# ·~ **~[~f opter**  MBB BK117 C-2 

# ALERT SERVICE BULLETIN Fire Protection System - Fire Extinguishing System - Retrofit of improved clamps for the injection tubes 1. Planning Information A. Effectivity (1) Helicopters affected : (2) Components affected : (3) Spare parts affected: 

### B. Concurrent Requirements Not applicable . 

### C. Reason All MBB BK117C-2, S/N 9004 up to and including S/N 9104, furthermore S/N 9106, 9107 and 9111 , equipped with fire extinguishing system B262K1 002-801, B262K1 003-801 and B262K1 004-801 . Clamp NAS1922-0100-3 , Clamp TORRO 16-27/ 9C7W5 . Not applicable.

During an inadvertent operation of the fire extinguishing system, in one case it occurred that one connection of two injection tubes became disconnected. For this reason, all respective clamps must be rep laced with an improved version . 

### D. Description Replace clamps of the injection tubes . 

### E. Compliance This Alert Service Bulletin must be accomplished at the next 100 fh inspection, but by 31 .12. 2007 at the latest. 

### F. Approval The technical content of this document is approved under the authority of DOA No . EASA.21 J.034 

### G. Manpower Approx. 3 ,5 man- hours. 

### H. Weight and Balance Not applicable . 

### 2007-01-22 MBB BK117 C-2-26A-001 PAGE 1 of 4

# ~ld[~2opter MBB B K117 C-2 

# ALERT SERVICE BUL LETIN I. El ectrical Load Data Not appl icable . J . Software Accomplishment Summary Not applicable. K. References AMM MBB BK117 C-2 . L. Other Publications affected AMM MBB BK117 C-2 and IPC MBB BK117 C-2. M. Interchangeability of Parts Not applicable . 

### 2. Material Information A. Material - Price and Availability Information on cost and availability of required retrofit kit SB - 117C2-26A-001-2C will be provided by ECD , Dept. Spares Order Administration on request. B. Support Information Not applicab le . C. Material Necessary for Each Helicopter Retrofit kit SB-117C2-26A-001-2C. No. New P/N Keywo rd

1 GBSM24/18W4SK GBSclamp



## - Clam p 2 

## - Safety lacquer (CM680) * a.n . = as needed Dis pos iti on: A = New, included in kit. O ld P/N Qty Disposition



## - 3 A N

A

S1 922-01 00-3 3 

# c or TOR R 01 6-27/ 9C7 W5

- a.n.* B

B = Consumab le material , to be ordered from the lnterturbine company as needed. CM item number i .a.w. list of consumable materials in the AMM. C = Part with old P/N is d iscarded Discarded parts are not taken back by ECD . 

### MBB BK117 C-2-26A-001 PAGE 2 of 

### 4 2007-01-22

# ·~ **~[~ fopter**  MBB BK117 C-2 

# ALERT SERVICE BULLETIN D. Material Necessary for Each Spare Not applicabl e. 

### E. Reidentified Parts Not applicable. 

### F. Special Tooling Not applicable . 

### 3. Accomplishment Instructions A. Replace clamps : (1) If necessary, remove injection tubes i.a.w. AMM , 26-21-01 , 4-3 . Discard removed clamps (1 , Figure 1). {2} Re-install injection tubes with new clamps (1, Figure 1) contained in retrofit kit i.a.w. AMM , 26-21 -01 , 4-3. Reposition injection tubes and clamps for proper bead alignment i.a .w. detail A, figure 1 . Torque-tighten screws of new clamps (1) to 8 Nm . (3) Apply safety lacquer (CM 680) onto screws of clamps (1 , Figure 1 ) . B. Confirm accomplishment of this Alert Service Bulletin by an entry i n the historica l record of the helicopter. 

### 4. Appendix Not applicable .



### 2007-01 -22 MBB BK117 C-2-26A-001 PAGE 3 of 4

# ·~~~~**~opter** MBB BK117 C-2 

# ALERT SERVICE BULLETIN

1 GBS clamp Clamp



### MBB BK117 C-2-26A-001 PAGE 4 of 

### 4 

# ffi Before retrofit. 

# & After retrofit. 

# & Apply safety lacquer (CM 680) onto screw. 

# .& Ensure bead alignment.

GBSM24/18W4SK 

## ill NA$1922-0100-3 

### & TORR016-27/9C7W5 

### & 

# & DetaiiA



### A

FLIGHT DIRECTION

# ~

Replacement of Injection Tube Clamps Figure 1 

### 8 Nm

2007-01-22