### T.F.S. No. 00000380

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

2007.03.22 EUROCOPTER

DIRECTION TECHNIQUE SUPPORT

13725 MARIGNANE C EDEX F RANCE



# 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-o ff 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) Ma intenance Program) of the fuel shut-off controls

on two helicopters, one of the fuel shut-off contro ls 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 gr own hard, and in one of these two cases, the

right tangential gearbox showed tr aces 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 clos ing, 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 sw itching-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 t he fuel shut-off controls and to grease-lubricate the

tangential gearboxes.

### T.F.S. No. 00000380

Approved under EASA DOA No. 21J.056 Page 3/18

2007.03.22 

### 1.E. COMPLIANCE

EUROCOPTER renders compliance with th is 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 cont rols, 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 ol d, comply with paragraph 2.B.1.

. Interpretation of the results:

. If there is no hard point in the fuel shut-off c ontrols, 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 helicopte rs subject to an Airworthiness Certificate.

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

on March 21, 2007 under the authori ty of EASA Design Organisa tion Approval No. 21J.056.

### T.F.S. No. 00000380

Approved under EASA DOA No. 21J.056 Page 4/18

2007.03.22 The technical information contained in Revision 1 of this ALERT SERVICE BU LLETIN was approved

on March 22, 2007 under the authori ty of EASA Design Organisa tion 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): Wo rk Cards 20.02.06.402 - 20.01.01.301



### 1.L. OTHER DOCUMENTS CONCERNED

EUROCOPTER will modify the follo wing 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 Manu al) 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 F 1 , F 2 and F 3 using a spring scale, in accordan ce with the following procedure:



### CAUTION

TO MEASURE THE OPERATING LOADS F 1 , F 2 and F 3 , YOU

MUST HOOK THE SPRING SCAL E 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 F 1 between detents A and B.

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

. Measure the F 2 maximum load required to override detent A.

. Measure the F 3 maximum load required to override detent B.

• If the F 1 load value is equal to or below 3 daN, and if the F 2 and F 3 load values are equal to or

below F 1 + 1.5 daN, leave as is. Set the fuel shut-off c ontrols (a) to their initial position and lock

them with snap wire.

• If the F 1 load value is above 3 daN, or if one of the F 2 or the F 3 load values is above F 1 + 1.5 daN,

comply with paragraph 2.B.2. before resuming flights.

### T.F.S. No. 00000380

Approved under EASA DOA No. 21J.056 Page 6/18

2007.03.22 2.B.2. Checking and grease-lubricating t he 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-sw itches (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 retain er (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 retain er (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 gear box (c) (with white spirit).

- Check the condition of t he 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 gea rbox (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), fi t 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 cont act 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 leve r. Safety the clevis (m) with a cotter pin. 

### CAUTION

### T.F.S. No. 00000380

Approved under EASA DOA No. 21J.056 Page 8/18

2007.03.22 • On the fuel shut-off cock end.

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

o Screw the cable in accordance with th e 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 th e 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 co ntrols must be free to slide in each sheath.

2.B.2.c. Adjustment and check

- Adjust the tangential gearbox (c) friction as pe r (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 Ca rd 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-swit ches (b), Figure 3.

. Replace the plastic rivets (3) as necessary.

• Install and close:

. panels 2ALPHA and 51ALPHA,

. the soundproofing panels at the tangenti al 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-swit ches (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

Approved under EASA DOA No. 21J.056 Page 9/18

2007.03.22 • 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 soundproofi ng 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 SERVIC E 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

### T.F.S. No. 00000380

Approved under EASA DOA No. 21J.056 Page 11/18

2007.03.22 Figure 2 – Checking the fuel shut-off control 

### a



# F 2 

# F 1



# F 3 A

B

### T.F.S. No. 00000380

Approved under EASA DOA No. 21J.056 Page 12/18

2007.03.22 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

### T.F.S. No. 00000380

Approved under EASA DOA No. 21J.056 Page 13/18

2007.03.22 Figure 4 – Fuel shut-off control (L2, A2 and U2) 

### c

1 a g b

3

l n

m

### T.F.S. No. 00000380

Approved under EASA DOA No. 21J.056 Page 14/18

2007.03.22 Figure 5 – Fuel shut-off control (SA330) 

### a c

1

g m

n p q

### T.F.S. No. 00000380

Approved under EASA DOA No. 21J.056 Page 15/18

2007.03.22 Figure 6 – Tangential gearbox Removal / Installation 

### c

1 d

e

i

h

j

k f 2

### T.F.S. No. 00000380

Approved under EASA DOA No. 21J.056 Page 16/18

2007.03.22 Figure 7 – Lubricating the tange ntial gearbox with grease 

### Tangential gearbox

areas to be lubricated

with grease

### T.F.S. No. 00000380

Approved under EASA DOA No. 21J.056 Page 17/18

2007.03.22 

### 3. MATERIAL INFORMATION

3.A. MATERIAL: COST – AVAILABILITY

For any information concerning kits and / or comp onents, 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 or dered 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

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

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.