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HOLMCO N40 Series Recommended Operation Practices

Handset with support bracket
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RECOMMENDED OPERATION PRACTICES
N40 HANDSET with SUPPORT BRACKET
Note:
The following Recommended Operation Practices (ROP) summarize the results of observations
experienced during In-Service operation of the N40 handset with support bracket for several years.
This Recommended Operation Practices manual intends to give some advice to operational and
maintenance staff on how to handle handsets with support brackets for a safe operation, aiming to
improve their life cycle and reduce maintenance costs. Nevertheless damages cannot be avoided
completely herewith.
It shall not be partially or totally reproduced, lent to a third party or used against the aforementioned Company.
HOLMBERG GmbH &Co. KG
Ohlauer Strasse 5-11
10999 Berlin
Germany
CAGE Code: D9240
This document is property of Holmberg GmbH & Co.KG.
No:
Ho-P6091-ROP-0000
Rev: 04A
Date: Mar 11/2020
Page: 1 of 17

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Summary of Contents for HOLMCO N40 Series

  • Page 1 Ho-P6091-ROP-0000 HOLMBERG GmbH &Co. KG Rev: 04A Ohlauer Strasse 5-11 Date: Mar 11/2020 10999 Berlin Page: 1 of 17 Germany CAGE Code: D9240 RECOMMENDED OPERATION PRACTICES N40 HANDSET with SUPPORT BRACKET Note: The following Recommended Operation Practices (ROP) summarize the results of observations experienced during In-Service operation of the N40 handset with support bracket for several years.

  • Page 2: Record Of Revisions

    DATE DATE APR 28/2014 NOV 21/2018 21.11.2018 HOLMCO MAR 11/2020 11.03.2020 HOLMCO This document is the property of Holmberg GmbH & Co.KG. It shall not be partially or totally reproduced, lent to a third party or used against the aforementioned Company.

  • Page 3: List Of Abbreviations

    Date: Mar 11/2020 OPERATION PRACTICES Page: 3 of 17 N40 HANDSET with SUPPORT BRACKET LIST OF ABBREVIATIONS ....Component Maintenance Manual Fig....Figure HOLMCO ....Holmberg GmbH & Co.KG ....Part number ....Push to talk ....Quantity ....

  • Page 4: Table Of Contents

    Ho-P6091-ROP-0000 RECOMMENDED Rev: 04A Date: Mar 11/2020 OPERATION PRACTICES Page: 4 of 17 N40 HANDSET with SUPPORT BRACKET TABLE OF CONTENTS RECORD OF REVISIONS ............................2 LIST OF ABBREVIATIONS ............................3 TABLE OF CONTENTS .............................. 4 INTRODUCTION ............................... 5 DESCRIPTION AND OPERATION ........................6 HOW TO AVOID DAMAGE DUE TO IMPROPER HANDLING ...............

  • Page 5: Introduction

    Ho-P6091-ROP-0000 RECOMMENDED Rev: 04A Date: Mar 11/2020 OPERATION PRACTICES Page: 5 of 17 N40 HANDSET with SUPPORT BRACKET A. INTRODUCTION GENERAL Cockpit and cabin crews are requested to read this manual carefully to be able to use N40 handsets with support brackets in an adequate and proper way to avoid any unexpected damages.

