C U S T

O M E R S E R V I C E S D I R E C T O R A T E

1 R O N D P O I N T M A U R I C E B E

L L O N T E

3 1 7 0 7 B L A G N

A C C E D E X F R A N C E

T E L E P H O N E + 3 3 ( 0 ) 5 6 1 9 3 3 3 3 3



# A L E R T O P E R

A T O R S T R

A N S M I S S I O N

- A O T

AOT ref: A71N010-15 Rev 00 Page 1 of 4 Date: 30-SEP-2015

© AIRBUS S.A.S. 2015

. ALL RIGHTS RESERVED. CONFIDENTIAL AND PROPRIETARY DOCUMENT S U B J E C T : A T A 7 1

– C F M 5 6

- 5 A

- F W D E N G I N E M O U N T B O L T S

- T O R Q U E C H E C K

A I R C R A F T T Y P E : A 3 1 9

, A 3 2 0

O U R R E F

. : A 7 1 N 0 1 0

- 1 5 R e v 0 0 d a t e d 3 0

- S E P

- 2 0 1 5

.

1

. A I R C R A F T A F F E C T E D

A p p l i c a b l e t o A 3 1 9 & A 3 2 0 p o w e r e d w i t h C F M 5 6

- 5 A e n g i n e s w h i c h h a v e p e r f o r m e d A M M t a s k 7 1

- 0 0

-

0 0

- 4 0 0

- 0 4 0

- A 0 1 “ I n s t a l l a t i o n o f t h e p o w e r p l a n t w i t h t h e e n g i n e p o s i t i o n e r T W W 7 5 E ” b e t w e e n M a y

2 0 1 3 a n d A u g u s t 2 0 1 5

.

2

. R E F E R E N C E D D O C U M E N T A T I O N

A M M t a s k 7 1

- 0 0

- 0 0

- 4 0 0

- 0 4 0

- A 0 1

AMM task 71-13-00-010-040-A

AMM task 78-36-00-010-040-A

AMM task 78-30-00-481-041-A

AMM task 78-36-00-410-040-A

AMM task 78-30-00-081-041-A

AMM task 71-13-00-410-040

I P C C h a p t e r 7 1

- 2 1

- 1 1

- 0 1

I P C C h a p t e r 7 1

- 2 1

- 1 1

- 0 1 A

C M M t a s k 7 1

- 2 1

- 0 6

3

. R E A S O N

W r o n g u n i t s f

o r F w d E n g i n e M o u n t b o l t t o r q u e w e r e i n t r o d u c e d i n t h e M a y 2 0 1 3 r e v i s i o n o f t h e A M M

, i n

t a s k 7 1

- 0 0

- 0 0

- 4 0 0

- 0 4 0

- A 0 1 “ I n s t a l l a t i o n o f t h e p o w e r p l a n t w i t h t h e e n g i n e p o s i t i o n e r T W W 7 5 E ”

.

3

. 1 F A C T S

D u r i n g m a i n t e n a n c e

, a n o p e r a t o r r e p o r t e d t o A i r b u s i n c o n s i s t e n t F w d E n g i n e M o u n t t o r q u e u n i t s w i t h i n

A M M i n s t r u c t i o n s

. T h i s e r r o r h a s t h e f

o l l o w i n g i m p a c t :

- C F M 5 6

- 5 A

- A M M t a s k 7 1

- 0 0

- 0 0

- 4 0 0

- 0 4 0

- A 0 1 “ I n s t a l l a t i o n o f t h e p o w e r p l a n t w i t h t h e e n g i n e p o s i t i o n e r

T W W 7 5 E ”

T o t o r q u e t h e f

o r w a r d b o l t u s i n g t h e t o o l a d a p t o r P N 9 8 D 7 1 2 0 3 0 0 2 2 0 6

, t h e t o r q u e v a l u e w a s g i v e n i n

“ l b f

. i n ” i n s t e a d o f “ l b f

. f

t ”

.

3

. 2 C O N S E Q U E N C E S

T h i s c o n d i t i o n

, i f n o t c o r r e c t e d

, c o u l d c a u s e s e v e r e d a m a g e t o t h e p y l o n b o l t s a n d a d j a c e n t s t r u c t u r e s

, l e a d i n g t o p o t e n t i a l f

a i l u r e

. B e s i d e s

, i f c o m b i n e d w i t h a n y m a i n t e n a n c e d a m a g e

, i t c o u l d l e a d t o f w d

e n g i n e m o u n t f

a i l u r e

, p o s s i b l y r e s u l t i n g i n e n g i n e d e t a c h m e n t

.

# A L E R T O P E R A T O R S T R

A N S M I S S I O N

- A O T

AOT ref: A71N010-15 Rev 00 Page 2 of 4 Date: 30-SEP-2015

© AIRBUS S.A.S. 2015

. ALL RIGHTS RESERVED. CONFIDENTIAL AND PROPRIETARY DOCUMENT 3

. 3 A I M

T h e a i m o f t h i s A O T i s t o p r o v i d e o p e r a t o r s w i t h t h e i n s t r u c t i o n s t o p e r f o r m a o n e

- t i m e t o r q u e c h e c k o f

t h e F W D e n g i n e m o u n t b o l t s a n d s u b s e q u e n t r e p l a c e m e n t a n d i n s p e c t i o n a t n e x t e n g i n e r e m o v a l

.

