Bombardier SB 670BA-27-059: U.S. DOT/FAA - Service Information - SB 670BA-27-059 RB

Flight Controls − Rudder Travel Limiting System − Replacement of the Return Springs of the Rudder Travel Limiter This page transmits:

Revision B of Service Bulletin 670BA−27−059, pages 1 thru 26, dated Sep 26/2013.

The changes in this revision have no effect on aircraft that have KDGWKLV service bulletinLQFRUSRUDWHG.

Reason:

Revised Planning Information, paragraph 1., to:

Change the service bulletin effectivity.

Revised Accomplishment Instructions, paragraph 2., to:

Change a step.

Document Instructions:

Discard the copy of Service Bulletin 670BA−27−059, Revision A, dated Mar 08/2012.

Replace with the copy attached.

Service Bulletin History:

Initial issue, dated Oct 12/2011.

Revision A, dated Mar 08/2012.

SERVICE BULLETIN 670BA−27−059 S.B. 670BA−27−059 Page 1 of 1 Sep 26/2013

SERVICE BULLETIN

REVISION TRANSMITTAL SHEET SUBJECT:

Flight Controls − Rudder Travel Limiting System − Replacement of the Return Springs of the Rudder Travel Limiter

1. PLANNING INFORMATION A. Effectivity

(1) Aircraft Affected:

Part number: BA670−30000−7969, BA670−93470−9, BA670−93470−13, BA670−93470−15, BA670−93470−981, BA670−93470−987, KBA670−93470−1, KBA670−93470−3, KBA670−93402−1, KBA670−93402−3 and KBA670−93402−5, BA670−93470−963, BA670−93470−979, BA670−93470−2001, BA670−93470−7.

Installed at the time of delivery on CL−600−2C10 aircraft with serial numbers:

10002 thru 10333 Installed at the time of delivery on CL−600−2D24 and CL−600−2D15 aircraft with serial numbers:

15001 thru 15285

SERVICE BULLETIN ATA SYSTEM: 27−25 NUMBER: 670BA−27−059 S.B. 670BA−27−059 Page 1 of 26 Oct 12/2011 Revision B, Sep 26/2013 Technical Publications THIS SERVICE BULLETIN IS SENT TO EACH OPERATOR. IF THE OPERATOR HAS LEASED AIRCRAFT, THIS SERVICE BULLETIN MUST BE SENT TO THE LESSEE. IF THE OPERATOR HAS SOLD AIRCRAFT OR

TRANSFERRED SPARES IN THE LAST SIX MONTHS, THIS SERVICE BULLETIN MUST BE SENT TO THE

NEW OWNER, UNLESS CONFIRMATION WAS RECEIVED THAT BOMBARDIER COMMERCIAL AIRCRAFT DIVISION HAS INCLUDED THE NEW OPERATOR ON THE DISTRIBUTION LIST.

SUBJECT:

Spares: Examine all spare parts. If a part listed above is found, it is necessary to incorporate this service bulletin.

All CL−600−2C10, CL−600−2D15, and CL−600−2D24, aircraft If parts listed above are installed on aircraft, but were not identified at the time of delivery, on the same or on a different aircraft model, it is necessary to incorporate this service bulletin.

Production: This change will be incorporated before delivery on aircraft with 10334 and subsequent serial numbers, and15286 and subsequent serial numbers.

NOTE: It is not necessary to do Service Bulletin 670BA−27−055, Flight Controls − Rudder Travel Limiting System − Inspection of the Return Springs and the Primary Actuator of the Rudder Travel Limiter when this service bulletin is done.

NOTE: The instructions in this service bulletin are only applicable to the systems and parts installed at the time of delivery of the aircraft or as changed by Bombardier service bulletins. Before you do this bulletin, examine all Supplemental Type Certificates (STCs), Supplemental Type Approvals (STAs) or equivalent action changes to make sure this bulletin can be completed.

B. Reason

(1) Condition It is possible for the return springs of the rudder travel limiter to break because of fatigue or fouling with the casing of the Rudder Travel Limiter.

This can cause a loss of detection of an RTL mechanical disconnect.

(2) Evidence The return springs broke during an endurance test and show indications of fouling with the casing of the RTL.

(3) Objective/Benefit This service bulletin gives the procedure to remove the torsion springs and the two return springs from the RTL. It also gives the procedure to install three new return springs on the RTL. This will prevent a break of the return springs.

