## Britten-Norman 

# SERVICE BULLETIN
8-N Group Limited . BEMBRIDGE, Is le of Wight , United Kingd o m P035 5PR Models Affected Service Bulletin number 

### All Island er BN2 , BN2A and Trislander BN2A Ill BN2A 111- 1 

# 58 332 aircraft. Issue 1 - 06/12/2012 

# Fuel Filler Cap Sealing 1 Compliance Statement Implement this highly recom mended Service Bulletin at the earliest opportunity but within five (5) days of receipt of this Service Bulletin. 

## 2 Introduction Preliminary investigations into a recent engine failure have attributed it to water contaminated fuel. The contamination is suspected to have occurred due to inadequate sealing between a post-mod NB-M-477 fuel filler cap and a pre-mod NB-M-477 fuel filler receptacle. This Service Bulletin requires the operator to perform an inspection of the aircraft fuel replenishment points on the upper surface of the wings to ensure that both the quick release fuel filler cap and the fuel filler receptacle are at the same modification state. 

## 3 Applicability This Service Bulletin is applicable to all Islander BN2/BN2A and Trislander BN2A III/BN2A 

### 111-1 aircraft. 

## 4 Weight and Balance None. 

## 5 Effect on Publication s The Islander Aircraft Maintenance Manual (MM/1) will be amended to include an advisory Warning and an inspection procedure by normal revision action . The Trislander Aircraft Maintenance Manual (MM/2) will be amended to include an advisory Warning and an inspection procedure by normal revision action . Other publications including flight manuals are not affected by this bullet i n.



### 06/12/2012 

### Issue 1 SB 332 Page 1 of 5

### Service Bulletin


## 6 Action CAUTION Make the aircraft safe for maintenance. Place warni ng signs DO NOT CONNECT POWER SUPPLY and DO NOT START THE ENGINES. 2 Put a maintenance platform adjacent to the aircraft wings. 3 Examine the aircraft fuel replenishment points on the top surface of the wings, 4 Remove and examine each of the quick release fuel filler caps, ensure that the cap and the fuel filler receptacle are at the same modification state , Pre-mod NB-M-477 receptacle (Fig . 1) has a mai nly circular flange attached to the wing ski n . Post- mod NB-M-477 (Fig. 2) has a flange with a number of flat edges attached to the wi ng skin . 5 If the fue l fi lle r caps and the receptac les are at the same modification state , no further action is requ ired. To a id identification of fue l fill e r cap mod ification status , it shou ld be noted that Post-Mod N B-M-477 fuel filler caps are fitted with a qu ick-release key (see Fig. 2) whereas the Pre-Mod NB-M-477 fue l filler cap does not (see Fig. 1) . 6 If a mismatch of fuel filler cap and fuel filler receptacle is found , the correct quick release fue l . filler cap must be fitted as soon as possible. To mitigate the risk of water contamination prior to fitting the correct fuel filler cap, pre-flight water contamination checks of the gascolators and fuel tank sump drains (including wing tip tanks, if fitted) must be performed in addition to the normal dally checks specified by the Maintenance Schedule MS/1 (Section 2: Check 'A' Inspection). 7 Refer to Section 8 of this Service Bulletin for the Part Numbers of both the pre- mod NB-M477 qu ick re lease fuel filler cap and the post- mod NB-M-477 qu ick release fue l fi ll er cap and receptacle assembly. 8 On complet ion ofthe inspection , refit the correct quick release fuel filler caps . 9 Remove the maintenance platform and the warning signs . 10 Remove all tools, equipment and materials from the work area. Make sure the work area is clean. 11 Complete all documentation related to these actions.



### SB 332 06/12/2012 Page 2 of 5 Issue 1

### 06/1212012 Issue 1 Service Bulletin No Quick Release Key



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Fig 1 . Fuel Fi ller Cap Assembly Pre-Mod NB-M-477 

### $6332 Page 3 of 5

### 56332 Page 4 of 5Quick Release Key 

### Service Bulletin

Fuel Filler Cap

Fue l Filler Receptacle

' ' 

# ·· [)..... )

Fig. 2 Fuel Filler Cap Assembly Post-Mod NB-M-477 

### Bonding Peg



### 06/1 2/2012 Issue 1

### Service Bulletin 

### Terminating Action This Service Bulletin is completed only after the fuel filler caps and receptacles have been confirmed to be at the same modificati on state , Britten-Norman Ai rcraft Limited expect that both port and sta rb oard fuel filler caps and receptacles will be at the same mod ificati on standard which is reco rded in the ai rcraft log book . 

## 7 Manpower Th is Servi ce Bulleti n can be done by o n e person in less than 1 hour. 

## 8 Provisioning Fuel Filler C ap Part Numbers: Pre-Mod NB- M-477 King Air craft Filler cap and receptacle assembly 

### C.18563 Post-Mod NB-M-477 Shaw Aero Devi ces Fue l Fill er Cap 

### 416-1299 The necessa ry parts to install modification NB-M-477 can be obtained from Customer Servi ces Department , B- N Group Ltd , Bembridge , Isle of Wight , P035 5PR , Un ited Ki ngdom . 

## 9 Follow -on Action None . 

## 10 Approval

06/12/2012 Issue 1 

# .·**~;;? S~gned**  

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# 49..!~ . ..... .. EASA Approval 

### Number EASA.21J . 138



### SB 332 Page 5 of 5