Boeing ASB 737-27A1277: U.S. DOT/FAA - Service Bulletin (2), text

Text

From the PDF’s text layer: layout, tables and figures are lost. The PDF is the document.

Query with SQL

duckdb -csv -c "SELECT p.page, p.text_source, p.text, f.rights_holder, f.license
  FROM 'https://openairdocs.org/data/latest/service_document_file_page.parquet' p JOIN 'https://openairdocs.org/data/latest/service_document_file.parquet' f USING (file_sha256)
  WHERE p.file_sha256 = '41b53203f616f515e1b8f5fec08ea8cf03fd48509ec9040a1d985a7ad9e7f5c3'
  ORDER BY p.page"

Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.

SELECT p.page, p.text_source, p.text, f.rights_holder, f.license
FROM 'https://openairdocs.org/data/latest/service_document_file_page.parquet' p JOIN 'https://openairdocs.org/data/latest/service_document_file.parquet' f USING (file_sha256)
WHERE p.file_sha256 = '41b53203f616f515e1b8f5fec08ea8cf03fd48509ec9040a1d985a7ad9e7f5c3'
ORDER BY p.page

Run it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.

Page 1Open in PDF

ALERT ALERT Commercial Airplane Group 737

ALERTALERT Service Bulletin Number: 737-27A1277 Date: July 21, 2005 Revision 2: January 08, 2010 ATA System: 2741 SUBJECT: FLIGHT CONTROLS - Horizontal Stabilizer Trim Control System - Ballscrew and Ball Nut Inspection , Lubrication, and Repair/Overhaul

BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2005 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter. Boeing also claims copyright in this document as a compilation and/or collective work.

This document includes proprietary information owned by The Boeing Company and/or one or more third parties. Treatment of the document and the information it contains is governed by contract with Boeing. For more information, contact The Boeing Company, P.O. Box 3707, Seattle, Washington 98124.

Boeing, 707, 717, 727, 737, 747, 757, 767, 777, BBJ, BOEING BUSINESS JET, DC-8, DC-9, DC-10, MD-10, MD-11, MD-80, MD-90, the Boeing logo and the Boeing livery are among the trademarks owned by Boeing or its subsidiaries. No intellectual property license (express or implied) is granted in connection with this document or otherwise.

Page 2Open in PDF

ALERT ALERT

BLANK PAGE

Page 3Open in PDF

ALERT ALERT

Table of Contents Revision Transmittal Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1. PLANNING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 A. Effectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

1. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 E. Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

2. Data supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . 43

3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . 44 K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44 L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . 44

2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 A. Material - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 C. Parts Necessary For Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

1. Kits/Parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

2. Parts and Materials Supplied by the Operator: . . . . . . . . . . . . . . . . . . . . . . 45

3. Parts Modified and Reidentified: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

4. Parts Removed and Not Replaced: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 E. Special Tooling - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . 46

3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 FIGURE 1: HORIZONTAL STABILIZER TRIM ACTUATOR - DETAILED INSPECTION OF THE BALLSCREW, BALL NUT, AND THE ATTACHMENT FITTINGS . . . . . . . . . . . . 54 FIGURE 2: LUBRICATION OF THE HORIZONTAL STABILIZER TRIM ACTUATOR . . . . . . . . . 60 FIGURE 3: HORIZONTAL STABILIZER TRIM ACTUATOR BALLSCREW AND BALL NUT - REPAIR/ REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 APPENDIX A: Inspection report form for SB 737-27A1277 . . . . . . . . . . . . . . . . . . . . . . . 64

Page 4Open in PDF

ALERT ALERT

BLANK PAGE

Page 5Open in PDF

ALERT ALERT Commercial Airplanes 737

ALERTALERT Service Bulletin Number: 737-27A1277 Revision Transmittal Sheet Original Issue: July 21, 2005 Revision 2: January 08, 2010 ATA System: 2741 SUBJECT: FLIGHT CONTROLS - Horizontal Stabilizer Trim Control System - Ballscrew and Ball Nut Inspection , Lubrication, and Repair/Overhaul This Revision includes all pages of the service bulletin.

COMPLIANCE INFORMATION RELATED TO THIS REVISION 737-900ER airplanes were added to Group 2 of this service bulletin effectivity.

