MSA LH 050 Bedienungsanleitung

Maintenance manual

PP020210-01

MAINTENANCE

MANUAL

FLIGHT

HELMET

050

Maintenance manual

MSA, Châtillon sur Chalaronne • Tél. +33 (0)474 55 01 55 •

E-mail info.fr@MSAsafety.com

Table of Contents

Page

Table of Contents 1/22

- Warning notice 2/22

- Helmet description 3/22

- Warranty 3/22

- Introduction 4/22

1 – Chinstrap 5/22

2 – Inner liner elements 6/22

3 – Edge roll 7/22

4 – Inner visor 8/22

5 – Audio cable 9/22

6 – Microphone unit and cover (standard or winchman's) 10/22

7 – Mixed microphone boom 11/22

8 – Microphone boom 12/22

9 – Removing the complete microphone 13/22

10 – Earphones and hygiene parts of the ear cups 14/22

Servicing and maintenance table 15/22

Inspection table and replacement criteria 16/22

Appendices: Replacement criteria 17 to 22/22

Maintenance manual

MSA, Châtillon sur Chalaronne • Tél. +33 (0)474 55 01 55 •

E-mail info.fr@MSAsafety.com

WARNING NOTICE

Thank you for putting your trust in

MSA

products.

Read these instructions carefully before using your helmet.

Failure to follow these instructions could reduce the level of protection provided

by your helmet.

The level of protection provided by the helmet is only guaranteed if it has all the

original MSA parts. Therefore, any modifications made to your helmet or the absence of

any of the parts forming the original helmet will make the equipment supplied non-compliant,

releasing MSA from all liability.

In order to keep improving its products, MSA reserves the right to modify them

without prior notice.

To provide sufficient protection, this helmet must be fitted and adjusted to the head size

of its wearer.

The helmet is made in such a way that any energy received during an impact is absorbed

by the destruction of or partial damage to the shell and impact cap; even if this damage is not

immediately apparent, replacement of the whole helmet is recommended after a major

impact.

Users' attention is also drawn to the danger of modifying or removing any of the original

parts of the helmet except where the modification or removal is recommended by the helmet

manufacturer. Under no circumstances should helmets be adapted so that accessories can

be attached using a process not recommended by the helmet manufacturer.

Do not apply paints, solvents, adhesives or stickers, except those recommended by the

helmet manufacturer's instructions.

The MSA

LH 050 flight helmet is designed solely for helicopter pilots and helicopter

flight crew. It provides maximum comfort and protection.

It is available in three sizes, covering head circumferences from 52 cm to 64 cm. It

has an integrated visor and can be fitted with a wide range of communication systems,

on request. Contact us for more details.

Traceability is assured by a label showing a serial number.

After any obvious impact an inspection should be carried out by the maintenance

department or specialist workshop

Maintenance manual

MSA, Châtillon sur Chalaronne • Tél. +33 (0)474 55 01 55 •

E-mail info.fr@MSAsafety.com

FLIGHT HELMET LH 050

HELMET DESCRIPTION

Description:

•The shell of the helmet consists of:

-an outer shell made from high performance composites,

-an expanded polystyrene impact cap to absorb shocks, covered with an

inner liner.

•The inner liner consists of a T-shaped comfort liner and a neck pad.

The helmet is adapted to the shape of the wearer's head by personalising the

T-shaped comfort liner and the neck pad and the adjustment pads for adjusting the

pressure of the ear cups on the ears.

•The helmet has 1 inner protective visor.

•The ear protection system consists of:

-two ear cups, containing a housing for installing the earphones.

-two ergonomic comfort ear seals.

The ear cups provide excellent ear protection and are fixed inside the shell by means

of hook and loop pads.

•The helmet chinstrap is adjustable and fully removable.

•Every helmet is supplied with a protective bag and a personalisation kit.

•The helmet can accommodate a wide range of communication systems,

on request.

WARRANTY

All models, accessories and spares are subject to stringent checks before leaving

the factory.

MSA helmets and accessories are guaranteed for 12 months, parts and labour, from the

date of delivery to the buyer, against any failure during use under the conditions

described in this manual.

You also have a statutory warranty against hidden faults and defects subject to the

conditions laid down in Articles 1641 ff. of the French Civil Code.

Maintenance manual

MSA, Châtillon sur Chalaronne • Tél. +33 (0)474 55 01 55 •

E-mail info.fr@MSAsafety.com

INTRODUCTION

Important: whenever you are handling the helmet, make sure you put it down on its

carry bag.

