APR 11 Page 1 / 7

Amdt. X --- DAT XX

REFERENCE : MOD70 ---0318 ---34

SUBJECT : STANDBY COMPASS LIGHTING

EFFECTIVITY : TBM 700 aircraft S/N 148, 434 to 572, 574, 576.

NOTE :

For aircraft S/N 573, 575, 577 to 9999, the modification No. MOD70 ---0318 ---34 is applied at

the factory.

For aircraft S/N 1 to 147, 149 to 433, the modification No.MOD70 ---0318 ---34 is done during

application of modification No. MOD70 ---0276 ---00.

REASON :

A. PROBLEM

Reported occurence of loss of both essential bus bars ESS BUS 1 and ESS BUS 2 due

to handling of standby compass lighting bulb cover in flight which caused the loss of Pilot

PFD, Engine/Airframe indication, Keyboard, GPS/COM/NAV 1, Air Data Computer 1,

AHRS # 1, LDG indication, GMA # 1, resulting in possible important workload under some

conditions of use.

B. REASON

Electrical protection not suitable for handling of the standby compass lighting cover when

energized.

C. SOLUTION

Addition of a fuse on the wire at the standby compass connector.

SUMMARY :

A. PREPARATION

B. INSTALLATION OF PROTECTION FUSE

C. RECONDITIONING

COMPLIANCE : Within the 6 months following distribution of this Service Bulletin.

WARRANTY : The parts will be taken under warranty as well as manpower.

SERVICE BULLETIN

TBM AIRCRAFT

MANDATORY

The technical content of this document is approved

under the authority of DOA No. EASA.21J.013

is the subject of an AD

SB 70 -- 192

AMENDMENT 1

34

ATA No.

SOCATA

Direction des Services TELEPHONE : 33 (0)5 62.41.73.00

65921 TARBES CEDEX 9 TELEFAX : 33 (0)5 62.41.76.54

FRANCE
SERVICE BULLETIN

TBM AIRCRAFT

MANDATORY

The technical content of this document is approved

under the authority of DOA No. EASA.21J.013

is the subject of an AD

SB 70 -- 192

AMENDMENT 1

34

ATA No.

APR 11 Page 2 / 7

Amdt. X --- DAT XX

PROCURABLE MATERIAL :

Aircraft S/N 434 to 572, 574, 576

Kit No. OPT70 K131 ---34 to be ordered from your TBM spare parts distributor.

Item Part number Description Qty/aircraft

10 T700A342000900001 Fuse holder assy 1

2 4247754001 Protection extrusion AR

5 7016110102 Linking ring 5

6 7141249231 Ty ---wrap 5

7 7141249232 Ty ---wrap 5

8, 9 7791110002 Support 2

NOTE :

The kit contents is only given for information and will not be updated.

Aircraft S/N 148 which has received Modification No. MOD70 ---0276 ---00 in retrofit

Kit No. OPT70 K130 ---34 to be ordered from your TBM spare parts distributor

Item Part number Description Qty/aircraft

10 T700A342000900000 Fuse holder assy 1

2 4247754001 Protection extrusion AR

5 7016110102 Linking ring 5

6 7141249231 Ty ---wrap 5

7 7141249232 Ty ---wrap 5

8, 9 7791110002 Support 2

NOTE :

The kit contents is only given for information and will not be updated.

CONSUMABLE MATERIAL (Local purchase) :

--- Cleaning agent Methyl ---Ethyl ---Ketone (M.E.K.)

TOOLING :

--- Standard aeronautical maintenance station tools

MANPOWER :

--- 1 aeronautical mechanic : 1 hour

TECHNICAL INCIDENCES :

--- None

ACCOMPLISHMENT INSTRUCTIONS :

NOTE :

Operations required in this Service Bulletin must be accomplished by persons authorized by

their Airworthiness Authorities and according to the procedure described hereafter.
SERVICE BULLETIN

TBM AIRCRAFT

MANDATORY

The technical content of this document is approved

under the authority of DOA No. EASA.21J.013

is the subject of an AD

SB 70 -- 192

AMENDMENT 1

34

ATA No.

APR 11 Page 3 / 7

Amdt. X --- DAT XX

A. PREPARATION --- see Figures 1 and 2

CAUTION

THE COMPASS IS A SENSITIVE AND FRAGILE INSTRUMENT. NEVER BUMP IT AND

ALWAYS USE NON --MAGNETIC TOOLS.

1) Make sure the ”SOURCE” selector is set to ”OFF” and the crash lever is in down

position.

