AS350 headset requirements

[Saemarke]

A headset is required to operate the Astar due to the audible warnings and gong but is there a manufacturer requirement to have a spare headset? If yes where in the RFM can I find it and does it have to be accessible to the pilot while in flight? I've been searching the RFM but have been unsuccessful as of yet. Thank you.
**Update**
In the B3E RFM I can find the limitation but not in the B3 RFM. Can anyone shed light on that?

[Flying Bull]

I don’t have the 350 RFM manual at hand, but I recall, that for the EC155 it was necessary to have a spare headset at pilots reach, if operated single pilot
It has to be in section 2, Limitations
havenˋt found the requirement in the H145 manuel so.

[JimEli]

A headset is required to operate the Astar due to the audible warnings and gong but is there a manufacturer requirement to have a spare headset? If yes where in the RFM can I find it and does it have to be accessible to the pilot while in flight? I've been searching the RFM but have been unsuccessful as of yet. Thank you.
**Update**
In the B3E RFM I can find the limitation but not in the B3 RFM. Can anyone shed light on that?

Unless you're looking at a very old B3 RFM, it should be located at 2.5.5. Versions of the B3-2B RFM did not contain the limitation.

"A minimum of two adequate radio/audio headsets shall be on-board the helicopter, one worn by the pilot at the controls to monitor the audio warnings delivered through the ICS system, and a spare one."

[ApolloHeli]

Here's section 2.5.5. verbatim from the EASA Approved RFM for an AS350 B3 Arriel 2B1 (a.k.a. B3+ here in Switzerland).

"2.5.5 MANDATORY EQUIPMENT
A minimum of two adequate radio / audio headsets shall be on-board the helicopter, one worn by the pilot at the controls to monitor the audio warning delivered through the ICS system and a spare one."

I don't have a B3 RFM at hand right now but seeing as the audio warning system and ICS are the same as the B3+ I can imagine the minimum of two headsets would be as well.

[Saemarke]

My RFM Section 2 only goes to 2.2. I'll have to research this and seek any updates if they apply to this bird. Thank you all for your input.
Saemarke