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AIM

10/12/17

5−4−38

Arrival Procedures

a. ATC procedures permit ILS/RNAV/GLS

instrument approach operations to dual or triple

parallel runway configurations. ILS/RNAV/GLS

approaches to parallel runways are grouped into three

classes: Simultaneous Dependent Approaches; Sim-

ultaneous Independent Approaches; and

Simultaneous Close Parallel PRM Approaches.

RNAV approach procedures that are approved for

simultaneous operations require GPS as the sensor

for position updating. VOR/DME, DME/DME and

IRU RNAV updating is not authorized.

  The

classification of a parallel runway approach

procedure is dependent on adjacent parallel runway

centerline separation, ATC procedures, and airport

ATC final approach radar monitoring and commu-

nications capabilities. At some airports, one or more

approach courses may be offset up to 3 degrees. ILS

approaches with offset localizer configurations result

in loss of Category II/III capabilities and an increase

in decision altitude/height (50’).

b. Depending on weather conditions, traffic

volume, and the specific combination of runways

being utilized for arrival operations, a runway may be

used for different types of simultaneous operations,

including closely spaced dependent or independent

approaches. Pilots should ensure that they understand

the type of operation that is being conducted, and ask

ATC for clarification if necessary.

c. Parallel approach operations demand height-

ened 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, glideslope/glidepath inter-

cept altitude, glideslope crossing altitude at the final

approach fix, decision height, missed approach

instructions, special notes/procedures, and the

assigned runway location/proximity to adjacent

runways. Pilots are informed by ATC or through the

ATIS that simultaneous approaches are in use.

d. The close proximity of adjacent aircraft

conducting simultaneous independent approaches,

especially simultaneous close parallel PRM ap-

proaches mandates strict pilot compliance with all

ATC clearances. ATC assigned airspeeds, altitudes,

and headings must be complied with in a timely

manner. Autopilot coupled approaches require pilot

knowledge of procedures necessary to comply with

ATC instructions. Simultaneous independent ap-

proaches, particularly simultaneous close parallel

PRM approaches necessitate precise approach course

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.

e. Strict radio discipline is mandatory during

simultaneous independent and simultaneous close

parallel PRM 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 on the

tower frequency by the final monitor controller

during simultaneous independent and simultaneous

close parallel PRM approaches. In the case of PRM

approaches, the use of a second frequency by the

monitor controller mitigates the “stuck mike” or other

blockage on the tower frequency.

REFERENCE−

AIM, Chapter 4, Section 2, Radio Communications Phraseology and

Techniques, gives additional communications information.

f. 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 news-

letters, and FAA publications.

3/15/07

7110.65R CHG 2

AIM

3/29/18