Bulletins

ADxC-73-SB-021, Issue A4

Service bulletin  B23 Approved Publications (AFM, AMM, SB)

23.7.2024

B23 Approved Publications (AFM, AMM, SB)
Service Bulletin

All serial numbers of Bristell B23 TCDS EASA.A.642

B23 Approved Publications (AFM, AMM, SB)

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ADxC-73-SB-044, Issue A

Service bulletin for convenience or option

14.05.2024

Bristell B23 - Exhaust retrofit
Reduction of Exhaust back pressure

Applicable to all serial numbers of Bristell B23 and B23-912-G500 - TCDS EASA.A.642

Optional retrofit of exhaust system with higher diameter tubing (DC-110). ,
Optional retrofit of exhaust system and silencer with higher diameter tubing (DC-115) with
corresponding changes to the DC-110 exhaust system and front fuselage.
Subsequent furnishing of AFM and AMM supplements.
Version without silencer (DC-110) and with silencer (DC-115) both described in this bulletin.

ADxC-73-SB-037_B

Service bulletin
This SB could be made mandatory by an EASA AD

24.11.2023
/
22.03.2024

Electric system incl. drawings

All Bristell B23 aircraft

Correction of (potential) non-conformities and design rectifications
Rev.B: Compliance time added

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ADxC-DC-73-114

Service bulletin

01.02.2024

Fuel grade UL91 avoidance

All Bristell B23 TCDS EASA.A.642 with Rotax 912

Strong advice to avoid using fuel grade UL91 on Bristell B23 with Rotax 912.

ADxC-73-SB-041_A

Service bulletin
This SB could be made mandatory by an EASA AD

04.01.2024

Trim Indication Placards

All Bristell B23 and B23-915 aircraft

Check the Elevator Trim Position Indicator placard if in accordance with the AFM.

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ADxC-73-SB-039_A

Service bulletin
Service bulletin for convenience or option

23.11.2023

Elevator and tab deflections tolerance and gurney flap

All Bristell B23 aircraft

Update of documentation.
Optional improvement of low speed trim range

ADxC-73-SB-035_A

Service bulletin
Service bulletin recommended to be accomplished to prevent significant operational disruptions

17.07.2023

Avoid engine stress ROTAX 912

All Bristell B23 aircraft

Recommended power settings to avoid engine stress ROTAX 912

ADxC-73-SB-034

Service bulletin recommended to be accomplished to preventsignificant operational disruptions

31.05.2023

Propeller mounting inspection

All BRM Aero B23 models and serial numbers

Degrease contact area between propeller and engine

ADxC-73-SB-033

Service bulletin recommended to be accomplished to prevent significant operational disruptions

22.05.2023

Chafing-protection of seat bracket

All BRM Aero B23 models and serial numbers

Protection against chafing of the solid rivets heads on the main center spar and of the spar web from the seat brackets

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ADxC-73-SB-007_A1

Service bulletin

23.2.2023

Implementation of DC-023 CO sensor

All Bristell B23 aircraft

Installation of CO-sensor DC-023

ADxC-73-SB-024_B

Service bulletin

20.6.2023

Service Bulletin Software B23

All B23 aircraft, EASA TCDS.A.642

Software update by avionic system manufacturer

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ADxC-73-SB-032

This service bulletin is mandatory and must be applied immediately to all aircrafts concerned.

24.2.2023

Caliper piston seals replacement

All Bristell B23 aircraft

Caliper piston seals replacement

ADxC-73-SB-029

This SB is mandatory as per EASA AD

9.2.2023 Original issue

17.10.2023 Revision B
(Change Nr.: ADxC-73-DC-105)

Removal or Change of ballast attached to engine

Note: this service bulleting also replaces ADxC-73-SB-020.A

All Bristell B23 aircraft

Insufficient or loss of attachment bolt torque
can lead to excessive wear on attachment
bolt shaft and cracks of attachment lugs
due to resulting pounding vibration. This, if undetected over long period of time, could lead to partial loss of attachment.

