Honeywell International Inc. DMA-37B2 Manuale Utente

Page 2009

10 Oct 2007

DMA-37B DME System

© Honeywell International Inc. Do not copy without express permission of Honeywell.

(1) General

(a) After installation of the DMA-37B DME System and inspection of the equipment in 

accordance with Table 2002, perform a continuity and visual check of the system 

interwiring in accordance with Paragraph 3.B.(2). A post-installation test in 

accordance with Paragraph 3.B.(3) must then be performed.

(2) System Interwiring Check

(a) Visually check the system interwiring for abnormalities, such as cables rubbing 

unprotected metal edges or tightly stretched cables. Check continuity of all 

interwiring. In particular, check the following:
• Check that the DMA-37B is properly installed and the hold-down screw clamps 

are tight.

• Check the wiring harness connectors for security and connection to the 

DMA-37B.

• Check that the antenna transmission line connectors are securely fastened.
• Check that the control panel connectors are securely fastened.
• Check that the DME display is securely fastened.
• Check that the cables do not interfere with aircraft controls or other equipment.

(3) Post-lnstallation Check

(a) Test Equipment Required

1

Table 2003 lists a ramp test set that can be used to determine if the DMA-37B 

DME System is operating properly. Test sets other than that listed in Table 2003 

can be used if their characteristics fulfill those listed under Characteristics 

Required.

4 MCU Unit Mount

As defined by manufacturer's instructions.

DMA-37B DME Interrogator

1.

Check that unit is fully inserted in mount and that 

Interrogator the knurled screw clamps which secure the unit 

in the mount are tight and safety wired.

2.

Inspect the case for deformation, dents, corrosion, and 

damage to finish; make sure that ventilation holes in the unit 

are not clogged.

NAV Control Panel

As defined by manufacturer's instructions.

DME Display

As defined by manufacturer's instructions.

DME Antenna

As defined by manufacturer's instructions.

Transponder and DME 

Test Set

Must have an X-channel and a Y-channel output. 

Selected range must be variable from 0.1 to 400 

nautical miles. Must transmit an ident tone.

Instrument Flight Research 

Corp. (IFR) Model ATC-6OOA 

or equivalent