Air carrier captain reported that during an ord ILS 10C prm approach; ord prm frequency was used ope...

Narrative:

During our ILS prm 10C ord approach while monitoring approach control and tower; the prm monitor frequency was being consistently used to control aircraft traffic on ord ground and airspace. I realized the voice was ord tower when we were switched to tower frequency. I advised both approach and tower of the simulcasting confusion by doing that. The condition continued. While in ord ops; I spoke with several pilots that had the same experience.the situation of monitoring two frequencies; while one is procedurally trained to be used for breakouts only; is not only confusing; it increases workload; leads to heavy conversation in the cockpit for coordination; and I expect to miss the potential breakout call from whoever is supposed to be monitoring our spacing between runway arrival lanes.

Original NASA ASRS Text

Title: Air carrier Captain reported that during an ORD ILS 10C PRM Approach; ORD PRM frequency was used operationally by TRACON; Tower; and Ground Control which potentially interferes with breakout commands. This caused confusion and increased pilot workload.

Narrative: During our ILS PRM 10C ORD approach while monitoring approach control and tower; the PRM Monitor frequency was being consistently used to control aircraft traffic on ORD ground and airspace. I realized the voice was ORD Tower when we were switched to tower frequency. I advised both approach and tower of the simulcasting confusion by doing that. The condition continued. While in ORD Ops; I spoke with several pilots that had the same experience.The situation of monitoring two frequencies; while one is procedurally trained to be used for breakouts only; is not only confusing; It increases workload; leads to heavy conversation in the cockpit for coordination; and I expect to miss the potential breakout call from whoever is supposed to be monitoring our spacing between runway arrival lanes.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1389822
Time
Date	201609
Local Time Of Day	1801-2400
Place
Locale Reference	ORD.Airport
State Reference	IL
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Make Model Name	Large Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Type 1048
Events
Anomaly	ATC Issue All Types Deviation - Procedural Published Material / Policy

Air carrier captain reported that during an ord ILS 10C prm approach; ord prm frequency was used operationally by TRACON; tower; and ground control which potentially interferes with breakout commands. This caused confusion and increased pilot workload.