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ADxC-73-SB-023

Service bulletin for convenience or option

10.1.2023

Installation of glare shield with handles

All Bristell B23 aircraft

DC-067 introduced the option of glare shield with handles in production. By this service bulletin, this option is made available for retrofit.

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ADxC-73-SB-024

Service bulletin recommended to be accomplished to introduce improvements

10.1.2023

Approved software / Software update

All Bristell B23 aircraft

This service bulletin informs operators and maintenance organizations with respect to the approved software versions for the B23 aircraft.

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ADxC-73-SB-020
CANCELLED

Service bulletin recommended to be accomplished to prevent significant operational disruptions

9.1.2023 Original issue

10.10.2023 Revision B
(ChangeNr.: ADxC-73-DC-105)

Inspection and change of ballast attached to engine

All Bristell B23 models with Rotax 912.

B23 airplanes with ballast at engine; design change ADxC -73-DC-005/-007. This change is optional and limited to B23 with Rotax 912 engine. It enables more loading flexibility within otherwise unchanged weight and balance envelope.

Revision B: This service bulletin is CANCELLED, ref. ADxC-73-SB-029 issue B

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ADxC-73-SB-018

Service bulletin recommended to be accomplished to prevent significant operational disruptions

14.10.2022

Aileron AP system improvement

All BRM Aero B23 models and serial numbers with installed auto pilot system.

Improvement of the bracket connection (also called “sleeve”) connecting the aileron AP push rod with the aileron control system.

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ADxC-73-SB-019

Service bulletin to introduce improvements

20.09.2022

Editorial change of the AFM

All serial numbers of Bristell B23 and Bristell B23-915 TCDS EASA.A.642

For model Bristell B23: Update cabin smoke procedure. Editorial endorsement of fuel type. Update of Carburettor heat use in normal procedures. List of supplements.

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AFM download available at: https://www.bristell.com/technical-documentation/

ADxC-73-SB-015

Service Bulletin for convenience or option

26.8.2022

Replacement of oil cooler DC-045

All BRM Aero B23 with 912 series engines installed

Increase of cooling capacity of the oil cooler for hot and high operation for ROTAX Engine Type 912 (Series).

Under very hot and high conditions with prolonged engine run on ground, as well as
prolonged climbs at low speeds, the oil cooler with greater surface ensures a more
comfortable margin to the oil temperature limit reducing stress and wear of the engine.

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ADxC-73-SB-014

Service Bulletin for convenience or option

21.4.2022

Replacement of fuel filler neck placard

B23 All aircraft

- Addition of fuel grade AVGAS UL91 to the corresponding section in the AFM

- Replacement of fuel filler neck placards according to ADxC-DC-73-046

- Replacement of AFM ADxC-73-001-AFM by latest revision B

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ADxC-73-SB-012_A

Service bulletin to introduce improvements

18.02.2022

Replacement of wheel pant brackets

All B23, B23-915 models

To improve the durability of the parts, the surface protection is changed from zink – plating to normal painting.

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ADxC-73-SB-004

Service Bulletin

24.2.2021

Implementation of optional water coolant heater

All Bristell B23 aircraft

Implementation of optional water coolant heater DEFA and subsequent 411423, corresponding extension cable furnishing of AFM and AMM supplements

ADxC-73-SB-008

Service Bulletin to introduce improvements

13.8.2021

AFM changes

B23
All aircraft

Changes of the AFM:
Increase of demonstrated cross wind performance 9kts →15kts
corrections of typos, correction of current warning trigger values,
minor wording, addition of GDU460 to the MMEL
AFM download: https://www.bristell.com/technical-documentation/

Download EN

ADxC-73-SB-044, Issue A

Service bulletin for convenience or option

14.05.2024

Bristell B23 - Exhaust retrofit.
Reduction of Exhaust back pressure

Applicable to all serial numbers of Bristell B23 and B23-912-G500 - TCDS EASA.A.642

Optional retrofit of exhaust system with higher diameter tubing (DC-110). ,
Optional retrofit of exhaust system and silencer with higher diameter tubing (DC-115) with
corresponding changes to the DC-110 exhaust system and front fuselage.
Subsequent furnishing of AFM and AMM supplements.
Version without silencer (DC-110) and with silencer (DC-115) both described in this bulletin.