2) Install the warning sign prohibiting ”SOURCE” selector operation

WARNING

DO NOT OPERATE

MAINTENANCE WORK IN PROGRESS

3) Remove the central windshield bow (1) cover.

a) Remove the two screws securing the cover.

b) Remove the cover.

4) If necessary, remove the screws securing the upholstery in front of PL40 panel, to gain

access to standby compass (4) connector (3).

5) Disconnect the connector (3).

B. INSTALLATION OF PROTECTION FUSE --- see Figures 1, 2 and 3

CAUTION

THE FUSE HOLDER ASSY CONNECTORS ARE CONNECTED SO AS TO INSERT F52

FUSE IN SERIES ON STANDBY COMPASS ELECTRIC SUPPLY.

1) Connect both fuse holder assy (10) P/N T700A32000900000 or T700A342000900001

connectors in compliance with aircraft configuration.

2) Mark the position of supports (8) and (9) P/N 7791110002.

3) With a cloth soaked in MEK, clean the bonding area of supports (8) and (9) on central

windshield bow (1) cover.

4) Bond both supports (8) and (9).

5) If necessary, install a piece of protection extrusion (2) P/N 4247754001 on central

windshield bow (1) cover.

6) As needed, secure linking rings (5) P/N 7016110102 on antenna feeder (11), then

fuse holder assy (10) cable on linking ring (5) with tie ---wraps (6) P/N 7141249231

and/or (7) P/N 7141249232.

7) With tie ---wraps (6) and (7), secure fuse holder on supports (8) and (9).

C. RECONDITIONING

1) Make sure all the tools and materials are removed and the work area is clean and free

from debris.
SERVICE BULLETIN

TBM AIRCRAFT

MANDATORY

The technical content of this document is approved

under the authority of DOA No. EASA.21J.013

is the subject of an AD

SB 70 -- 192

AMENDMENT 1

34

ATA No.

APR 11 Page 4 / 7

Amdt. X --- DAT XX

2) Perform an operating test of standby compass lighting.

3) If removed, install attaching screws of the upholstery panel located in front of PL40

panel.

4) Remove the central windshield bow (1) cover.

5) Remove the warning sign prohibiting ”SOURCE” selector operation.

UPDATING OF THE AIRCRAFT DOCUMENTATION :

Upon completion of Service Bulletin No. SB 70 ---192 ---34 (Reference MOD70 ---0318 ---34)

”STANDBY COMPASS LIGHTING”, make an appropriate maintenance record entry.

Keep wiring diagram provided in Figure 3 in aircraft logbook.

WARNING : SOCATA considers that it is MANDATORY for operators to comply with the instructions of

this SB.

Operators who arbitrarily ignore the compliance statement indicated in this SB do so at their

own risk.
SERVICE BULLETIN

TBM AIRCRAFT

MANDATORY

The technical content of this document is approved

under the authority of DOA No. EASA.21J.013

is the subject of an AD

SB 70 -- 192

AMENDMENT 1

34

ATA No.

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Amdt. X --- DAT XX

Figure 1 --- Installation of protection fuse

Aircraft S/N 1 to 99, 101 to 433 which have received modification No. MOD70 ---0276 ---00 in retrofit

1 --- Central windshield bow

2 --- Protection extrusion

3 --- Connector

4 --- Standby compass

5 --- Linking ring

6 --- Ty ---wrap

7 --- Ty ---wrap

8 --- Support

9 --- Support

10 --- Fuse holder assy

11 --- Antenna feeder
SERVICE BULLETIN

TBM AIRCRAFT

MANDATORY

The technical content of this document is approved

under the authority of DOA No. EASA.21J.013

is the subject of an AD

SB 70 -- 192

AMENDMENT 1

34

ATA No.

APR 11 Page 6 / 7

Amdt. X --- DAT XX

Figure 2 --- Installation of protection fuse

Aircraft S/N 434 to 572, 574, 576

1 --- Central windshield bow

2 --- Protection extrusion

3 --- Connector

4 --- Standby compass

5 --- Linking ring

6 --- Ty ---wrap

7 --- Ty ---wrap

8 --- Support

9 --- Support

10 --- Fuse holder assy

11 --- Antenna feeder
SERVICE BULLETIN

TBM AIRCRAFT

MANDATORY

The technical content of this document is approved

under the authority of DOA No. EASA.21J.013

is the subject of an AD

SB 70 -- 192

AMENDMENT 1

34

ATA No.

APR 11 Page 7 / 7

Amdt. X --- DAT XX

Figure 3 --- Wiring diagram

All