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SB 670BA−57−029 Page 1 of 11 Feb 02/2021
SERVICE BULLETIN Technical Publications THIS SERVICE BULLETIN IS SENT TO EACH OPERATOR. IF THE OPERATOR HAS LEASED AIRCRAFT ,
TRANSFERRED SPARES IN THE LAST SIX MONTHS, SEND THIS SERVICE BULLETIN TO THE NEW
OWNER, UNLESS CONFIRMATION WAS RECEIVED THAT MHIRJ HAS INCLUDED THE NEW OPERATOR ON THE DISTRIBUTION LIST .
SEND THIS SERVICE BULLETIN TO THE LESSEE. IF THE OPERATOR HAS SOLD AIRCRAFT OR ATA SYSTEM: 57−00 NUMBER: 670BA−57−029 SUBJECT: Wings − General − Inspection of the Wing Lower Skin in the Flaps Fitting Area
1. PLANNING INFORMATION A. Effectivity
(1) Aircraft Affected:
AIRCRAFT MODEL
SERVICE AIRCRAFT
SERIAL NUMBERS
PRODUCTION
AIRCRAFT
SERIAL NUMBERS CL−600−2D24 15462 thru 15475. [1] [1] There is no production effectivity.
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 MHIRJ service bulletins. Before you do this service bulletin, examine all Supplemental Type Certificates (STCs) and Supplemental Type Approvals (STAs) or equivalent action changes to make sure you can complete this service bulletin.
SERVICE BULLETIN 670BA−57−029 SB 670BA−57−029 Page 2 of 11 Feb 02/2021 B. Reason
(1) Condition Some aft wing lower planks were damaged during the production of the aircraft.
(2) Evidence As a result of a production manufacture process error, there may be some dents on wing lower planks.
(3) Objective/Benefit This service bulletin gives the procedure to do a one time inspection of the five flap arm areas on the left and right side wing stations (WS) 54, 129, 179, 220 and 264 for dents, cracks, discoloration and/or other surface damage.
Report all results to MHIRJ, and get an approved disposition if damage was found.
C. Description The LHS and the RHS wing flap attachment fairings are removed. The area is cleaned and the inspection is done. A result report is sent to MHIRJ. The LHS and the RHS wing flap attachment fairings are installed.
D. Compliance Recommended service bulletin.
MHIRJ recommends that this service bulletin be done at no more than 8800 flight hours from the release date of this service bulletin or, before 16,800 flight hours since Entry Into Service (EIS) of the aircraft, unless otherwise directed by the airworthiness authority of the operator.
NOTE: If it is not possible to complete all the instructions in this service bulletin because of the configuration of the aircraft, speak with a representative of MHIRJ in the CRC at 1−844−272−2720 (1−844−CRC−CRC0) or e-mail at thd.crj@MHIRJ.com for analysis and to get an approved disposition to complete this service bulletin.
This service bulletin does not affect Airworthiness Limitations (AWLs) or Damage Tolerance Inspections (DTIs).
E. Approval The technical content of this service bulletin has been approved under the authority of the TCCA Design Approval Organization No: DAO #20−Q−01.
SERVICE BULLETIN 670BA−57−029 SB 670BA−57−029 Page 3 of 11 Feb 02/2021 F . Manpower The man-hours given below are estimates for direct labor done by an experienced crew on an aircraft prepared for maintenance.
These estimates do not include the time necessary for:
−Administrative functions such as planning, liaising, 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 MHIRJ as directly related to the accomplishment of this procedure.
NOTE: For on-site labor assistance, please speak with a Fleet Services representative for an estimate. Call the Fleet Services Team through the CRC at 1−844−272−2720 (1−844−CRC−CRC0) or e-mail at thd.crj@MHIRJ.com.
It will take an estimated 4.5 man-hours to complete this service bulletin. The man-hours are divided in the table that follows (elapsed cure time is not included in the man-hour summary given above):
TASK MAN-HOURS
(1) Job Set-Up 1.00
(2) Procedure 2.00
(3) Test N/A
(4) Job Close-Out 1.50
SERVICE BULLETIN 670BA−57−029 SB 670BA−57−029 Page 4 of 11 Feb 02/2021 G. Material − Price and Availability There are no kits for this service bulletin.
