T.F.S. No. 00000380 

Approved under EASA DOA No. 21J.056 Page 1/18 

2007.03.22

EUROCOPTER 

DIRECTION TECHNIQUE SUPPORT

13725 MARIGNANE CEDEX FRANCE

EMERGENCY

ALERT SERVICE BULLETIN 

SUPER PUMA NUMBER VERSIONS 

Civil: C, C1, L, L1, L2 332 76.00.04 Military: B, B1, F1, M, M1 

532 76.00.03 Military: AC, AL, SC, UC, UE, 

UL, A2, U2 

PUMA NUMBER VERSIONS 

Civil: F, G, J 

330 76.03 Military: Ba, C, Ca, Ea, H, Jm, 

S1, Sm 

SUBJECT: ENGINE CONTROLS

 Fuel Shut-Off Control Lever – Tangential Gearbox Jamming

REVISION No. DATE OF APPROVAL DATE OF ISSUE 

 

Revision 0 On: March 21, 2007 2007.03.21 

Revision 1 On: March 22, 2007 2007.03.22 
T.F.S. No. 00000380 

Approved under EASA DOA No. 21J.056 Page 2/18 

2007.03.22

1. PLANNING INFORMATION 

1.A. EFFECTIVITY 

1.A.1. Helicopters / Installed equipment 

Helicopters fitted with tangential gearboxes. 

1.A.2. Non-installed equipment 

Not applicable. 

1.B. ASSOCIATED REQUIREMENTS 

Not applicable. 

1.C. REASON 

To ensure that the fuel shut-off controls can be actuated, and to grease-lubricate the tangential 

gearboxes. 

The purpose of Revision 1 is to give a compliance time of 15 flying hours from receipt of Revision 0 of 

this ALERT SERVICE BULLETIN for helicopters that are 4 years old or older. 

Revision 1 of this ALERT SERVICE BULLETIN will form the subject of an EASA Airworthiness 

Directive. 

1.D. DESCRIPTION 

During a scheduled check (specified in the (PRE) Maintenance Program) of the fuel shut-off controls 

on two helicopters, one of the fuel shut-off controls was found to be jammed, which means that it 

would be impossible to actuate the general cut-off control. Both these helicopters are more than 20 

years old. 

The investigations have revealed that the jamming originates from the tangential gearboxes. In both 

cases, the grease in the left tangential gearbox had grown hard, and in one of these two cases, the 

right tangential gearbox showed traces of extensive corrosion. 

Jamming of the fuel shut-off control prevents: 

- the fuel cock at the engine inlet from closing and may thus stoke a fire, 

-the engine compartment ventilation flap from closing, which can reduce the efficiency of the 

extinguishing agent in the event of firing after fire alarm, 

- operation of the general cut-off control so that switching-off the electrical power system may become 

impossible in the event of an emergency landing. 

Consequently, EUROCOPTER renders compliance with this ALERT SERVICE BULLETIN mandatory 

in order to ensure that it is possible to actuate the fuel shut-off controls and to grease-lubricate the 

tangential gearboxes. 
T.F.S. No. 00000380 

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2007.03.22

1.E. COMPLIANCE 

EUROCOPTER renders compliance with this ALERT SERVICE BULLETIN mandatory. 

1.E.1. Compliance at the works 

 Not applicable.

1.E.2. Compliance in operation: By the operator: 

1.E.2.a. On helicopters / Installed equipment: 

For helicopters which are 4 years old or older: 

- Comply with paragraph 2.B.1. no later than within 15 flying hours following receipt of Revision 0 

of this ALERT SERVICE BULLETIN. 

. Interpretation of the results: 

- If there is no hard point in the fuel shut-off controls, comply with paragraph 2.B.1. at intervals 

not exceeding 50 flying hours pending compliance with paragraph 2.B.2. 

- If there is a hard point in one of the fuel shut-off controls, comply with paragraph 2.B.2. before 

resuming flights. 

