## Britten-Norman 

# SERVICE BULLETIN

Britten-Norman Ai rc raft Limited Commodore House, Mountbatten Business Centre , Millb r ook Road East, Sout ha mpton , S0 15 1 HY United Kingdom

Models Affected Service Bulletin number 

## SB 334 All BN2, BN2A and BN2B (piston engine) Isla nd er series aircraft and BN2A Issue 2-17/07/2015 Mklll Trislander series aircraft. 

## IN SPECTION OF ENGINE CONTROL CABLE SLIDING END ASSEMBLIES This is a hig h ly recommended safety related Service Bulletin. 

### 1 COMPLIANCE STATEMENT Compliance is required within 6 months of the i ssue of this Service Bulletin. 

### 2 IN TRODUCT I ON Britte n-Norm an Aircraft Limited has been made aware of two examples wh ere a failure of engine control cable asse mb lies has caused eng i ne control issues . Affected pa rt numbers are: 137835 , 172449-1, 172450 and 172451 for Islander and 80468 and NB-45-2883 for Trislander. T h is Service Bulletin is a one-off inspection of the engine control cable sliding end assemblies to ensure appropriate general condit ions (Ref: MM/ 1 Chap 5.3 or MM/2 Chap 5.3 ) . The engine control cable assemb li es controlling the throttle , mixture control and propeller con stant speed control u nit (CSU) , i nclude a cable and a sliding end assembly. T he sliding end assembly is screwed to an end-fitting w h ich connects to the relevant control lever of the engine or CSU . In both reported failure occurrences the cable sliding end assemblies were in poor cond i tion and in bot h 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 inclu de Trislander slidi ng end ass em bly part number .

Fig. 1 Cable Sliding End Assembly - Failed Condition (Note the incorrect end-fitting used) 17 1 071 2015 

### Issue 2 SB334 Page 1 of 5

### Servi c e Bullet i n 3 APP LI CABI LI TY This Service Bulletin is applicable to all Islander BN2/BN2A, B N 28 and Trislan d er B N2A Mkll l (piston e ng i ne) seri es ai r c raft. 

### 4 WE I G HT a n d BA LA N CE None . 

### 5 EFFECT O N PUBLICAT I O N S No eff ect on publicatio ns . 

### 6 ACT I ON The following actions are to be applied to the throttle , mixture and CSU con t rol cable end-assemblies; WARNING : It is esse n tial that only the co rr ect B-N ap pro ved parts are used I n thi s assembly. The use of Incorrect or u n approved p a rts may subject the c om ponent to loads f or which it was not d esigned, which could result in a fail u r e of th e ca bl e s li ding en d assemb l y. Note : Ensure that the component and su rrounding assemblies ar e cleaned before in sp ection. Carry out the redefined maintenance procedure action as follows: 1) Check that the cabl e e nd -fitting install ed is the co rrect type (see Fig 2). 2) Ch eck that t h e cable sli ding end assembly sh ow s no si gn of phys ical dam age . 3) Check th at the cab le s l id i ng end assem bly has no signs o f cra c ki n g o r distortio n . 4) Check t hat the cadmium p l ating i s intact with no signs of cracking or peeling (see Fig. 3). 5) Check that the sliding end assembly shows no sign of corros ion. 6 ) Chec k that the wi re locking is intact and that there is no sign of distortion o r dam age to the wire loc ki ng ho l es. 7) C h eck th at t h e threaded porti on of th e cabl e sl i d i ng end assem b ly is cl ea n a n d u nda maged. 8) Check that the contro l l inkage is adj usted in accordance w ith the instructions detailed in the relevan t installation instructions (MM/1 or MM/ 2 ) . 9) If, after inspection , there is any doubt as to the serviceable condition of the cabl e sliding end assembly , the assembly mu st be removed and rep laced with 

### a service able unit.

SB334 

### Page 2 of 5 17/07/2015 Issue 2

### lslander/Trislander Sliding End Assembly Refer to Table 1

Islande r 

### ' 0'& '10' Engine Ball-Joint Refer to Table 2 Trislander 

### '0' En gine Ball-Joint Refer to Table 2 

### Service Bulletin

lslander/Trislander Sliding End Assembly Refer to Table 1

Islander 

### ' 0 ' & '1 0' Engine Fork-End Refe r t o 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 1 37835 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 5Thrott le Con t rols Mixture Controls 

## csu Co n t r ol s

SB 334 

### Page 4 of 5 

### Service Bulletin Is l ande r B NI BN2AIBN28 Is l ander Trislander BN2AMklll 260 HP 

### ' 0 ' Eng i ne BN I BN2AIBN28 260 HP 

### ' 0' Engine 300 HP 

### '10' Engine Port/Stbd Port/Stbd Mod Port/St bd Port/Stbd Rear Pre-Mod 445 445

NB-47 -509 NA B103-10UNF or NB-47- 509 NB-4 7 - 509 3921 {C 103-

10UN F) NB-47 -509 B103- 1 0UNF B103 - 10UNF B103- 1 0UN F NB -47 - 509 o r 3921 or 39 2 1 o r3921 (C10 3- 1 0 UNF) (C103- 1 0U NF ) (C103 -1 0U NF) NB-47-515 NA B103- 10UNF NB -4 7 - 515 NB-4 7- 515 o r 3921 (C103-10UNF) 

### T

able 2- E ngine Contr ol Fork-E nd/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' e ngine (BN2/BN2A, BN2B Islander series aircraft on ly) 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 I s land er Series aircraft only) Part No. 172449-1 . ... . . ...... ........ . .. ... Throttle cable Sliding E n d Assembly. Part No. 172450.... ..... ............... ..... Mixture and CSU cable Sliding End Assemblies. For the 260 HP 

### '0' engine (BN2A Mklll T risl ander Series aircraft only) Part No . NB-45-2883........ .... .......... Wing mounted Engine Mixture S l iding End Assemblies. Part No. 80468 . ..... ..- .. .. .... . ....... ..... 0ther Sliding End Assemblies . The necessary parts to comp l y with this Service Bulletin can be obtained from Customer Services Departm ent , 8-N Grou p Ltd, Bem bridge , Isle of Wight, P035 SPR, United Kingdom . 

### 9 FOLLOW ON ACTION Once this Service Bull etin 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.21 J. 138 . 

# l !L1

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**~** V1 Signed ....... ......... . 

# J~

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17/07/2015 Issue 2 SB334 

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