(1) 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. 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 Refer to the SB Introduction document for definition or explanation of service bulletin content.
For MHIRJ reference only: Restriction and/or Special Instruction (RSI) C−57−1920−00, Revision A.
For MHIRJ reference only: PCA 77504.
L. Other Publications Affected Aircraft Maintenance Manual (AMM) Aircraft Illustrated Parts Catalogue (AIPC) M. Relationship Chart Not applicable.
SERVICE BULLETIN 670BA−57−029 SB 670BA−57−029 Page 5 of 11 Feb 02/2021
2. ACCOMPLISHMENT INSTRUCTIONS Reference Information
REFERENCE DESIGNATION AMM 12−00−00−867−801 Standard Aircraft Configuration for Maintenance AMM 57−51−84−000−801 Removal of the Flap Fairing at WS 54.55 AMM 57−51−84−400−801 Installation of the Flap Fairing at WS 54.55 AMM 57−51−84−000−802 Removal of the Flap Fairing at WS 128.00 AMM 57−51−84−400−802 Installation of the Flap Fairing at WS 128.00 AMM 57−51−84−000−803 Removal of the Flap Fairing at WS 178.00 AMM 57−51−84−400−803 Installation of the Flap Fairing at WS 178.00 AMM 57−51−84−000−804 Removal of the Flap Fairing at WS 220.00 AMM 57−51−84−400−804 Installation of the Flap Fairing at WS 220.00 AMM 57−51−84−000−805 Removal of the Flap Fairing at WS 264.00 AMM 57−51−84−400−805 Installation of the Flap Fairing at WS 264.00 SRM 51−13−01−001−001 Defect and Damage Repair Requests − Report Procedure SRM 51−26−00−001−001 Cleaning
SERVICE BULLETIN 670BA−57−029 SB 670BA−57−029 Page 6 of 11 Feb 02/2021 A. Job Set-Up NOTE: The steps in the Job Set-Up section of this service bulletin are recommended steps. The steps give a recommendation to get access to the work area. This recommendation is to give a safe work area and to minimize possible damage to surrounding aircraft parts. Alternative steps can be used at the operator discretion.
(1) Make sure that the aircraft is in standard configuration for maintenance (refer to AMM 12−00−00−867−801).
WARNING: OBEY ALL THE SAFETY PRECAUTIONS WHEN YOU DO
MAINTENANCE ON OR NEAR ELECTRICAL/ELECTRONIC EQUIPMENT. IF YOU DO NOT OBEY THE SAFETY PRECAUTIONS,
INJURIES TO PERSONS AND/OR DAMAGE TO THE EQUIPMENT CAN OCCUR.
Refer to Figure 1.
NOTE: This procedure is applicable to the left and the right sides. The procedure that follows is written for the left side. The differences are given.
(2) Remove the forward flap fairing (1) and the aft flap fairing (2) at FS 54.55 (refer to AMM 57−51−84−000−801).
(3) Remove the forward flap fairing (1) and the aft flap fairing (2) at FS 128.00 (refer to AMM 57−51−84−000−802).
(4) Remove the forward flap fairing (1) and the aft flap fairing (2) at FS 178.00 (refer to AMM 57−51−84−000−803).
(5) Remove the forward flap fairing (1) and the aft flap fairing (2) at FS 220.00 (refer to AMM 57−51−84−000−804).
(6) Remove the forward flap fairing (1) and the aft flap fairing (2) at FS 264.00 (refer to AMM 57−51−84−000−805).
SERVICE BULLETIN 670BA−57−029 SB 670BA−57−029 Page 7 of 11 Feb 02/2021 B. Procedure NOTE: This procedure is applicable to the left and the right sides. The procedure that follows is written for the left side. The differences are given.
(1) If it is not possible to complete all the instructions in this service bulletin because of the configuration of the aircraft, speak with a representative of MHIRJ in the CRC at 1−844−272−2720 (1−844−CRC−CRC0) or e-mail at thd.crj@MHIRJ.com for analysis and to get an approved disposition to complete this service bulletin.