SERVICE BULLETIN 670BA−27−059 S.B. 670BA−27−059 Page 2 of 26 Oct 12/2011 Revision B, Sep 26/2013

C. Description A rigging pin is installed. Circuit breakers are opened. The turnbuckle autopilot−controls access door and the elevator−quadrant access door are removed. The primary actuator of the rudder travel limiter is disconnected from the limiter arm. A detailed inspection of the housing is done.

The torsion and return springs installed on the link assemblies are removed and discarded. New return springs are installed. The primary actuator of the rudder travel limiter is connected to the limiter arm. The rudder travel limiter and the limiter arm are identified.

The rigging pin is removed from the rudder travel limiter. The circuit breakers are closed. The clearance between the return springs and the primary actuator is measured.

An operational test of the rudder travel limiter is done. An operational test of the rudder−control−system is done. An operational test of the spoiler and stabilizer control−unit backup−modules is done. The turnbuckle autopilot−controls access door and the elevator−quadrant access door are installed.

D. Compliance Recommended Service Bulletin.

For aircraft that have an RTL with part number KBA670−93470−1 or BA670−93470−9 or KBA670−93470−3, or BA670−93470−981 or BA670−30000−7969 or BA670−93470−987 or BA670−93470−13 or BA670−93470−963 or BA670−93470−979 or BA670−93470−2001 or BA670−93470−7 installed and that have 15400 flight cycles or more [1], [2], [3].

Bombardier recommends that this service bulletin be done no more than 2000 flight cycles from the release date on this service bulletin, unless otherwise directed by the airworthiness authority of the operator SERVICE BULLETIN 670BA−27−059 S.B. 670BA−27−059 Page 3 of 26 Oct 12/2011 Revision B, Sep 26/2013

For aircraft that have an RTL with part number KBA670−93470−1 or BA670−93470−9 or KBA670−93470−3, or BA670−93470−981 or BA670−30000−7969 or BA670−93470−987 or BA670−93470−13 or BA670−93470−963 or BA670−93470−979 or BA670−93470−2001 or BA670−93470−7 installed and that have 5200 flight cycles or less [1], [2], [3].

Bombardier recommends that this service bulletin be done before the aircraft have 10200 flight cycles, unless otherwise directed by the airworthiness authority of the operator.

For aircraft that have an RTL with part number KBA670−93470−1 or BA670−93470−9 or KBA670−93470−3, or BA670−93470−981 or BA670−30000−7969 or BA670−93470−987 or BA670−93470−13 or BA670−93470−963 or BA670−93470−979 or BA670−93470−2001 or BA670−93470−7 installed and that have more than 5200 flight cycles but less than 15400 flight cycles [1], [2], [3].

Bombardier recommends that this service bulletin be done no more than 5000 flight cycles from the release date on this service bulletin or before the aircraft have 17400 flight cycles, whichever comes first, unless otherwise directed by the airworthiness authority of the operator.

For aircraft that have an RTL with part number KBA670−93402−1 or KBA670−93402−3 or KBA670−93402−5 or BA670−93470−15 installed.

Bombardier recommends that this service bulletin be done no more than 6000 flight cycles from the release date on this service bulletin, unless otherwise directed by the airworthiness authority of the operator.

This service bulletin does not affect Airworthiness Limitations (AWLs) or Damage Tolerance Inspections (DTIs).

For aircraft with part number BA670−93470−963 or BA670−93470−2001 NOTE: [1] Service Bulletin 670BA−27−013, Flight Controls − Rudder Travel Limiter − Introduction of a Deflector, must be done in conjunction with this service bulletin.

SERVICE BULLETIN 670BA−27−059 S.B. 670BA−27−059 Page 4 of 26 Oct 12/2011 Revision B, Sep 26/2013

For aircraft with part number BA670−93470−979 NOTE: [2] Service Bulletin 670BA−27−024, Flight Controls − Rudder Travel Limiter − Identification of the Rudder Travel Limiter Assembly, must be done in conjunction with this service bulletin.

For aircraft with part number BA670−93470−7 NOTE: [3] Service Bulletin 670BA−27−013, Flight Controls − Rudder Travel Limiter − Introduction of a Deflector or Service Bulletin 670BA−27−024, Flight Controls − Rudder Travel Limiter − Identification of the Rudder Travel Limiter Assembly, must be done in conjunction with this service bulletin.

E. Approval The technical content of this service bulletin has been approved under the authority of the TCCA Design Approval Organization No: DAO #93−Q−02.

F. Manpower The man−hours given below are an estimate for direct labor done by an experienced crew on an aircraft prepared for maintenance.

This estimate does not include the time necessary for:

− Administrative functions such as planning, liaison, familiarization, and report writing.

− Non productive elapsed time such as rest time, having meals, and crew shift changes.

