Socata SB 70-176: No revision named, text

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Page 1OCROpen in PDF

A DAHER-SOCATA 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

TBM AIRCRAFT SERVICE BULLETIN SB 70-176 AMENDMENT 1 21 ATA No.

MANDATORY The technical content of this document is approved under the authority of DOA No. EASA.21J.013 is the subject of an AD REFERENCE: MOD70-0243-21 SUBJECT: PULLEY DRIVE ASSEMBLY EFFECTIVITY: TBM 850 aircraft from S/N 434 to 509, 511 to 516, 519, 520, 522 to 525.

NOTE :

For the other aircraft, the modification MOD70-0243-21 is applied at the factory.

REASON A. PROBLEM Stringent inspection for standby alternator and compressor support and time limit for pulley drive assembly.

B. REASON Inspection and time limit required by SB70-161-21.

C. SOLUTION Replacement of standby alternator and compressor support and pulley drive assemblies.

REASON OF AMENDMENT 1 :

Addition of setting washers (27) and (28).

SUMMARY A. PREPARATION B. REMOVAL OF PULLEY DRIVE ASSEMBLY C. INSTALLATION OF PULLEY DRIVE ASSEMBLY D. RECONDITIONING COMPLIANCE: During next aircraft scheduled inspection, and at the latest on December 31, 2010.

NOTE :

Application of this SB cancels application of SB70-161-21.

WARRANTY: Manpower and parts will be covered under warranty within granted time limit until March 31, 2011.

PROCURABLE MATERIAL:

- Parts to be ordered from your TBM spare parts distributor.

Item Part number Description Qty/aircraft 9 7423060001 Gasket 14 6046297261 Belt NOV 09 Page 1 / 7 Amdt. 1 - FEB 10

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TBM AIRCRAFT SERVICE BULLETIN SB 70-176 AMENDMENT 1 21 ATA No.

MANDATORY The technical content of this document is approved under the authority of DOA No. EASA.21J.013 is the subject of an AD Item Part number Description Qty/aircraft 15 7133601710 Belt 1 22-34 5415371227 Nut 2 23 T700G215500700100 Support 1 24 T700G215513500000 Pulley drive assy 1 25 T700G215514010000 Spacer 1 26 T700A2430036101 Shouldered washer 2 27 T700G215515810000 Laminated washer 1 28 5741139316 Washer 31 T700G215503110200 Tension adjuster 1 32 5741503260 Washer 2 33 5101301006 Bolt 1 CONSUMABLE MATERIAL (Local purchase) :

- Wrench drive: SAM P/N 111-60 Alignment tool P/N T700G2199005103 or equivalent as per drawing T700G2199005103

- MASTINOX (TB05-002A) Tie -wraps

TOOLING

- Standard aeronautical maintenance station tools MANPOWER :

- 1 aeronautical mechanic : 8 hours 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.

A. PREPARATION

1) Make sure the "SOURCE" selector is set to "OFF".

NOV 09 Page 2 / 7 Amdt. 1 - FEB 10

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TBM AIRCRAFT SERVICE BULLETIN SB 70-176 AMENDMENT 1 21 ATA No.

MANDATORY The technical content of this document is approved under the authority of DOA No. EASA.21J.013 is the subject of an AD

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

WARNING

DO NOT OPERATE

MAINTENANCE WORK IN PROGRESS

3) Open engine cowling 131.

4) Remove the battery - refer to Chapter 24-30-04 of the Maintenance Manual.

B. REMOVAL OF PULLEY DRIVE ASSY - see Figures 1 and 3

1) Loosen both nuts (38) without removing them.

2) Remove compressor without disconnecting it from refrigerant system, hold it with straps and discard belt (14) and spacer (16) - refer to Chapter 21-55-01 of the Maintenance Manual. Ease lines by removing tie -wraps securing them on top of the engine.

CAUTION

DO NOT BEND REFRIGERANT SYSTEM LINES

3) Remove alternator without disconnecting it, install it at the location of the battery and discard belt (15) - refer to Chapter 24-30-05 of the Maintenance Manual.

CAUTION

AVOID ANY TENSION ON ELECTRICAL WIRES REMOVING SOME TIE-WRAPS

4) Disconnect the cooling hose on generator side.

5) Remove and discard alternator support (8) - refer to Chapter 24-30-06 of the Maintenance Manual.

6) Remove tension adjuster (36) equipped with bolts (37) and nuts (35) from alternator support (8).

7) Remove nut (6) and alternator support (8).

8) Remove and discard pulley drive assembly (12), gasket (9) - refer to Chapter 24-30-06 of the Maintenance Manual.

9) Install a blanking cap on the engine.