Download EN

ADxC-73-SB-037_B

Service bulletin
This SB could be made mandatory by an EASA AD

24.11.2023
/
22.03.2024

Electric system incl. drawings

All Bristell B23 aircraft

Correction of (potential) non-conformities and design rectifications
Rev.B: Compliance time added

Download EN

ADxC-73-SB-041_A

Service bulletin
This SB could be made mandatory by an EASA AD

04.01.2024

Trim Indication Placards

All Bristell B23 and B23-915 aircraft

Check the Elevator Trim Position Indicator placard if in accordance with the AFM.

Download EN

ADxC-73-SB-039_A

Service bulletin
Service bulletin for convenience or option

23.11.2023

Elevator and tab deflections tolerance and gurney flap

All Bristell B23-915  aircraft

Update of documentation.
Optional improvement of low speed trim range

Download EN

ADxC-73-SB-036

Service bulletin
for convenience or option

27.06.2023
Issue A

Update tow winch system installation

All BRM Aero B23 models and serial numbers with

DC-025 (DC-003: B23-915 with tow winch system), or

DC-076 (DC-049/058: B23-915 G500 with tow winch system)

Optional update of the tow winch system

- Change of guillotine control handle surface to be knurled

- Retrofit of a tail skid to the tow winch system at rear fuselage

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ADxC-73-SB-034

Service bulletin recommended to be accomplished to preventsignificant operational disruptions

31.05.2023

Propeller mounting inspection

All BRM Aero B23 models and serial numbers

Degrease contact area between propeller and engine

ADxC-73-SB-033

Service bulletin recommended to be accomplished to prevent significant operational disruptions

22.05.2023

Chafing-protection of seat bracket

All BRM Aero B23 models and serial numbers

Protection against chafing of the solid rivets heads on the main center spar and of the spar web from the seat brackets

Download EN

ADxC-73-SB-024_B

Service bulletin

20.6.2023

Service Bulletin Software B23

All B23 aircraft, EASA TCDS.A.642

Service Bulletin: Approved Software

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ADxC-73-SB-025

Service bulletin

6.3.2023

Installation governor for ROTAX 915iS engines

All B23 models, equipped with ROTAX 915iSc3 A engines

Installation governor for ROTAX 915iS engines

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ADxC-73-SB-032

This service bulletin is mandatory and must be applied immediately to all aircrafts concerned.

24.2.2023

Caliper piston seals replacement

All Bristell B23 aircraft

Caliper piston seals replacement

Download EN

ADxC-73-SB-023

Service bulletin for convenience or option

10.1.2023

Installation of glare shield with handles

All Bristell B23 aircraft

DC-067 introduced the option of glare shield with handles in production. By this service bulletin, this option is made available for retrofit.

Download EN

ADxC-73-SB-024

Service bulletin recommended to be accomplished to introduce improvements

10.1.2023

Approved software / Software update

All Bristell B23 aircraft

This service bulletin informs operators and maintenance organizations with respect to the approved software versions for the B23 aircraft.

Download EN

ADxC-73-SB-018

Service bulletin recommended to be accomplished to prevent significant operational disruptions

14.10.2022

Aileron AP system improvement

All BRM Aero B23 models and serial numbers with installed auto pilot system.

Improvement of the bracket connection (also called “sleeve”) connecting the aileron AP push rod with the aileron control system.

Download EN

ADxC-73-SB-019

Service bulletin to introduce improvements

20.09.2022

Editorial change of the AFM

All serial numbers of Bristell B23 and Bristell B23-915 TCDS EASA.A.642

For model Bristell B23-915: Updated cabin smoke procedure. Minor corrections.