− Elapsed time such as for paint to dry, sealant to cure, and fuel tank venting.

− Preparation for modification (unless specified in the accomplishment instructions) such as cleaning and getting parts, tools, consumables, and ground equipment.

− Quality assurance inspections, troubleshooting and/or correction of discrepancies found when a task is done.

− All other activities that are not considered by Bombardier as directly related to the accomplishment of this procedure.

NOTE: For on−site labor assistance, please speak with a Fleet Services representative for a quote. Contact the Fleet Services team through the CRC at 514−855−8500 or email at thd.crj@aero.bombardier.com.

SERVICE BULLETIN 670BA−27−059 S.B. 670BA−27−059 Page 5 of 26 Oct 12/2011 Revision B, Sep 26/2013

It will take an estimated 8.0 man−hours to complete this service bulletin. The man−hours are divided as shown in the table that follows:

TASK MAN−HOURS

(1) Job Set−Up 1.0

(2) Procedure 2.0

(3) Test 4.0

(4) Job Close−Out 1.0 G. Material − Price and Availability

(1) The kit in the table that follows is available from Bombardier commercial aircraft.

NOTE: For a list of the kit contents, refer to paragraph 3.A.

KIT NUMBER NAME 670BA27059K1 Rudder Travel Limiter − Return Springs

(2) Please send a purchase order to the address below to schedule the kit:

Bombardier Service Bulletin Kit Support Team 123 Garratt Blvd, N42−24 Toronto, Ontario Canada M3K 1Y5 Fax: 416−375−3060 Phone: 416−375−3920 email: sbkits@aero.bombardier.com Please contact your Service Bulletin Kit Support Team at the address above for terms and conditions.

(3) Refer to paragraph 3.B. for a list of consumables for this service bulletin.

H. Tooling − Price and Availability There are no tool kits for this service bulletin.

SERVICE BULLETIN 670BA−27−059 S.B. 670BA−27−059 Page 6 of 26 Oct 12/2011 Revision B, Sep 26/2013

(1) Refer to paragraph 3.C. for a list of special tools and equipment for this service bulletin.

I. Weight and Balance Not changed.

J. Electrical Load Data Not changed.

K. References − Restriction and/or Special Instruction (RSI), C−27−1427−00, Revision C − Modsum 670T040557, Revision A−3 − Refer to the SB Introduction for definition or explanation of Service Bulletin content.

− Aircraft Maintenance Manual (AMM) − Aircraft Illustrated Parts Catalog (AIPC) − Structural Repair Manual (SRM) − For Bombardier reference only: PCA 73983 L. Other Publications Affected None.

M. Relationship Chart PRE−SB PART NUMBER NAME POST−SB PARTNUMBER NAME E0650−069−2750S or BA670−93465−1 Spring BA670−93468−1 Spring GC415−2627−1 Pulley BA670−93466−1 Pulley SERVICE BULLETIN 670BA−27−059 S.B. 670BA−27−059 Page 7 of 26 Oct 12/2011 Revision B, Sep 26/2013

PRE−SB PART NUMBER NAME POST−SB PARTNUMBER NAME BA670−93475−1 BA670−93475−3 KBA670−93402−7 Limiter Arm KBA670−93402−21 Limiter Arm KBA670−93470−1 Rudder TravelLimiter KBA670−93402−9 Rudder TravelLimiter BA670−93470−9 Rudder TravelLimiter KBA670−93402−9 Rudder TravelLimiter KBA670−93470−3 Rudder TravelLimiter KBA670−93402−11 Rudder TravelLimiter BA670−93470−981 Rudder TravelLimiter KBA670−93402−11 Rudder TravelLimiter BA670−93470−987 Rudder TravelLimiter KBA670−93402−23 Rudder TravelLimiter BA670−30000−7969 Rudder TravelLimiter KBA670−93402−13 Rudder TravelLimiter BA670−93470−13 Rudder TravelLimiter KBA670−93402−13 Rudder TravelLimiter KBA670−93402−1 Rudder TravelLimiter KBA670−93402−15 Rudder TravelLimiter KBA670−93402−3 Rudder TravelLimiter KBA670−93402−17 Rudder TravelLimiter KBA670−93402−5 Rudder TravelLimiter KBA670−93402−19 Rudder TravelLimiter BA670−93470−15 Rudder TravelLimiter KBA670−93402−19 Rudder TravelLimiter SERVICE BULLETIN 670BA−27−059 S.B. 670BA−27−059 Page 8 of 26 Oct 12/2011 Revision B, Sep 26/2013

