BI-037E

Measurement-channel role of BI-037E

The BI-037E operates within the measurement channel of the radio altimeter. Its function is connected with forming, processing and transferring measurement signals inside the A-037 system. These signals are used by the radio altimeter to form height information for cockpit indication and related onboard circuits. The board does not transmit microwave energy, does not receive the reflected signal directly from the antenna, and does not display height to the crew. It works as an internal measuring-board element of the complete system.

BI-037E in A-037-1 receiver configurations

The BI-037E is compatible with A-037-1A, A-037-1V and A-037-1G receiver configurations, depending on system version and equipment documentation. These transceiver / receiver assemblies may differ by radio altimeter variant, indicator type and aircraft installation, but the BI-037E remains part of the internal measurement channel where specified. For repair or replacement, the board should be matched by exact designation, receiver configuration and A-037 documentation rather than by appearance alone.

Use of BI-037E in PP-5M receiver

In addition to the A-037 radio altimeter, the BI-037E is also associated with the PP-5M receiver. In this equipment, it is used as an internal electronic measuring board within the receiver-related signal path. Since PP-5M and A-037 equipment may use similar component families, the exact board position and applicability should be confirmed by the product passport and receiver documentation. This is especially important when the board is supplied separately from the complete unit.

Technical data status of BI-037E

According to the product passport, separate “Basic Technical Data” for the BI-037E measuring unit are not specified. Its electrical, functional and performance characteristics are defined at the level of the A-037 radio altimeter in which the board is installed. This is normal for an internal functional board. The unit is not tested or accepted as an independent radio device; its correct operation is verified as part of the complete radio altimeter equipment and its measurement channel.

Service life and warranty of BI-037E

The service life and storage life of the BI-037E correspond to those of the A-037 radio altimeter. Warranty operating time is specified as 2000 hours, and warranty storage period is specified as 2 years. These values should be understood in the context of the product passport and the complete radio altimeter documentation. For supply, it is important to confirm condition, storage history, documentation and whether the board has been tested as part of the relevant receiver or radio altimeter set.

Installation and supply notes for BI-037E

Structurally, the BI-037E is manufactured as an electronic measuring board installed inside radio altimeter equipment. During inspection, the board should be checked for connector condition, soldering quality, corrosion, contamination, damaged components, overheating marks and storage-related defects. Since it is an avionics board, handling should be done with proper antistatic precautions. For procurement, the full designation BI-037E should be used, with the required receiver configuration and A-037 system version clearly stated.