PU MS-61B “Lira”

PU MS-61B “Lira” control panel

PU MS-61B “Lira” is an aircraft control panel designed for remote control and status indication of the MS-61B onboard magnetic recorder. The panel is used as part of an aircraft voice and audio recording system and provides the flight crew with access to recorder control functions from the cockpit. It is not a standalone recording device; it operates together with the MS-61B recording unit and related aircraft wiring.

Control of MS-61B recorder through PU MS-61B

The PU MS-61B control panel enables crew interaction with the onboard recorder during aircraft operation. Through the panel, the crew can select operating modes, control recording activation and monitor recorder status indication. The recording unit itself is installed separately, while the control panel remains accessible to the flight crew on the instrument panel or in the cockpit equipment area.

PU MS-61B in the onboard recording system

The PU MS-61B works as an interface unit between the crew and the MS-61B onboard magnetic recorder. The recorder system is used for cockpit voice and audio signal recording, including speech signals and information received from onboard communication circuits. The complete system may include the recording unit in an armored enclosure, the control panel and connecting cables, depending on aircraft configuration and supply documentation.

MS-61B recording system operation

The associated MS-61B recorder system uses a steel wire recording medium and is designed for continuous recording of speech signals and time information. The system receives audio signals from microphone, radio and aircraft intercom sources and records them for later playback, analysis or investigation. The control panel supports operational control, while the recording unit performs the actual recording process.

Installation of PU MS-61B “Lira”

The PU MS-61B control panel is installed on the flight crew instrument panel or in the cockpit control area, according to the aircraft installation documentation. The panel is intended for remote control of the recorder, while the main recording unit may be installed in a protected location or equipment compartment. Correct operation depends on the condition of the control panel, recorder unit, connecting cables, power supply and aircraft communication circuits.

Identification and ordering of PU MS-61B

The product may be referenced as PU MS-61B, ПУ МС-61Б, MS-61-PU or PU MS-61B “Lira”. These names refer to the control panel used with the MS-61B onboard recorder. For correct supply, it is useful to specify whether the request concerns the control panel only or the complete MS-61B recorder system with recording unit, armored enclosure, cables and documentation.

Product Type: Aircraft recorder control panel
Designation: PU MS-61B “Lira”
Alternative Designations: PU MS-61B, ПУ МС-61Б, MS-61-PU
Function: Remote control and status indication of the MS-61B onboard magnetic recorder
Purpose: Crew interface for control of onboard voice and audio recording system
Application / Where Used: Aircraft onboard voice recording systems
Associated System: MS-61B onboard magnetic recorder
System / Installation Area: Onboard communication and recording system
Installation Location: Flight crew instrument panel / cockpit control area
Part of System / Included in Set: Recording unit in armored enclosure; control panel; connecting cables
Recorder Function: Recording of speech signals and time information
Recording Medium: Steel wire, type 5.4 per GOST 18834-83
Recording Medium Diameter: 0.05 mm
Continuous Recording Duration: Not less than 5.5 h
Linear Speed: 145 to 195 mm/s
Frequency Range: 300 to 3000 Hz
Dynamic Range: Not less than 30 dB
Input Signal Level, Microphone: 0.15 to 3 V
Input Signal Level, Radio / Intercom: 5 to 120 V
Operating Voltage: 27 V DC ±10%
Power Consumption: Not more than 20 W
Remote Control Distance: Up to 60 m
Operating Temperature Range: −60 °C to +50 °C
System Weight: 4 kg
Condition: As applicable
Technical Documentation: Passport MS-61B

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Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.