used: 750m RVR

Cat 3 Day RVR 300m, Night not allowed, Cat 2 Day RVR 300m, Night 550m, No effect on Cat 1 and NPA

Nil effect, although if completely U/S: Day only

Combine the above to most restrictive for runway in use...

Hi again Skyjob

Thanks for the detailed explanation, very useful..

Excuse me for appearing dull, but where did you get the following info from?

An RVR of less than 750 m may be used For Category 1 approach operations to runways with FALS (Full Approach Lighting System) (see below), Runway Touchdown Zone Lights (RTZL) and Runway Centreline Lights (RCLL) provided that the DH is not more than 200 ft.

Cat 1 with a DA between 200-210 ft, requires an RVR of:
550m FALS*
750m IALS
1000m BALS
1200m NALS

I can't find a reference for these values anywhere, but you obviously have.

Cheers

Reduced Approach Lighting
 

Cat I day RVR 300m? How is that possible?

JeroenC, well spotted and corrected

EU-OPS 1, SUBPART E - All weather operations:

http://eur-lex.europa.eu/LexUriServ/...01:0238:EN:PDF

BUT...

It really doesn't matter that much, I just posted it to show you what the source is.... Where you should find the information is really in your OM-A chapter 8. Your operator has based the therein contained information on EU Ops.