- Comply with paragraph 2.B.2. no later than within 6 months following receipt of Revision 0 of this 

ALERT SERVICE BULLETIN. 

For helicopters which are less than 4 years old: 

- When the helicopter is 4 years old, comply with paragraph 2.B.1. 

. Interpretation of the results: 

. If there is no hard point in the fuel shut-off controls, comply with paragraph 2.B.1. at intervals 

not exceeding 50 flying hours pending compliance with paragraph 2.B.2. 

. If there is a hard point in one of the fuel shut-off controls, comply with paragraph 2.B.2. before 

resuming flights. 

- Comply with paragraph 2.B.2. at the latest when the helicopter reaches 4 and a half years. 

1.E.2.b. On non-installed equipment: 

 Not applicable. 

1.F. APPROVAL 

Approval is limited to civil version helicopters subject to an Airworthiness Certificate. 

The technical information contained in Revision 0 of this ALERT SERVICE BULLETIN was approved 

on March 21, 2007 under the authority of EASA Design Organisation Approval No. 21J.056. 
T.F.S. No. 00000380 

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2007.03.22

The technical information contained in Revision 1 of this ALERT SERVICE BULLETIN was approved 

on March 22, 2007 under the authority of EASA Design Organisation Approval No. 21J.056. 

1.G. MANPOWER 

Qualification: 1 mechanic to perform the check and the removal / installation work. 

 2 mechanics to adjust the friction. 

Time for the operations: Check: Approximately 15 minutes. 

 Grease-lubrication: Approximately 3 hours for the two tangential gearboxes. 

1.H. WEIGHT AND BALANCE 

Not applicable. 

1.I. EFFECT ON ELECTRICAL LOADS 

Not applicable. 

1.J. SOFTWARE MODIFICATION EMBODIMENT STATE 

Not applicable. 

1.K. REFERENCES 

- AS332 / AS532 helicopters except versions L2, A2 and U2 

Maintenance Manual (MET): Work Cards 76.20.00.501 - 76.20.00.601 

- AS332 L2 and AS532 A2 and U2 helicopters 

Aircraft Maintenance Manual (MMA): Tasks 76-20-00-211 - 76-20-00-821 

- SA330 helicopters 

Maintenance Manual (MDE): Work Cards 76.20.601 - 76.20.501 

- For all helicopters 

Standard Practices Manual (MTC): Work Cards 20.02.06.402 - 20.01.01.301 

1.L. OTHER DOCUMENTS CONCERNED 

EUROCOPTER will modify the following documents with respect to this ALERT SERVICE BULLETIN: 

The PRE, MET, MMA and MDE. 

These documents will be issued subsequently. 

1.M. TOOLING CONCERNED 

 Not applicable. 

1.N. INTERCHANGEABILITY AND MIXABILITY OF PARTS 

Not applicable. 
T.F.S. No. 00000380 

Approved under EASA DOA No. 21J.056 Page 5/18 

2007.03.22

2. ACCOMPLISHMENT INSTRUCTIONS 

2.A. GENERAL 

Refer to MTC (Standard Practices Manual) Work Card 20.02.06.402: Safetying with lockwire. 

Refer to MTC (Standard Practices Manual) Work Card 20.01.01.301: Greases. 

Only one procedure is described because the checks and greasing operations are the same for the 

two tangential gearboxes. 

2.B. OPERATIONAL PROCEDURE 

2.B.1. Checking the fuel shut-off controls. Figures 1 and 2 

- Remove the snap wire from the fuel shut-off controls (a). 

- For each fuel shut-off control (a), measure the fuel shut-off control (a) operating loads F1, F2 and F3

 using a spring scale, in accordance with the following procedure: 

CAUTION 

TO MEASURE THE OPERATING LOADS F1, F2 and F3, YOU 

MUST HOOK THE SPRING SCALE TO THE FUEL SHUT-OFF 

CONTROL (a): 

MOREOVER, DURING MEASUREMENT, THE SPRING 

SCALE PULLING DIRECTION MUST BE PERPENDICULAR 

TO THE FUEL SHUT-OFF CONTROL (a). 