T h i s A O T a p p l i e s t o a i r c r a f t w i t h i n t h e e f

f e c t i v i t y d e f i n e d i n p a r a g r a p h 1 o f t h i s A O T

.

4

. S H O R T T E R M A C T I O N

4

. 1 P L A N N I N G A N D M A N P O W E R

4

. 1

. 1 A C C O M P L I S H M E N T T I M E S C A L E

A i r b u s r e q u i r e s t h a t t h e i n s p e c t i o n s

, a s p e r p r o c e d u r e d e s c r i b e d i n p a r a g r a p h 4

. 2

, a r e c a r r i e d o u t a t f i r s t

o p p o r t u n i t y a n d n o l a t e r t h a n 3 m o n t h s a f t e r r e c e i p t o f t h i s “ A l e r

t O p e r a t o r s T r a n s m i s s i o n ”

.

4

. 1

. 2 M A N P O W E R

T h e e s t i m a t e d t i m e t o p e r f o r m t h e i n s p e c t i o n i s 2

. 5 m a n

- h o u r s ( M H ) p e r e n g i n e :

- G e t a n d c l o s e a c c e s s : 2 M H

- C h e c k t o r q u e o f f

w d b o l t s : 0

. 5 M H

T h e e s t i m a t e d t i m e t o p e r f o r m t h e c o r r e c t i v e a c t i o n ( s ) i n c a s e o f f i n d i n g s i s :

- T o r q u e i n g o f a n u n d e r

- t o r q u e d b o l t ( g e t a n d c l o s e a c c e s s t i m e n o t i n c l u d e d ) : 0

, 5 M H

o R e p l a c e m e n t o f a l l f w d e n g i n e m o u n t b o l t s

, n u t s a n d w a s h e r s ( a l l b o l t s a t o n c e ) : N / A

( b e c a u s e i t i s d o n e a t e n g i n e r e m o v a l )

4

. 2 D E S C R I P T I O N

T h e r e q u i r e m e n t s o f t h i s A O T c o n s i s t i n c h e c k i n g t h e F w d E n g i n e M o u n t b o l t s t o r q u e v a l u e s

, a n d r e

t o r q u e i f n e c e s s a r

y

.

4

. 2

. 1 A C C E S S

Open the fan cowl doors as per AMM Task 71-13-00-010-040-A.

Make the thrust reverser unserviceable as per AMM task 78-30-00-481-041-A.

Open the thrust reverser doors as per AMM task 78-36-00-010-040-A.

Perform the inspection as per paragraph 4.2.2 and replace if necessary as per paragraph 4.2.3.

Close the thrust reverser doors as per AMM task 78-36-00-410-040-A.

Make the thrust reverser serviceable as per AMM task 78-30-00-081-041-A.

Close the fan cowl doors as per AMM task 71-13-00-410-040-A.

4

. 2

. 2 I N S P E C T I O N R E Q U I R E M E N T S

M a r k a l l f

o u r p y l o n b o l t s h e a d s a n d a d j a c e n t a r e a s t o p r o v i d e a r e f e r e n c e p o i n t t o i n d i c a t e i f t h e b o l t

m o v e s

.

# A L E R T O P E R A T O R S T R

A N S M I S S I O N

- A O T

AOT ref: A71N010-15 Rev 00 Page 3 of 4 Date: 30-SEP-2015

© AIRBUS S.A.S. 2015

. ALL RIGHTS RESERVED. CONFIDENTIAL AND PROPRIETARY DOCUMENT A p p l y a t o r q u e o f 3 2 0 l b f

. f t ( 4 3

. 3 9 m

. d a N ) i n a c l o c k w i s e d i r e c t i o n ( t i g h t e n i n g d i r e c t i o n ) t o a l l f o u r

f o r w a r d e n g i n e m o u n t p y l o n b o l t s

, t o c h e c k f o r a n u n d e r

- t o r q u e c o n d i t i o n

.

 If using tool adaptor P/N 98D71203002206 with the angle of 22.5 degrees: set the torque wrench

to 301 lbf.ft (40.81 m.daN) to get the required TORQUE.

 If using tool adaptor P/N 98D71203002206 with the angle of 67.5 degrees: set the torque wrench

to 307 lbf.ft (41.62 m.daN) to get the required TORQUE.

4

. 2

. 3 F I N D I N G S

4

. 2

. 3

. 1 I n s t r u c t i o n s

C h e c k t h e m a r k i n g a p p l i e d i n p a r a 4

. 2

. 2 t o c o n f i r m i f t h e b o l t h a s m o v e d

.