No more work is necessary on airplanes changed as shown in the original issue of this service bulletin dated July 21, 2005, or Revision 1 of this service bulletin dated July 25, 2007 (airplanes that incorporated UNMBRA CUSCINETTI, S.p.A. service bulletin 07322-27-01). However, Operators have to continue to do the repeat Detailed Inspection, Lubrication, and Overhaul as given in Paragraph 1.E., Compliance, Table 1.

NOTE: The Operators that performed the initial Detailed Inspection, Lubrication, and Overhaul do not have to do another initial inspection, but have to continue to do the repeat Detailed Inspection, Lubrication, and Overhaul of the Horizontal Stabilizer Trim Actuator as given in paragraph 1.E, Compliance, Table 1.

The Operators that incorporated UMBRA CUSCINETTI, S.p.A service bulletin 07322-27-01 as given in WORK PACKAGE 2, have to continue to do the repeat Detailed Inspection, Lubrication, and Overhaul of the Horizontal Stabilizer Trim Actuator as given in paragraph 1.E, Compliance, Table 1.

The Operators that did not incorporate UMBRA CUSCINETTI S.p.A. service bulletin, have to incorporate UNMBRA CUSCINETTI, S.p.A. service bulletin 07322-27-01 as given in WORK PACKAGE 2, and have to continue to do the repeat Detailed Inspection, Lubrication, and Overhaul of the Horizontal Stabilizer Trim Actuator as given in paragraph 1.E, Compliance, Table 1.

REASON FOR REVISION This revision is sent to tell the operators that 737-900 ER airplanes have been added to Group 2 of the service bulletin effectivity. Also, this revision is sent to inform the Operators that the Warranty statement has been changed.

Paragraph 1.A., Effectivity, shows changes of airplane operators. Each operator should examine the Effectivity paragraph for changes.

These following sections of the service bulletin are changed:

Page 6Open in PDF

ALERT ALERT

1. Changed throughout the bulletin the term "as given in" with the term "in accordance with".

2. In Summary Page, Action Paragraph - Added additional data for clarification.

3. Revised note (a) of Table 1, and added note (b) to Table 1.

4. In Summary Page, Effectivity Paragraph - Added 737-900 ER airplanes

5. Planning Information, Paragraph 1.A., Effectivity - Added 737-900 ER airplanes.

6. Planning Information, Paragraph 1.C., Reason - Added the list of all important changes done to the service bulletin.

7. Planning Information, Paragraph 1.D., Description - Added the work statement for Revision 2.

8. Revised note (a) of Table 1, and added note (b) to Table 1.

9. Material Information, Paragraph 2.B., Industry Support Information - Changed the Warranty information.

10. Accomplishment Instructions, Paragraph 3.A., General Information - Changed Note 7 to replace the term "as given in" with the term "in accordance with".

11. Accomplishment Instructions, Paragraph 3.B., Work Instructions - Added some clarification notes and more data to some step instructions, deleted some unnecessary step instructions.

12. Accomplishment Instructions, Paragraph 3.B. - Changed Figure 1, Figure 2, and Figure 3 for clarification.

Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity, to show the location of important changes.

Pages with no vertical lines have no important changes.

REVISION HISTORY Original Issue: July 21, 2005 Revision 1: July 25, 2007 Revision 2: January 8, 2010

Page 7Open in PDF

ALERT ALERT Commercial Airplane Group 737

ALERTALERT Service Bulletin Number: 737-27A1277 Summary Date: July 21, 2005 Revision 2: January 08, 2010 ATA System: 2741 SUBJECT: FLIGHT CONTROLS - Horizontal Stabilizer Trim Control System - Ballscrew and Ball Nut Inspection , Lubrication, and Repair/Overhaul

THIS BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER.

CONCURRENT REQUIREMENTS None.

BACKGROUND This service bulletin is issued to maintain the frequency of the detailed inspection of the Horizontal Stabilizer Trim Actuator Ballscrew and Ball Nut as specified in the Maintenance Planning Document. This service bulletin also gives instructions to remove/replace and repair the Horizontal Stabilizer Trim Actuator if a damaged Ballscrew or Ball Nut is found. This service bulletin also adds the recommended intervals for repeat lubrication and overhaul. The airplanes effective for this service bulletin are divided in two groups, Group 1 and Group 2.