Download EN

AFM download available at: https://www.bristell.com/technical-documentation/

ADxC-73-SB-013

Service Bulletin for convenience or option

11.04.2022

Replacement of fuel filler neck placard

B23-915 All aircraft

- Addition of fuel grade AVGAS UL91 to the corresponding section in the AFM

- Replacement of fuel filler neck placards according to ADxC-DC-73-042

- Replacement of AFM ADxC-73-003-AFM by latest revision B

ADxC-73-SB-012_A

Service bulletin to introduce improvements

18.02.2022

Replacement of wheel pant brackets

All B23, B23-915 models

To improve the durability of the parts, the surface protection is changed from zink – plating to normal painting.

Download EN

ALL-SB-0-0-0-DE-0002-2024
The SB is applicable to GERMANY and other countries where the aircraft is operated under German registration.

Mandatory Service Bulletin

19.07.2024

Control surfaces deflection

All models listed in German Kennblatt 66253:
• LSA, LSA-915
• LSA-K,LSA-K-RG,LSA-K-915,LSA-K-RG-915

It was found that the deflections of the ailerons are not in the specified range.

Measurement/adjustment of control surfaces deflections.

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ALL-SA-5-0-0-ALL-0001-2024

SAFETY DIRECTIVE/ALERT
Závazný bulletin

08.02.2024 1st Issue
08.02.2024 1.vydání

ROTAX 912 IS Engine Attachment
Uchycení motoru Rotax 912 iS

All models equipped with Rotax 912 iS engine and the original one-piece engine mount.
Všechny modely vybavené motorem Rotax 912 iS a původním jednodílným motorovým ložem.

Engine attachment inspection, screw replacement.
Kontrola uchycení motoru, výměna šroubů.

22112 Rev. A

28.11.2022

Automatic Trim/GDU™ 4XX Reset

All Bristell experimental, ultralight, and Light-Sport Aircraft fitted G3X, G3X Touch, and G5 systems

In G3X, G3X Touch, and G5 systems with GSA 28 autopilot servos connected to trim actuators, an uncommanded automatic trim runaway may occur when the autopilot is first engaged.

Software update required

ALL-SA-0-0-0-ALL-0002-2021

Safety directive/Safety alert
Závazný bulletin

11.11.2021

Seat attachment
Uchycení sedačky

All UL and LSA models of BRISTELL

Všechny UL a LSA modely bristell

Seat attachment brackets replacement.
Výměna konzol uchycení sedačky.

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ALL-SA-0-0-0-0005-2020

Safety Alert
Závazný

11.5.2020

KAVLICO PRESSURE SENSORS
SNÍMAČE TLAKU KAVLICO

All BRISTELL aircraft fitted with Kavlico pressure sensors.
Všechny letouny BRISTELL se snímači tlaku Kavlico.

Potential leak of Kavlico pressure sensors
Možný únik snímačů tlaku Kavlico

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ALL-SA-0-0-0-0001-2020

Safety Alert Directive

7.8.2020
(4.9.2020 Rev.1)
(7.12.2022 Rev.2)

AOI revision

All BRISTELL BRISTELL aircraft.

Change of crew arm for aeroplane C.G. calculation.

(Rev.1 – Re-classification to Safety Directive on FAA request)
Rev.2: MAC origin distance correction

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ALL-SA-0-0-0-0001-2020

Závazný

20.8.2020
Rev.1 nepoužita
(7.12.2022 Rev.2)

Revize LP

Všechny letouny BRISTELL.

Změna ramene posádky pro výpočet polohy těžiště letounu.

Revize 1 nepoužita

Revize 2: Oprava vzdálenosti počátku hloubky střední aerodynamické tětivy

Stáhnout CZ

ALL-SA-3-0-5-0001-2017
ALL-SA-4-0-5-0001-2017
ALL-SA-5-0-5-0001-2017

Safety Alert
Závazný

5.10.2017

ELEVATOR CONTROL STUCK
ZABLOKOVÁNÍ PODÉLNÉHO ŘÍZENÍ

All BRISTELL aircraft fitted with Rotax 912 iS, iS Sport, Rotax 914 engines and an autopilot.
Všechny letouny BRISTELL s motory Rotax 912 iS, iS Sport, Rotax 914 a autopilotem.

Elevator servo rod check
Kontrola táhla serva výškovky

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