Tools required:

- 7 mm flat spanner

- 2 mm hexagonal screwdriver

-Flat screwdriver

-Philips screwdriver

Maintenance manual

MSA, Châtillon sur Chalaronne • Tél. +33 (0)474 55 01 55 •

E-mail info.fr@MSAsafety.com

1. Chinstrap:

Tools: Philips screwdriver.

Dismantling duration: 15 seconds.

Mounting duration: 30 seconds.

The chinstrap is secured to the helmet by means of two screws on the left chinstrap

bracket.

To remove the chinstrap, unscrew the screws on the left side, then take out the

chinstrap levers by holding them by the ends.

To reinstall, engage each lever, making sure the chin cup is the right way round (the

return part of the strap should be uppermost) and so are the levers. Lock by pressing in

the middle of the lever. Tighten the 2 screws. You do not have to remove the chinstrap in

order to take off the chin cup.

Important: when reinstalling, the screws should be tightened 1/8 of a turn from when

the tightening stress increases (screwing into plastic).

Screws securing

the chinstrap

Maintenance manual

MSA, Châtillon sur Chalaronne • Tél. +33 (0)474 55 01 55 •

E-mail info.fr@MSAsafety.com

2. Inner liner elements:

Tools: None.

Dismantling duration: 20 seconds.

Mounting duration: 45 seconds.

There are three inner liner elements:

The comfort liner with its interchangeable foam pieces, each supplied in 3 thicknesses

(4, 8 and 12 mm thick),

The neck pad (XS, S and M or L, XL and XXL depending on the helmet size),

The ear cups and their adjustment pads (3 on each side + 2 extra on each side),

The comfort liner is adjustable in 4 areas with 3 possible thicknesses (N.B. When

replacing the foam pieces, check that they are seated correctly). The neck pad is also

supplied in 3 different thicknesses. The liner elements are fixed to the impact cap and

shell with hook and loop tape, so no tools are needed.

N.B. Be careful not to break the polystyrene core of the neck pad during removal or

reinstallation. The audio cables must run between the edge roll and the neck pad (see

audio cable section).

Maintenance manual

MSA, Châtillon sur Chalaronne • Tél. +33 (0)474 55 01 55 •

E-mail info.fr@MSAsafety.com

3. Edge roll

Tools: None.

Dismantling duration: 20 seconds.

Mounting duration: 45 seconds.

The edge roll is replaceable. It is attached to the rim by means of press studs

(3 on each side) and adjusts to fit the shell by means of two fastening pins. No tools are

needed for its removal and reinstallation.

When removing the edge roll, it is best to take out the ear cups and the neck pad first.

Then detach the 6 press studs and remove the 2 pins. When removing the first pin, it is

important to twist the edge roll then slide the pin along its slot. The second pin will then

come out easily on its own.

To reinstall the edge roll, engage the pins one after the other in the slots,

then fasten the press studs.

Maintenance manual

MSA, Châtillon sur Chalaronne • Tél. +33 (0)474 55 01 55 •

E-mail info.fr@MSAsafety.com

4. Inner visor:

Tools: None.

Removal time: 15 seconds.

Reinstallation time: 30 seconds.

The inner visor is attached to its rotation system by means of clips.

Move the visor to the lowered position. Important: the direction of removal

of the inner visor is perpendicular to the 2 rivets of the visor attachments.

To reinstall it, check that the control levers of the inner visor are in the

lowered position.

Engage the visor so that the clips will go into their housings correctly.

Clip in by pressing on the ends of the visor.

Removal:

Pull the visor at a right angle

to the 2 rivets

einstallation:

Insert the clips into their housings

and

push to clip the visor in place

Rotation system

lowered position

Maintenance manual

MSA, Châtillon sur Chalaronne • Tél. +33 (0)474 55 01 55 •

E-mail info.fr@MSAsafety.com

5. Audio cable:

Tools: Philips screwdriver.

Dismantling duration: 5 minutes.

Mounting duration: 5 minutes.

For this operation it is first necessary to remove the edge roll in order to access

the cable protection system.

- Remove the right ear cup,

- Remove the left ear cup,

- Remove the neck pad (make sure you do not break the piece of polystyrene inside

it),

- Put the ear cups inside the helmet,

- Remove the edge roll (see section 4),

- Unfasten the cable bushing from the connection circuit.

Unscrew the 2 screws of the cable protector and remove it

Carefully unplug the link cable to the Lz/Hz microphone switching box.

For reassembly, perform the same operations in reverse.

Warning: connect the JST plug on the link cable to the switching box on the circuit, in the

socket labelled "MIKE".

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