• Pull the fuel shut-off control (a): 

. Disengage the fuel shut-off control (a) from detent A. 

. Measure the maximum control operating load F1 between detents A and B. 

. Move the fuel shut-off control (a) back to detent A. 

. Measure the F2 maximum load required to override detent A. 

. Measure the F3 maximum load required to override detent B. 

• If the F1 load value is equal to or below 3 daN, and if the F2 and F3 load values are equal to or 

below F1 + 1.5 daN, leave as is. Set the fuel shut-off controls (a) to their initial position and lock 

them with snap wire. 

• If the F1 load value is above 3 daN, or if one of the F2 or the F3 load values is above F1 + 1.5 daN, 

comply with paragraph 2.B.2. before resuming flights. 
T.F.S. No. 00000380 

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2007.03.22

2.B.2. Checking and grease-lubricating the tangential gearboxes. Figures 3 to 7. 

2.B.2.a. Preliminary steps 

- AS332 / AS532 helicopters except versions L2, A2 and U2. 

- Install the access equipment. 

- Open the sliding cowling and the engine cowlings. 

- Install the engine cowling walkways. 

- Open or remove: 

. panel 2 ALPHA from the electrics cabinet, 

. panel 51 ALPHA from the ceiling, 

. the soundproofing panels at the tangential gearbox and at the fuel shut-off cock. 

- Disconnect the micro-switches (b), Figure 3. 

- AS332 L2 and AS532 A2 and U2 helicopters 

- Install the access equipment. 

- Open the sliding cowling and engine cowlings. 

- Install the engine cowling walkways. 

- Open or remove: 

. the top panel from the electrics cabinet, 

. the overhead panel and the control linkage access panels. 

- Disconnect the micro-switches (b), Figure 4. 

- SA330 helicopters 

- Remove the center soundproofing panel from between frames 3245 and 3855. 

- Open the sliding cowling, the engine cowlings and install the walkways. 

2.B.2.b. Procedure 

TO ENSURE OPTIMUM RELIABILITY, YOU MUST TAKE THE 

FOLLOWING PRECAUTIONS WHEN HANDLING THE 

FLEXIBLE CONTROLS: 

– IT IS FORBIDDEN TO: 

• BEND THE SLIDING END, 

• USE EXCESSIVE FORCE ON THE CONTROL, 

• BEND THE FLEXIBLE CONTROLS. 

– IT IS ADVISABLE TO: 

• COMPLY WITH THE OPERATING LOADS, 

• INSTALL OR COIL THE FLEXIBLE CONTROLS BY 

 ENSURING A RADIUS GREATER THAN 150 mm. 

- Disengage the Teleflex cables (g) from the tangential gearbox (c). Figures 3 to 6 

. On the lever end. 

o Unlock and uncouple clevis (m). 

o Disengage the cable from swivel bearing retainer (p) by unscrewing it (note the number of 

turns) until it is disengaged from the tangential gearbox wheel. 

CAUTION 
T.F.S. No. 00000380 

Approved under EASA DOA No. 21J.056 Page 7/18 

2007.03.22

. On the fuel shut-off cock end. 

o Uncouple end-fitting (n) from the fuel shut-off cock lever. 

o Disengage the cable from swivel bearing retainer (q) by unscrewing it (note the number of 

turns) until it is disengaged from the tangential gearbox wheel. 

- Unlock and unscrew the end-fittings (f) 

- Remove the tangential gearbox (c): Figure 6 

. Unscrew and remove the nuts (j) and (k) and the washers (h) and (i). 

. Unscrew and remove the screws (d) and washers (e). 

- Open and clean the tangential gearbox (c) (with white spirit). 

