January 31/12 (Revision 1) Service Bulletin No 

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# ALERT SERVICE BULLETIN Kidde Graviner Limited Mathisen Way Colnbrook, Slough, Berkshire, SL3 0HB, United Kingdom Telephone +44 (0) 1753 683245 Fax +44 (0) 1753 685040

HAND OPERATED FIRE EXTINGUI SHER - FAILURE TO OPERATE
1. Planning Information A. Effectivity
Aircraft affected: Various Unit affected: Hand Operated Fire Extinguisher Part Nos. 56412-001 (34H), 56411-001 (35H) and 56412-002 (38H)
B. Concurrent Requirements (1) None. C. Reason (1) An instance has occurred where an operator has tried to use the fire extinguisher, but the extinguisher has failed to operate when the lever has been pressed. D. Description (1) This Service Bulletin tells operators to remove the body and operating components, apply adhesive to the gland nut and re-install the body and operating components. E. Compliance (1) It is recommended that the content of this Service Bulletin be done in accordance with the requirements of the relevant aircraft OEM. Kidde Graviner recommends that only approved repair organisations do the procedure in this Service Bulle tin or alternatively the extinguisher is returned to Kidde Graviner. F. Approval (1) Kidde Graviner have technically approve d the content of this service bulletin.

G. Manpower (1) It will take an estimated 25 h ours to do this Service Bulletin. NOTE: It is assumed that the equipment has been put in a maintenance status. The man-hour estimates do not include time for preparat ion, close-out or adm inistrative functions. H. Weight and Balance (1) None. I. References (1) Aircraft Maintenance Manual. J. Other Publications Affected (1) Component Maintenance Manual 26-24-01.Aug 23/11 Service Bulletin No 

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# ALERT SERVICE BULLETIN Kidde Graviner Limited

2. Material Information
A. Material (1) These materials are necessary: (a) Fluid, Dow Corning DC200/10cS (b) Adhesive, Loctite 243 (c) Grease, Silicone DC4, B. Tooling (1) These special tools are necessary: (a) Adaptor 671-776 - to remove cap assembly. (b) Insertion/Removal Tool 34HR26 - to remove/install gland nut. 3. Accomplishment Instructions A. General (1) References in parentheses are to the Illustrated Parts List Figure/item No. in the Component Maintenance Manual 26-24-01.
B. Procedure WARNING : DAMAGE TO A PRESSURIZED CONTAINER CA N CAUSE DEATH OR SERIOUS INJURY. HANDLE CONTAINERS WITH CARE. DO NOT DROP, OR CAUSE DAMAGE TO, A CONTAINER. (1) Removal (a) Secure the container in a vice in a suitable protective clamp. WARNING :DURING THE PROCEDURE THAT FOLLOWS, TAKE CARE NOT TO KNOCK, DAMAGE OR PULL UP THE VALVE (1-130). ANY UNNECESSARY FORCE MAY BREAK THE FRANGIBLE PLUG IN THE SYPHON TUBE SUBASSEMBLY AND CAUSE THE EXTINGUISHANT TO FLOW THROUGH THE VALVE. RELEASE OF EXTINGUISHANT CAN CAUSE SER IOUS INJURY OR DEATH. (b) Remove the cap assembly (1-70) with the Cap Removal Tool 34R26. Discard the cap assembly (1-70) if the indicator disc has been pierced. (c) Remove the pivot pin (1-40) and remove the lever (1-60) and washers (1-50). (d) Use a forked screwdriver to remove the lever bolt (1-90). (e) If installed, remove the sealing cap (1-30). Remove the nozzle (1-10) and the nozzle washer (1-20). (f) Install the Adaptor 671-776 in the bore for the nozzle (1-10) and remove the body (1-80). (g) Remove the spring (1-120). (h) Remove the gland nut (1-110) with the Insertion/Removal Tool 34HR26. Remove and discard the gland packing (1-100). (i) Install a dummy body (1-80) temporarily onto the container (1-180) over the valve (1-130) to prevent damage to the valve and su bsequent release of extinguishant.January 31/12 (Revision 1) Service Bulletin No 

