Britten-Norman 

SERVICE 

BULLETIN 

Britten-Norman Aircraft Limited 

Commodore House, Mountbatten Business Centre, Millbrook Road East, 

Southampton, S0151HY United Kingdom 

Models Affected Service Bulletin number 

SB 334 

All Islander BN2, BN2A and BN2B (piston engine) series Islander aircraft Issue 1 _ 3010812013 

and BN2A Mklll series Trislander 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 issue 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, 17250 

and 172451. 

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 MMI2 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 or 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. 

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

30108/2013 

Issue 1 

SB334 

Page 1 of 4 
Service Bulletin 

3 APPLICABILITY 

This Service Bulletin is applicable to all Islander BN2/BN2A, BN2B and BN2A Mklll (piston engine) series 

aircraft. 

4 WEIGHT and BALANCE 

None. 

5 EFFECT ON PUBLICATIONS 

No effect on publications. 

6 ACTION 

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

WARNING: 

It is essential that only the correct 8 -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. 

SB 334 

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30/08/2013 

Issue 1 
Sliding End Assembly 

Pt. No. 172451 or Pt. No.172499-1 & 

Pt. No. 172450 

(Mod NB-M-445) 

Ball Joint 

Pt. No. 8103-10UNF 

Mixture Contro 

(Mod NB-M-445) 

This is the only approved 

item for all engine control 

cables fitted to the 10 Engine 

Service Bulletin 

Sliding End Assembly 

8 -N Pt. No. 137835 or 

Pl. No. 172451 

(Pre-M od NB-M-445) 

Fork-End 

Pt. No. NB-47-509 

Mixture Control 

or 

Pt No. NB-47-515 

csu 

(Pre-Mod NB-M-445) 

Fig. 2 B-N Approved Control Cable End Assemblies (Pre and Post Mod NB-M-445) 

301081201 3 

Issue 1 

Fig. 3 Cable Sliding End- As New Condition 

SB 334 

Page 3 of 4 
Service Bulletin 

7 MANPOWER 

0.5 man/hours. 

8 PROVISIONING 

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

For the 260 SHP '0 ' engine 

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

Part No. 172451 Mixture cable Sliding Screwed End Assembly when MB-M-445 is 

embodied. 

For the 300 SHP '10' engine 

Part No. 172449-1 

Part No. 172450 

Throttle cable Sliding End Assembly 

Mixture and CSU cable 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 5PR, United Kingdom. 

9 FOLLOW ON ACTION 

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

10 APPROVAL 

s;goed .... jl_jtj!f;:~ ········ ············· oate ............... Jo/~ .. /.t1 ...................................................... . EASA Approval Number EASA.21J.138 

SB 334 

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Issue 1