- Check the condition of the tangential gearbox (c): 

• If there is corrosion in the tangential gearbox (c): 

o Scrap the tangential gearbox (c). 

o Open the new tangential gearbox (1). 

o Lubricate the interior of the tangential gearbox (1) with a small amount of G-354 

grease as shown on Figure 7, then close the tangential gearbox. 

• If there is no corrosion in the tangential gearbox (c): 

o Lubricate the interior of the tangential gearbox (c) with a small amount of G-354 

grease as shown on Figure 7, then close the tangential gearbox. 

- Install the tangential gearbox: Figure 6 

• Fit and tighten the screws (d) and washers (e). 

• Fit the washers (h) and (i), fit and tighten the nuts (j) and (k). 

WHEN FITTING THE WASHERS ON THE 

TANGENTIAL GEARBOX (c), THE LATTER MUST 

BE IN THE ASSEMBLY CONFIGURATION SHOWN 

ON FIGURE 6. 

• Lock the screws (d) with lockwire (2). 

- Apply G-354 grease to the cable and the visible areas of the slide tubes. 

- Tighten and lock the end-fittings (f) with lockwire (2). Figure 6. 

- Engage the Teleflex cables. Figures 3 to 5. 

• On the lever end. 

o Engage the cable until it comes into contact with the tangential gearbox wheel. 

o Screw the cable in accordance with the number of turns previously noted down. 

o Couple the clevis (m) to the fuel shut-off lever. Safety the clevis (m) with a cotter pin. 

CAUTION 
T.F.S. No. 00000380 

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2007.03.22

• On the fuel shut-off cock end. 

o Engage the cable until it comes into contact with the tangential gearbox wheel. 

o Screw the cable in accordance with the number of turns previously noted. 

o Couple the end-fitting (n) to the fuel shut-off cock lever and check that the end-fitting is 

locked. 

NOTE

After installation, the cables must not protrude from the guide 

tubes when the levers are in the forward position. The insertion 

depth of the cables in the guide tubes must be less than 10 mm 

(.394 in). 

- Actuate the fuel shut-off controls (a). The controls must be free to slide in each sheath. 

2.B.2.c. Adjustment and check 

- Adjust the tangential gearbox (c) friction as per (MET) Work Card 76.20.00.601 or (MMA) Sub-Task 

76-20-00-211-004 of Task 76-20-00-211. 

 

- Check: 

• the fuel shut-off control (a) travel as per (MET) Work Card 76.20.00.601 or (MMA) Task 76-20-00-

211 or (MDE) Work Card 76.20.601. 

• the ventilation flaps (l) as per (MET) Work Card 76.20.00.601 or (MMA) Sub-Task 76-20-00-211 -

001 of Task 76-20-00-601. 

- If necessary, adjust the fuel shut-off controls (a) as per (MET) Work Card 76.20.00.501 or 

 (MMA) 76-20-00-821 or (MDE) 76.20.501 

2.B.2.d. Final steps 

- AS332 / AS532 helicopters except versions L2, A2 and U2. 

• Set the fuel shut-off levers (a) to their initial position: 

. lock the fuel shut-off controls (a) with snap wire, 

. connect the micro-switches (b), Figure 3. 

. Replace the plastic rivets (3) as necessary. 

• Install and close: 

. panels 2ALPHA and 51ALPHA, 

. the soundproofing panels at the tangential gearbox and the fuel shut-off cock. 

• Close the engine cowlings and the sliding cowling. 

• Remove the engine cowling walkways. 

• Remove the access equipment. 

- AS332 L2 and AS532 A2 and U2 helicopters 

• Set the fuel shut-off levers (a) to their initial position: 

. lock the fuel shut-off controls (a) with snap wire, 

. connect the micro-switches (b), Figure 4, 

. replace the plastic rivets (3) as necessary. 