The detailed inspection, overhaul, and lubrication tasks are required for Group 1 and Group 2 airplanes. Also, for Group 1 airplanes only, this service bulletin gives recommended compliance time for incorporation of supplier UMBRA CUSCINETTI, S.p.A. service bulletin 07322-27-01, Rev 00, dated December 21, 2004. The supplier service bulletin 07322-27-01 provides instructions to remove and replace the Ball Nut Tube Retainers on the 737 Horizontal Stabilizer Trim Actuator Ballscrew assembly with new Tube Retainers that have sufficient stiffness to retain the load carrying balls in all known failure mode conditions. The changes given in this bulletin will reduce the probability of loss of the primary and secondary load paths of the Stabilizer Trim Actuator. Loss of primary and secondary load paths of the Stabilizer Trim Actuator could result in the loss of control of the airplane.

After a Horizontal Stabilizer Jackscrew incident related to a MD-80 airplane, Boeing initiated a design review of the Boeing heritage horizontal stabilizer ballscrew primary and secondary load paths. During this review, one 757 operator reported a Horizontal Stabilizer Ballscrew with extensive corrosion. An investigation was initiated.

This investigation identified that a maintenance procedure to check the stabilizer Ballscrew primary load path was required. In addition, the design review found that the Ball Nut Tube Retainers on the 737 Horizontal Stabilizer Trim Actuator should be stiffened, so that the balls are retained within the assembly when the balls are jammed and not free to circulate.

Page 8Open in PDF

ALERT ALERT

Boeing Service Related Problem (SRP) 737NG-SRP-27-0153 is related to this bulletin.

ACTION (PRR 38275-74S) Get access to the Horizontal Stabilizer Trim Actuator and do the procedures that follow below at the intervals shown in the compliance section.

1. INSPECTION:

– Do a detailed inspection of the Stabilizer Trim Actuator lower and upper Gimbal for cracks and other damage. Inspect the areas around the bushings. Do a general visual inspection to see if large amount of grease exit the Ball Nut. Do a detailed inspection of the grease on and around the Ballscrew and Ball Nut for existence of metallic particles or other solid particles or corrosion products in the grease.

Do a general visual inspection of the external areas of the Stabilizer Trim Actuator, and the areas below the Stabilizer Trim Actuator, for loose ball bearings. Clean the actuator Ballscrew. Do a detailed inspection of the Ball Nut Tube Retainers for deformation, corrosion, and lifted or damaged Return Tubes. Do a detailed inspection of the actuator Ballscrew threads for cross threading, distortion, stripping, metallic particles, pitting, gouging, corrosion, spalling, brinelling, cracks, worn areas, and differences in thread shape (between thread grooves in the lower, middle, and upper portion of the Ballscrew). Move the Horizontal Stabilizer to a different setting to get access to the Ballscrew area covered by the Ball Nut. Repeat the inspections for the new exposed area of the ballscrew. Replace the Stabilizer Trim Actuator before further flight if any of these conditions exist. Lubricate the actuator Ball Nut and Ballscrew.

– Do the Detailed Inspection at the intervals given in Paragraph 1.E, Compliance, Table 1.

LUBRICATE THE STABILIZER TRIM ACTUATOR:

– Lubricate the Stabilizer Trim Actuator Ballscrew, Ball Nut, and the upper and lower Gimbals.

– Do the Lubrication at the intervals given in Paragraph 1.E, Compliance, Table 1.

REMOVE/REPLACE THE STABILIZER TRIM ACTUATOR: Replace the Stabilizer Trim Actuator if damage is found.

NOTE: If you replace a damaged Stabilizer Trim Actuator with a serviceable Stabilizer Trim Actuator that is not new or not overhauled, then you must do the Detailed Inspection for the replacement Stabilizer Trim Actuator as given in this service bulletin, and the Horizontal Stabilizer Gearbox Backlash Inspection in accordance with 737-600/700/800/900 AMM 27-41-81.

2. INCORPORATE UMBRA CUSCINETTI, S.p.A. SERVICE BULLETIN 07322-27-01, Rev 00, Dated December 21, 2004: Install the new Ball Nut Tube Retainers in accordance with supplier UMBRA CUSCINETTI, S.p.A. service bulletin 07322-27-01.

NOTE: Incorporate the UMBRA CUSCINETTI, S.p.A. service bulletin 07322-27-01 no later than the time given in Paragraph 1.E, Compliance, Table 2.