- I f o n e o r m o r e b o l t r o t a t e s :

o B e f o r e n e x t f l i g h t :

o Re-torque twice the affected bolt(s) between 320 and 350 lbf.ft (43.39 and 47.45 m.daN)

 If using tool adaptor P/N 98D71203002206 with the angle of 22.5 degrees: set

the torque wrench to between 301 and 329 lbf.ft (40.81 and 44.60 m.daN) to get

the required TORQUE.

 If using tool adaptor P/N 98D71203002206 with the angle of 67.5 degrees: set

the torque wrench to between 307 and 336 lbf.ft (41.62 and 45.55 m.daN) to get

the required TORQUE.

o A t n e x t e n g i n e r e m o v a l :

o D i s c a r d a n d r e p l a c e t h e 4 b o l t s

, n u t s a n d w a s h e r s b y n e w o n e s

, a n d p r o c e e d t o i n s p e c t i o n

c h e c k

. R e f

e r t o p a r a g r a p h 4

. 2

. 3

. 2 f o r p r o c e d u r e d e t a i l s

.

N O T E : I n s p e c t i o n o u t c o m e w i t h o r w i t h o u t f i n d i n g s h a s t o b e s e n t t o A i r b u s C u s t o m e r S e r v i c e s

E n g i n e e r i n g

.

4

. 2

. 3

. 2 P r o c e d u r e D e t a i l s

B o l t r e p l a c e m e n t o f

f

- w i n g a n d i n s p e c t i o n t o c a r r y o u t :

- P r o c e e d t o e n g i n e r e m o v a l a s p e r A M M T a s k 7 1

- 0 0

- 0 0 P B 4 0 1

.

- R e m o v e t h e 4 p y l o n b o l t s a n d a s s o c i a t e d n u t s a n d w a s h e r s

, a n d r e p l a c e t h e m b y n e w o n e s

.

- P e r f o r m F l u o r e s c e n t P e n e t r a n t I n s p e c t i o n a n d d i m e n s i o n a l c h e c k o n i m p a c t e d f o r w a r d e n g i n e

m o u n t p l a t f

o r m p y l o n b o l t h o l e s w h e n e n g i n e i s r e m o v e d

. R e f e r t o C F M 5 6

- 5 A C M M 7 1

- 2 1

- 0 6

i n s t r u c t i o n s

.

o I f n i l f i n d i n g

, f

o r w a r d e n g i n e m o u n t p l a t f o r m c a n b e r e i n s t a l l e d

.

o I f l o c a l d e f

o r m a t i o n o r c r a c k s a r e f o u n d d u r i n g t h e c h e c k

, r e p l a c e t h e f o r w a r d p l a t f

o r m

b e f o r e n e x t f l i g h t

.

- I n s t a l l t h e e n g i n e a s p e r A M M T a s k 7 1

- 0 0

- 0 0 P B 4 0 1

.

4

. 3 S P A R E S A N D T O O L I N G

A 3 2 0 C F M 5 6

- 5 A I P C 7 1

- 2 1

- 1 1

- 0 1 /

- 0 1 A i t e m 2 5 0 B o l t 8 3 7 6 9 H 1 4

- 1 7

A 3 2 0 C F M 5 6

- 5 A I P C 7 1

- 2 1

- 1 1

- 0 1 /

- 0 1 A i t e m 2 6 0 W a s h e r V N 9 3 6 N P 1 4 C

A 3 2 0 C F M 5 6

- 5 A I P C 7 1

- 2 1

- 1 1

- 0 1 /

- 0 1 A i t e m 2 7 0 N u t V N 4 0 1 B 1 4 4

# A L E R T O P E R A T O R S T R

A N S M I S S I O N

- A O T

AOT ref: A71N010-15 Rev 00 Page 4 of 4 Date: 30-SEP-2015

© AIRBUS S.A.S. 2015

. ALL RIGHTS RESERVED. CONFIDENTIAL AND PROPRIETARY DOCUMENT 5

. F U R T H E R I N F O R M A T I O N

5

. 1 F O L L O W

- U P P L A N

N o f u r t h e r a c t i o n i s e x p e c t e d f o l l o w i n g A O T c o m p l e t i o n

.

5

. 2 I M P A C T E D D O C U M E N T A T I O N

N / A

6

. A O T A P P R O V

A L

The technical content of this document is approved under the authority of DOA nr. EASA.21J.031.

7

. R E P O R T I N G

Q u e s t i o n s a b o u t t h i s A O T a n d i n s p e c t i o n r e s u l t s w i t h o r w i t h o u t f i n d i n g s a r e t o b e a d d r e s s e d t o A i r b u s

C u s t o m e r S e r

v i c e s t h r o u g h TechRequest o n A i r b u s W o r l d

, s e l e c t i n g E n g i n e e r i n g D o m a i n a n d A T A

7 1

- 2 1 / T o p i c A O T A 7 1 N 0 1 0

- 1 5 R e v 0 0

.

B e s t R e g a r d s

,

Jean-Luc MOUYSSET

V I C E P R E S I D E N T E N G I N E E R I N G S U P P O R T

C U S T O M E R S E R V I C E S Gilles DE CEVINS

VICE PRESIDENT A320 PROGRAMME

CUSTOMER SERVICES