• In the cabin, install or close: 

 - the control linkage access panels and the overhead panel, 

 - the top panel of the electrics cabinet. 
T.F.S. No. 00000380 

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• Close the engine cowlings and the sliding cowling. 

• Remove the engine cowling walkways. 

• Remove the access equipment. 

 

- SA330 helicopters 

• Set the fuel shut-off controls (a) to their initial position. 

• Lock the fuel shut-off controls (a) with snap wire. 

• Install the center soundproofing panel between frames 3245 and 3855. 

• Close the sliding cowling and the engine cowlings. 

• Remove the walkways. 

2.C. IDENTIFICATION 

Record compliance with this ALERT SERVICE BULLETIN in the helicopter documents. 

2.D. OPERATING AND MAINTENANCE INSTRUCTIONS 

 

 Not applicable. 
T.F.S. No. 00000380 

Approved under EASA DOA No. 21J.056 Page 10/18 

2007.03.22

Figure 1 – Location of the fuel shut-off controls 

a 
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Figure 2 – Checking the fuel shut-off control

a 

F2

F1

F3

A

B 
T.F.S. No. 00000380 

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Figure 3 – Fuel shut-off control (C, C1, L, L1, B, B1, F1, M, M1, AC, AL, SC, UC, UE and UL) 

b 

c

1 

b 

a 

g

3

l 

m

n 
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2007.03.22

Figure 4 – Fuel shut-off control (L2, A2 and U2) 

c

1

a 

g

b 

3

l 

n 

m
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Figure 5 – Fuel shut-off control (SA330) 

a 

c

1

g 

m 

n

p 

q
T.F.S. No. 00000380 

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Figure 6 – Tangential gearbox Removal / Installation 

c

1 

d

e 

i 

h 

j 

k 

f 2 
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Figure 7 – Lubricating the tangential gearbox with grease 

Tangential gearbox 

areas to be lubricated 

with grease 
T.F.S. No. 00000380 

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2007.03.22

3. MATERIAL INFORMATION

3.A. MATERIAL: COST – AVAILABILITY 

For any information concerning kits and / or components, contact the Sales and Customer Relations 

Department of the EUROCOPTER Network. 

3.B. INFORMATION CONCERNING INDUSTRIAL SUPPORT 

Not applicable. 

3.C. MATERIAL REQUIRED FOR EACH HELICOPTER / ENGINE / COMPONENT 

3.C.1. Kit(s) or component(s) to be ordered for one helicopter or one assembly 

Material Part Number Qty Item Key Word Former Part 

Number Instructions 

 

332A57231000 AR 1 Tangential gearbox As necessary 

23310CA015015 2 Cotter pin 

 

3.C.2. Items to be ordered separately 

 Material Part Number Qty Item Key Word 

 

 AIR4210/B or G-354 AR Grease 

 EN3628-0,8 AR 2 Lockwire, 0.8 diameter 

 23321 AR Snap wire, annealed copper, 

0.3 diameter 

 CARECLEAN-AS1 AR White-Spirit 

 52607NOIR 2 3 Plastic rivet 

The products required for compliance with the Tasks and / or Work Cards listed in paragraph 1.K., can 

be ordered from the INTERTURBINE company. 

Website: http://www.itlogistics.de

Telephone: +49.41.91.809.300 

AOG: +49.41.91.809.444 
T.F.S. No. 00000380 

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2007.03.22

3.D. PROCUREMENT CONDITIONS

Order the required quantity (unless otherwise specified) 

from 

EUROCOPTER 

Etablissement de Marignane 

Sales and Customer Relations Department 

ECR 

13725 MARIGNANE CEDEX 

FRANCE 

NOTE 1

For ALERT SERVICE BULLETINS, order by: 

Telex: HELICOP 410 969F 

Fax: +33 (0)4 42 85 99 96 

NOTE 2

On the purchase order, please specify the mode of 

transport, the destination and the serial numbers of the 

helicopters to be modified. 

4. APPENDIX 

 

Not applicable.