Britten-Norman 

SERVICE 

BULLETIN 

Britten-Norman Aircraft Limited 

Commodore House, Mountbatten Business Centre, Millbrook Road East, 

Southampton, S015 1 HY United Kingdom 

Models Affected Service Bulletin number 

SB 334 

All BN2, BN2A and BN2B (piston engine) Islander series aircraft and BN2A Issue 2-17/07/2015 

Mklll Trislander series aircraft. 

INSPECTION OF ENGINE CONTROL CABLE SLIDING END ASSEMBLIES 

This is a highly recommended safety related Service Bulletin. 

1 COMPLIANCE STATEMENT 

Compliance is required within 6 months of the i ssue of this Service Bulletin. 

2 INTRODUCTION 

Britten-Norman Aircraft Limited has been made aware of two examples where a failure of engine control 

cable assemblies has caused engine control issues. Affected part numbers are: 137835, 172449-1, 172450 

and 172451 for Islander and 80468 and NB-45-2883 for Trislander. 

This Service Bulletin is a one-off inspection of the engine control cable sliding end assemblies to ensure 

appropriate general conditions (Ref: MM/1 Chap 5.3 or MM/2 Chap 5.3). 

The engine control cable assemblies controlling the throttle, mixture control and propeller constant speed 

control unit (CSU), include a cable and a sliding end assembly. The sliding end assembly is screwed to an 

end-fitting which connects to the relevant control lever of the engine or CSU. 

In both reported failure occurrences the cable sliding end assemblies were in poor condition and in both 

occurrences an incorrect end-fitting was installed (see Fig. 1) which may have contributed to the failure. 

This SB has been updated to issue to include Trislander sliding end assembly part number. 

Fig. 1 Cable Sliding End Assembly - Failed Condition (Note the incorrect end-fitting used) 

1710712015 

Issue 2 

SB334 

Page 1 of 5 
Service Bulletin 

3 APPLICABILITY 

This Service Bulletin is applicable to all Islander BN2/BN2A, BN28 and Trislander BN2A Mklll (piston 

engine) series aircraft. 

4 WEIGHT and BALANCE 

None. 

5 EFFECT ON PUBLICATIONS 

No effect on publications. 

6 ACTION 

The following actions are to be applied to the throttle, mixture and CSU control cable end-assemblies; 

WARNING: 

It is essential that only the correct B-N approved parts are used In this assembly. The use of 

Incorrect or unapproved parts may subject the component to loads for which it was not designed, 

which could result in a failure of the cable sliding end assembly. 

Note: Ensure that the component and surrounding assemblies are cleaned before inspection. 

Carry out the redefined maintenance procedure action as follows: 

1) Check that the cable end-fitting installed is the correct type (see Fig 2). 

2) Check that the cable sliding end assembly shows no sign of physical damage. 

3) Check that the cable sliding end assembly has no signs of cracking or distortion. 

4) Check that the cadmium plating is intact with no signs of cracking or peeling (see Fig. 3). 

5) Check that the sliding end assembly shows no sign of corrosion. 

6) Check that the wire locking is intact and that there is no sign of distortion or damage to the wire locking 

holes. 

7) Check that the threaded portion of the cable sliding end assembly is clean and undamaged. 

8) Check that the control linkage is adjusted in accordance with the instructions detailed in the relevant 

installation instructions (MM/1 or MM/2). 

9) If, after inspection, there is any doubt as to the serviceable condition of the cable sliding end assembly, 

the assembly must be removed and replaced with a serviceable unit. 

SB334 

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17/07/2015 

Issue 2 
lslander/Trislander 

Sliding End Assembly 

Refer to Table 1 

Islander '0'& '10' Engine 

Ball-Joint 

Refer to Table 2 

Trislander '0' Engine 

Ball-Joint 

Refer to Table 2 

Service Bulletin 

lslander/Trislander 

Sliding End Assembly 

Refer to Table 1 

Islander '0 '& '10' Engine 

Fork-End 

Refer to Table 2 

Trislander '0' Engine 

Fork End 

Refer to Table 2 

Fig. 2 8-N Approved Control Cable End Assemblies 

Throttle 

Controls 

Mixture 

Controls 

csu 

Controls 

17107/2015 

Issue 2 

Islander BNIBN2AIBN2B Islander BNIBN2A/BN2B Trislander BN2AMklll 

260 HP '0' Engine 300 HP '10' Engine 260 HP '0' Engine 

Port/Stbd Port/Stbd Port/Stbd Port/Stbd Rear 

Pre-Mod 445 Mod445 

137835 NA 172450 80468 80468 

137835 172451 172450 NB-45-2883 80468 

137835 NA 172449-1 80468 80468 

Table 1 -Engine Control Sliding End Assembly Part Nos. 

58334 

Page 3 of 5 
Throttle 

Controls 

Mixture 

Controls 

csu 

Controls 

SB 334 

Page 4 of 5 

Service Bulletin 

Islander BNIBN2AIBN28 Islander Trislander BN2AMklll 

260 HP '0 ' Engine BNIBN2AIBN28 260 HP '0' Engine 

300 HP '10' Engine 

Port/Stbd Port/Stbd Mod Port/Stbd Port/Stbd Rear 

Pre-Mod 445 445 

NB-47-509 NA B103-10UNF or NB-47-509 NB-47-509 

3921 {C103-

10UNF) 

NB-47-509 B103-10UNF B103-10UNF B103-10UNF NB-47-509 

or 3921 or 3921 or3921 

(C103-10UNF) (C103-10UNF) (C103-1 0UNF) 

NB-47-515 NA B103-10UNF NB-47-515 NB-47-515 

or 3921 

(C103-10UNF) 

Table 2- Engine Control Fork-End/Ball Joint Part Nos. 

Fig. 3 Cable Sliding End- As New Condition 

17/07/2015 

Issue 2 
Service Bulletin 

7 MANPOWER 

0.5 man/hours. 

8 PROVISIONING 

The parts affected by this Service Bulletin are detailed as follows: 

For the 260 HP '0' engine (BN2/BN2A, BN2B Islander series aircraft only) 

Part No. 137835 ............................. Throttle, Mixture and CSU cable Sliding End Assembly. 

Part No. 172451 ............................. Mixture cable Sliding Screwed End Assembly (NB-M-445). 

For the 300 SHP '10' engine (BN2A/BN2B Islander Series aircraft only) 

Part No. 172449-1 .......................... Throttle cable Sliding End Assembly. 

Part No. 172450 ............................. Mixture and CSU cable Sliding End Assemblies. 

For the 260 HP '0' engine (BN2A Mklll Trislander Series aircraft only) 

Part No. NB-45-2883 ...................... Wing mounted Engine Mixture Sliding End Assemblies. 

Part No. 80468 ........ - ..................... 0ther Sliding End Assemblies. 

The necessary parts to comply with this Service Bulletin can be obtained from Customer Services 

Department, 8-N Group Ltd, Bembridge, Isle of Wight, P035 SPR, United Kingdom. 

9 FOLLOW ON ACTION 

Once this Service Bulletin has been actioned, no further action is required. 

10 APPROVAL 

The technical content of this document is approved under the authority of DOA nr EASA.21J.138. 

l !L1 //~ ~ V1 

Signed ................. J~·· ···· ······ ······ ··········· C"t .• ..- Date ....................... .!.1 ......... A~···· .)J)C>. ......................... . 

17/07/2015 

Issue 2 

SB334 

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