  • Page 6: Description And Operation

    Ho-P6091-ROP-0000 RECOMMENDED Rev: 04A Date: Mar 11/2020 OPERATION PRACTICES Page: 6 of 17 N40 HANDSET with SUPPORT BRACKET B. DESCRIPTION AND OPERATION DESCRIPTION AND OPERATION OF THE HANDSET WITH SUPPORT BRACKET A. SUBASSEMBLIES The handset with support bracket consists out of three main assemblies: Handset Cable (Coiled cord) Support bracket.
  • Page 7 Ho-P6091-ROP-0000 RECOMMENDED Rev: 04A Date: Mar 11/2020 OPERATION PRACTICES Page: 7 of 17 N40 HANDSET with SUPPORT BRACKET B. HANDSET KEYPAD KEYS, N40 analogue series Figure 2: Handset Operation - N40 analogue series Key label Key description customized keyboard layout Function Keys 9 or 12 incl.
  • Page 8 Ho-P6091-ROP-0000 RECOMMENDED Rev: 04A Date: Mar 11/2020 OPERATION PRACTICES Page: 8 of 17 N40 HANDSET with SUPPORT BRACKET KEYPAD KEYS, N40 digital series Figure 3: Handset Operation - N40 digital serie Key label Key description multi-function (soft) keys numerical keys passenger address system PRIO priority call...
  • Page 9 Ho-P6091-ROP-0000 RECOMMENDED Rev: 04A Date: Mar 11/2020 OPERATION PRACTICES Page: 9 of 17 N40 HANDSET with SUPPORT BRACKET iii. RELEASE MECHANISM The handset is automatically held by a snap-in locking mechanism of the support bracket when it becomes hooked on. a.
  • Page 10 Ho-P6091-ROP-0000 RECOMMENDED Rev: 04A Date: Mar 11/2020 OPERATION PRACTICES Page: 10 of 17 N40 HANDSET with SUPPORT BRACKET To release the handset – press the Release Button, lift the handset up and move it away Release – Button “PRESS” from its support bracket Figure 5: Release handset To lock the handset, first place the lower side of the handset on the bracket (the locking nose of...
  • Page 11 Ho-P6091-ROP-0000 RECOMMENDED Rev: 04A Date: Mar 11/2020 OPERATION PRACTICES Page: 11 of 17 N40 HANDSET with SUPPORT BRACKET b. COCKPIT / FLIGHT DECK HANDSET The cockpit handset has a release mechanism, which allows to lock / unlock the handset on / from its support bracket.
  • Page 12 Ho-P6091-ROP-0000 RECOMMENDED Rev: 04A Date: Mar 11/2020 OPERATION PRACTICES Page: 12 of 17 N40 HANDSET with SUPPORT BRACKET COILED CORD (CABLE) The cable assures the electrical connection between Handset and its support bracket. To avoid any kind of damages of coiled cord, handset or support bracket, do not stretch the cable more than 2 meters.

  • Page 13: How To Avoid Damage Due To Improper Handling

    Ho-P6091-ROP-0000 RECOMMENDED Rev: 04A Date: Mar 11/2020 OPERATION PRACTICES Page: 13 of 17 N40 HANDSET with SUPPORT BRACKET C. HOW TO AVOID DAMAGE DUE TO IMPROPER HANDLING INTRODUCTION Please use the handset only for the intended use and advise your maintenance crew to check the handset if you detect these or similar damages to avoid equipment failures and operational interrupts (delays).
  • Page 14 Ho-P6091-ROP-0000 RECOMMENDED Rev: 04A Date: Mar 11/2020 OPERATION PRACTICES Page: 14 of 17 N40 HANDSET with SUPPORT BRACKET BROKEN BRACKET When the handset gets pressed too hard or not locked onto the bracket as shown in this ROP, the bracket may retain permanent damage. This can lead to the handset no longer being locked and results in falling down which can damage the unit or injures people.
  • Page 15 Ho-P6091-ROP-0000 RECOMMENDED Rev: 04A Date: Mar 11/2020 OPERATION PRACTICES Page: 15 of 17 N40 HANDSET with SUPPORT BRACKET DAMAGED BEND RELIEF When the cable gets overstretched or excessively kinked, the bend relief can retain permanent damage. This may result in a free play of the cable in the bend relief and damaging the SMD plug connector. DAMAGED RECEIVER CAPSULE When the handset gets pushed too hard onto the bracket, the housing of the handset &...
  • Page 16 Ho-P6091-ROP-0000 RECOMMENDED Rev: 04A Date: Mar 11/2020 OPERATION PRACTICES Page: 16 of 17 N40 HANDSET with SUPPORT BRACKET DAMAGED PROTECTIVE SIEVE The protective sieve is qualified to resist a force up to 300 N*. It usually resists a typical force of 400-500 N*.

  • Page 17: Equipment Cleaning Procedure

    Ho-P6091-ROP-0000 RECOMMENDED Rev: 04A Date: Mar 11/2020 OPERATION PRACTICES Page: 17 of 17 N40 HANDSET with SUPPORT BRACKET D. EQUIPMENT CLEANING PROCEDURE Please follow the cleaning instructions and obtain the warnings and notes below. WARNING: USE SOLVENTS/CLEANING AGENTS WITH A GOOD SUPPLY OF AIR. STRICTLY FOLLOW THE MANUFACTURERS INSTRUCTIONS AND SAFETY DATA SHEET! USE APPROVED PROTECTION WHEN YOU APPLY THE SOLVENTS/ CLEANING AGENTS.

This manual is also suitable for:

N40aN40b