2. ACCOMPLISHMENT INSTRUCTIONS A. Job Set−Up

(1) Reference Information

REFERENCE DESIGNATION AMM 12−00−00−867−801 Standard Aircraft Configuration for Maintenance AMM 20−21−00−910−801 Torquing of Threaded Fasteners AMM 20−51−00−000−801 Removal of Cotter Pins AMM 20−51−00−400−801 Installation of Cotter Pins AMM 24−00−00−910−801 Electrical/Electronic Safety Precautions AMM 27−00−00−910−802 Flight−Control Safety Precautions AMM 27−21−00−710−801 Operational Test of the Rudder−Control−System AMM 27−21−00−864−801 Move the Rudder Control Surface in the Neutral Position AMM 27−25−00−710−801 Operational Check of the Rudder Travel Limiter AMM 27−25−03−000−801 Removal of the Rudder Travel Limiter Actuator AMM 27−25−03−400−801 Installation of the Rudder Travel Limiter Actuator AMM 27−25−03−820−801 Rigging Check of the Rudder Travel Limiter Actuator AMM 27−61−05−740−801 Self Test of the Spoiler and Stabilizer Control Units AMM 55−32−32−000−801 Removal of the Elevator−Quadrant Access Door (325EL/325ER) AMM 55−32−32−000−802 Removal of the Turnbuckle Autopilot−Controls Access Door (325DL) SERVICE BULLETIN 670BA−27−059 S.B. 670BA−27−059 Page 9 of 26 Oct 12/2011 Revision B, Sep 26/2013

REFERENCE DESIGNATION AMM 55−32−32−400−801 Installation of the Elevator−Quadrant Access Door (325EL/325ER) AMM 55−32−32−400−802 Installation of the Turnbuckle Autopilot−Controls Access Door (325DL) SRM 51−21−16−001−001 Finish Codes SRM 51−26−00−001−001 Cleaning SRM 51−41−02−001−001 Bolts, Screws and Related Items

(2) Make sure that the aircraft is in standard configuration for maintenance (AMM 12−00−00−867−801).

(3) Obey all the electrical/electronic safety precautions (AMM 24−00−00−910−801).

(4) Obey all the flight−control safety precautions (AMM 27−00−00−910−802).

(5) Move the rudder control surface to the neutral position (AMM 27−21−00−864−801).

(6) Open, safety, and tag the circuit breakers that follow:

CB−PANEL CB NO. NAME CBP−1 F1 SSCU 1 CH A CBP−1 F2 P FEEL 1 RTL 1 CBP−1 F11 HYD SYST AC PUMP CONT 3B CBP−1 F14 HYD SYST AC PUMP CONT 2 CBP−2 F1 SSCU 1 CH B CBP−2 F2 RUDDER TRIM CBP−2 F13 HYD SYST AC PUMP CONT 1 CBP−2 F14 HYD SYST AC PUMP CONT 3A CBP−2 LOWER R3 SSCU2 CH A SERVICE BULLETIN 670BA−27−059 S.B. 670BA−27−059 Page 10 of 26 Oct 12/2011 Revision B, Sep 26/2013

CB−PANEL CB NO. NAME CBP−2 LOWER R4 SSCU2 CH B CBP−2 LOWER R5 P FEEL 2 RTL 2

(7) Install warning placards on the rudder pedals to warn not to move the rudder control surface.

(8) Install warning placards on the control columns to warn not to operate or move the flight controls.

(9) Remove the access panels that follow:

PANEL NAME REFERENCE 325DL Turnbuckle Autopilot−Controls Access Door AMM 55−32−32−000−802 325EL Elevator−Quadrant Access Door AMM 55−32−32−000−801

(10) Install rigging pin P1 in the housing (refer to Figure 1, view A).

B. Procedure Refer to Figure 1.

(1) On the primary actuator (1), disconnect electrical connector A203P1 (2) from its mating receptacle.

(2) Install the protective covers on electrical connector A203P1 (2) and on the receptacle of the primary actuator (1).

(3) Remove the nut (3), the lock washer (4), the washer (5), and the bonding jumper (6).

(4) Remove the spring (7) from the RTL spring bracket as follows:

(a) Remove and discard the cotter pin (8).

WARNING: BE CAREFUL WHEN YOU REMOVE THE SPRING. THE

SPRING CAN HAVE LOAD AND CAUSE INJURIES TO PERSONS.

(b) Hold the pulley (9) and the spring (7).

SERVICE BULLETIN 670BA−27−059 S.B. 670BA−27−059 Page 11 of 26 Oct 12/2011 Revision B, Sep 26/2013