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# ALERT SERVICE BULLETIN Kidde Graviner Limited Mathisen Way Colnbrook, Slough, Berkshire, SL3 0HB, United Kingdom Telephone +44 (0) 1753 683245 Fax +44 (0) 1753 685040

(2) Assembly (a) Soak a new gland packing (1-100) in fluid, Dow Corning DC200/10cS for at least 30 minutes. Remove any excess fluid. (b) Use the Insertion/Removal Tool 34HR26 to install the gland packing (1-100) into the body (1-80). (c) Apply adhesive, Loctite 243, to cover the threads of the gland nut (1-110) and use the Insertion/Removal Tool 34HR26 to install the gland nut (1-110) into the body (1-80) one to two threads only. (d) Install the lever bolt (1-90) carefully into the body and through the gland packing and gland. (e) Use the Insertion/Removal Tool 34HR26 to fully install the gland nut (1-110) in the body. Turn the gland nut (1-110) fully out and then fully in to make sure that the threads are completely coated with adhesive. Tighten the gland nut (1-110 ) so that it is level with, or not more than 0.04 in (1,0 mm) above the shoulder of the bod y. Let the adhesive, Loctite 243, cure for 24 hours. (f) Install the spring (1-120). (g) Use a forked screwdriver to screw the lever bolt (1-90) into the valve two complete turns only. WARNING :DURING THE PROCEDURE THAT FOLLOWS, TAKE CARE NOT TO KNOCK, DAMAGE OR PULL UP THE VALVE (1-130). ANY UNNECESSARY FORCE MAY BREAK THE FRANGIBLE PLUG IN THE SYPHON TUBE SUBASSEMBLY AND CAUSE THE EXTINGUISHANT TO FLOW THROUGH THE VALVE. RELEASE OF EXTINGUISHANT CAN CAUSE SER IOUS INJURY OR DEATH. (h) Remove the dummy body (1-80) from the container (1-180). (i) Install the body (1-80) onto the syphon tube assembly. (j) Use the Adaptor 671-776 to tighten the body (1-80) to between 38 and 43 N m (28 and 32 lbf ft). (k) Install the sealing washer (1-20) and nozzle assembly (1-10). Tighten the nozzle assembly (1-10) to between 8,2 and 10,1 N m (6 and 7.5 lbf ft). (l) Install the lever (1-60) and spacing washers (1-50). Assemble the pivot pin (1-40) to the body (1-80) through the first washer (1-50), the lever (1-60) and second washer (1-50). Screw in the pivot pin (1-40) one to two turns only. Apply adhesive, Loctite 243, to the threads in the body (1-80) for the pivot pin (1-40). Turn the pivot pin (1-40) fully in, fully out and then fully in to make sure that the threads are completely coated with adhesive. Tighten the pivot pin (1-40) until it is level with the body (1-80). (m) Use a forked screwdriver to a turn the lever bolt (1-90) to give a free movement at the end of the lever (1-60) of approximately 0,76 mm (0.030 in). (n) Apply adhesive, Loctite 243, to the threads of a new cap assembly (1-70) and install hand tight. (o) Apply grease, Silicone DC4, to the inside surfaces of the se aling cap (1-30) and install the sealing cap over the nozzle (1-10). (p) Use a suitable indelible black marker pen and write the service bulletin number on the extinguisher head in the position shown: refer to Figure 1. (3) Complete the maintenance documentation.January 31/12 (Revision 1) Service Bulletin No 

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# ALERT SERVICE BULLETIN Kidde Graviner Limited

Figure 1 Identification WRITE THE SERVICE BULLETIN NUMBER HEREJanuary 31/12 (Revision 1) Service Bulletin No 

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# ALERT SERVICE BULLETIN Kidde Graviner Limited



### Service Bulletin Accomplishment Record

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Service Bulletin Accomplished by:

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Please Fax or email th is completed form to: Kidde Graviner Limited for the attention of Tony Carroll, Aircraft Support Manager Fax: +44 (0) 1753 685040 email: Tony.Carroll@hs.utc.com