Refer to Figures 1 and 2.
(2) Do a Detailed Visual Inspection (DVI) of the outer aft lower skin wing stations (WS) 54.55, 128.00, 179.00, 220.00 and 264.00 as follows:
(a) Inspect the area for signs of discoloration.
NOTE: Cracks in the wing skin could cause a minor fuel leak which may result in a local discoloration of the wing surface.
(b) Clean an area of 18 in. (46 cm) around each of the forward flap fittings
(3) and aft flap fittings (4) locations (SRM 51−26−00−001−001).
(c) Use a bright flashlight and a 12 in. (30 cm) straight edge to inspect that area as follows:
1 Place the straight edge on the skin surface in an upright position.
2 Use the bright light to visually inspect the area for dents, cracks, gouges, scratches and/or other surface damage.
(d) After the inspection, make a defect and damage report of all findings and e−mail it to MHIRJ at thd.crj@MHIRJ.com (refer to SRM 51−13−01−001−001).
NOTE: The defect and damage report must be sent to MHIRJ if dents, cracks, discoloration, and/or other surface damage was found or not.
1 If no damage is found, then no further action is required and the aircraft can be returned to service.
2 If damage is found, get an approved disposition from MHIRJ before the aircraft can be returned to service.
SERVICE BULLETIN 670BA−57−029 SB 670BA−57−029 Page 8 of 11 Feb 02/2021 C. Job Close-Out NOTE: The steps in the Job Close-Out section of this service bulletin, except for the return-to-service tests, are recommended steps. The steps give a recommendation to install components removed during the Job Set-Up.
This recommendation is to make sure that the aircraft is safe and ready to return to service. Alternative steps can be used at the operator discretion.
(1) Remove all tools, equipment, and unwanted materials from the work area.
Refer to Figure 1.
NOTE: This procedure is applicable to the left and the right sides. The procedure that follows is written for the left side. The differences are given.
(2) Install the forward flap fairing (1) and the aft flap fairing (2) at FS 54.55 (refer to AMM 57−51−84−400−801).
(3) Install the forward flap fairing (1) and the aft flap fairing (2) at FS 128.00 (refer to AMM 57−51−84−400−802).
(4) Install the forward flap fairing (1) and the aft flap fairing (2) at FS 178.00 (refer to AMM 57−51−84−400−803).
(5) Install the forward flap fairing (1) and the aft flap fairing (2) at FS 220.00 (refer to AMM 57−51−84−400−804).
(6) Install the forward flap fairing (1) and the aft flap fairing (2) at FS 264.00 (refer to AMM 57−51−84−400−805).
(7) When this service bulletin is completed, make this entry in the applicable logbooks: /quoteblleftService Bulletin 670BA−57−029, Inspection of the Wing Box Structure on the AFT Lower Wing Plank, incorporated."
SERVICE BULLETIN 670BA−57−029 SB 670BA−57−029 Page 9 of 11 Feb 02/2021 Removal and Installation of the Forward and AFT Flap Fitting Fairings Figure 1 WS54.55 WS128.00 WS178.00 WS220.00 WS264.00 A 2 1
TYPICAL A bc11023a02.cgm, gd, gb, jan07/2021 LEGEND
1. Forward fairing.
2. Aft fairing.
3. Flap − Wing Forward Fitting.
4. Flap − Wing Aft Fitting.
3 4
SERVICE BULLETIN 670BA−57−029 SB 670BA−57−029 Page 10 of 11 Feb 02/2021 Outer Aft lower skin Inspection Area Figure 2 bc11023a01.cgm, gd, dec08/2020 WS54.55 WS128.00 WS178.00 WS220.00 WS264.00 1 NOTE Inspect area 18 in. (46 cm) around the forward and aft flap fitting (shown in gray shade).
SERVICE BULLETIN 670BA−57−029 SB 670BA−57−029 Page 11 of 11 Feb 02/2021
3. MATERIAL INFORMATION A. Kit Information None.
B. Consumable Information For a list of consumables, refer to the different tasks that are given as references in this service bulletin.
C. Special Tools and Equipment There are no special tools and equipment for this service bulletin.
D. Disposition of Parts Not applicable.
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