C. INSTALLATION OF PULLEY DRIVE ASSEMBLY - see Figures 2 and 3

1) Remove blanking cap.

2) Install new pulley drive assembly (24) with a new gasket (9) - refer to Chapter 24-30-06 of the Maintenance Manual.

3) Install compressor belt tension adjuster (36) equipped with bolts (37), nuts (35) and shouldered washers (26) P/N T700A243003610100 on support (23).

4) Install support (23) - refer to Chapter 24-30-06 of the Maintenance Manual.

NOTE :

Do not lockwire.

NOV 09 Page 3 / 7 Amdt. 1 - FEB 10

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TBM AIRCRAFT SERVICE BULLETIN SB 70-176 AMENDMENT 1 21 ATA No

MANDATORY The technical content of this document is approved under the authority of DOA No. EASA.21J.013 is the subject of an AD

5) Install nut (22) and torque to 33.6 + 1.8 Ibf.in (3.8 + 0.2 N.m).

6) Install compressor with a new belt (14) and spacer (25) - refer to Chapter 21-55-01 of the Maintenance Manual.

NOTE :

Do not lockwire.

7) Tighten both nuts (38).

8) Install alternator with a new belt (15) - refer to Chapter 24-30-05 of the Maintenance Manual.

NOTE :

Do not lockwire.

9) Tighten alternator belt (15) and compressor belt (14) - refer to Chapters 21-55-01 and 24-30-05 of the Maintenance Manual.

NOTE :

Do not lockwire.

10) Check and, if necessary adjust alignment of pulley drive assembly and alternator pulleys - refer to Chapter 24-30-05 of the Maintenance Manual.

11) Mark alternator pulley (39), lockwire compressor belt tension adjuster (35) and pulley drive assy (24).

12) Secure electrical wires with tie-wraps.

13) Install attaching clamp or compressor lines on top of the engine.

14) Connect cooling pipe on generator side.

15) Install battery - refer to Chapter 24-30-04 of the Maintenance Manual.

16) Recondition the aircraft - see Paragraph D.

D. RECONDITIONING

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

2) Close engine cowling 131.

3) Remove the warning sign prohibiting "SOURCE" selector operation.

4) After application of this SB, fill in the enclosed form and return it by fax to SOCATA to the indicated address.

UPDATING OF THE AIRCRAFT DOCUMENTATION:

Upon completion of Service Bulletin No. SB 70-176-21, Amendment 1, "PULLEY DRIVE ASSEMBLY", Reference MOD70-0243-21, make an appropriate maintenance record entry.

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.

NOV 09 Page 4 / 7 Amdt. 1 - FEB 10

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TBM AIRCRAFT SERVICE BULLETIN SB 70 - 176 AMENDMENT 1 21 ATA No.

MANDATORY The technical content of this document is approved under the authority of DOA No. EASA.21J.013 is the subject of an AD 1 - Washer 10 - Nut 2 - Bolt 11 - Spacer 3 - Pulley 12 - Pulley drive assy 4 - Seal 13 - Drain tube 5 - Union 14 - Belt 6 - Nut 15 - Belt 7 - Nut 16 - Spacer 8 - Support 17 - Shaft 12 9 - Gasket 18 - Shaft 18 12

- 10 13 Figure 1 - Removal of pulley drive assy NOV 09 Page 5 / 7 Amdt. 1 - FEB 10

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TBM AIRCRAFT SERVICE BULLETIN SB 70-176 AMENDMENT 1 21 ATA No.

MANDATORY The technical content of this document is approved under the authority of DOA No. EASA.21J.013 is the subject of an AD 1 - Washer 18 - Shaft 2 - Bolt 22 - Nut 4 - Seal 23 - Support 5 - Union 24 - Pulley drive assy 9 - Gasket 25 - Spacer 13 - Drain tube 26 - Shouldered washer 17 - Shaft 27 - Laminated washer 28 - Washer 22 17 27

- 26 24 - 26 - 23

- 4 5 13 Figure 2 - Installation of pulley drive assy NOV 09 Page 6 / 7 Amdt. 1 - FEB 10

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TBM AIRCRAFT SERVICE BULLETIN SB 70-176 AMENDMENT 1 21 ATA No.

MANDATORY The technical content of this document is approved under the authority of DOA No. EASA.21J.013 is the subject of an AD 8 - Support 33 - Bolt 14 - Belt 34 - Nut 15 - Belt 35 - Nut 17 - Shaft 36 - Tension adjuster 18 - Shaft 37 - Bolt 31 - Tension adjuster 38 - Nut 32 - Washer 39 - Pulley 14243005AAAFMA4601 39 18 35 36 37 15 Figure 3 - Installation of pulley drive assy NOV 09 Page 7 / 7 Amdt. 1 - FEB 10