AIM

4/3/14

5−4−37

Arrival Procedures

3.

If, after repeated advisories, the aircraft

proceeds outside the PAR safety limit or if a radical

deviation is observed, the pilot will be advised to

execute a missed approach unless the prescribed

visual reference with the surface is established.

d.

Radar service is automatically terminated upon

completion of the approach.

5

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4

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13. ILS/MLS Approaches to Parallel

Runways

a.

ATC procedures permit ILS instrument

approach operations to dual or triple parallel runway

configurations. ILS/MLS approaches to parallel

runways are grouped into three classes: Parallel

(dependent) ILS/MLS Approaches; Simultaneous

Parallel (independent) ILS/MLS Approaches; and

Simultaneous Close Parallel (independent) ILS

Precision Runway Monitor (PRM) Approaches. (See

FIG 5−4−19.) The classification of a parallel runway

approach procedure is dependent on adjacent parallel

runway centerline separation, ATC procedures, and

airport ATC radar monitoring and communications

capabilities. At some airports one or more parallel

localizer courses may be offset up to 3 degrees. Offset

localizer configurations result in loss of Category II

capabilities and an increase in decision height (50’).

b.

Parallel approach operations demand

heightened pilot situational awareness. A thorough

Approach Procedure Chart review should be

conducted with, as a minimum, emphasis on the

following approach chart information: name and

number of the approach, localizer frequency, inbound

localizer/azimuth course, glide slope intercept

altitude, decision height, missed approach

instructions, special notes/procedures, and the

assigned runway location/proximity to adjacent

runways. Pilots will be advised that simultaneous

ILS/MLS or simultaneous close parallel ILS PRM

approaches are in use. This information may be

provided through the ATIS.

c.

The close proximity of adjacent aircraft

conducting simultaneous parallel ILS/MLS and

simultaneous close parallel ILS PRM approaches

mandates strict pilot compliance with all ATC

clearances. ATC assigned airspeeds, altitudes, and

headings must be complied with in a timely manner.

Autopilot coupled ILS/MLS approaches require pilot

knowledge of procedures necessary to comply with

ATC instructions. Simultaneous parallel ILS/MLS

and simultaneous close parallel ILS PRM approaches

necessitate precise localizer tracking to minimize

final monitor controller intervention, and unwanted

No Transgression Zone (NTZ) penetration. In the

unlikely event of a breakout, ATC will not assign

altitudes lower than the minimum vectoring altitude.

Pilots should notify ATC immediately if there is a

degradation of aircraft or navigation systems.

d.

Strict radio discipline is mandatory during

parallel ILS/MLS approach operations. This includes

an alert listening watch and the avoidance of lengthy,

unnecessary radio transmissions. Attention must be

given to proper call sign usage to prevent the

inadvertent execution of clearances intended for

another aircraft. Use of abbreviated call signs must be

avoided to preclude confusion of aircraft with similar

sounding call signs. Pilots must be alert to unusually

long periods of silence or any unusual background

sounds in their radio receiver.

 

A stuck microphone

may block the issuance of ATC instructions by the

final monitor controller during simultaneous parallel

ILS/MLS and simultaneous close parallel ILS PRM

approaches.

REFERENCE

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AIM, Chapter 4, Section 2, Radio Communications Phraseology and
Techniques, gives additional communications information.

e.

Use of Traffic Collision Avoidance Systems

(TCAS) provides an additional element of safety to

parallel approach operations. Pilots should follow

recommended TCAS operating procedures presented

in approved flight manuals, original equipment

manufacturer recommendations, professional

newsletters, and FAA publications.