3. REMOVE AND REPAIR/OVERHAUL THE HORIZONTAL STABILIZER TRIM ACTUATOR:

– Remove the Horizontal Stabilizer Trim Actuator and repair/overhaul at the intervals given in Paragraph

1.E, Compliance, Table 1.

EFFECTIVITY All 737-600/-700/700C/-800/-900/-900ER airplanes, divided in two groups. See Service Bulletin Paragraph

1.A.1 for effectivity.

Page 9Open in PDF

ALERT ALERT

COMPLIANCE Refer to Paragraph 1.E for Compliance.

INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are available for WORK PACKAGE 2, Group 1, 737 airplanes in warranty as of June 14, 2001. Please refer to Paragraph 2.B., Industry Support Information.

MANPOWER Refer to Paragraph 1.G, Manpower.

MATERIAL INFORMATION None.

Page 10Open in PDF

ALERT ALERT

ASSEMBLY AT SPECIFIED INTERVALS.

REPAIR/OVERHAUL THE STABILIZER TRIM ACTUATOR SERVICE BULLETIN 07322-27-01.

INCORPORATE UMBRA CUSCINETTI INC. SUPPLIER ACTUATOR IF DAMAGE IS FOUND.

REMOVE/REPLACE THE HORIZONTAL STABILIZER TRIM AT SPECIFIED INTERVALS .

LUBRICATE THE STABILIZER TRIM ACTUATOR ASSEMBLY NUT, AND THE ATTACHMENT FITTINGS.

OF THE STABILIZER TRIM ACTUATOR BALLSCREW, BALL

DO A DETAILED INSPECTION AT SPECIFIED INTERVALS

HORIZONTAL STABILIZER TRIM ACTUATOR ASSEMBLY.

D34249

Page 11Open in PDF

ALERT ALERT Commercial Airplane Group 737

1. PLANNING INFORMATION A. Effectivity

1. Airplanes Refer to Service Bulletin Index Document D6-19567 Part 3 for Airplane Variable Number, Line Number, and Serial Number data.

Refer to PRR 38275-74S for data about this change.

This service bulletin is for the airplanes shown below.

The list below is not complete, and does not include all 737-600/-700/-700C/-800/-900/-900ER airplanes delivered after May, 2006.

Airplane models:

GROUP CONFIGURATION DESCRIPTION 1 - Airplanes line numbers 1 through 1713, and airplane line number 1715. These airplanes did not have the stiffened Ball Nut Tube Retainers installed.

2 - Airplane line number 1714 and airplanes line numbers 1716 and on. These airplanes had the stiffened Ball Nut Tube Retainers installed in production.

Page 12Open in PDF

ALERT ALERT

737-600 737-700 737-700C 737-800 737-900 737-900ER

IDENTIFICATION BY CUSTOMER, CUSTOMER CODE, GROUP AND VARIABLE NUMBER

AEROMEXICO (AMX) 1 YB207 YB851–YB859 YB861–YB863 YB871–YB873 2 YB860 YB874 YK580–YK585 YM501–YM515

AIR ALGERIE (ALG) 1 YD101–YD107 YE301–YE305 2 YD108–YD110

AIR BERLIN (BER) 1 YA356–YA357 YA614–YA615 YB201 YB203 YB911 YC051–YC070 YC151 YC391 YC461 YC701 YC703 YC705 YC730 YD151–YD159 YD218 YD261 2 YL023–YL024 YL951–YL954 YN231–YN235

AIR CHINA (BEJ) 1 YA681–YA682 YB584–YB586 YC943–YC951 YC981–YC983 2 YB587–YB588 YB592–YB598 YF001–YF002 YK161–YK165 YK651–YK660 YL001–YL005 YL901–YL910 YL921

AIR CHINA CHONGQING BRANCH (CHO) 1 YC941–YC942 2 YB589

AIR CHINA SOUTHWEST BRANCH (XIN) 1 YC426–YC428 YE201–YE206

AIR CHINA TIANJIN BRANCH (TJA) 1 YB581–YB583

AIR EUROPA (ARE) 1 YC761–YC770 YD046–YD049 YD206–YD209 YK002–YK003 YK361–YK364 YK601 2 YK365–YK367 YK370–YK372 YK602

AIR INDIA EXPRESS (IDC) 1 YJ942–YJ943 YK007 2 YK151–YK154 YL461–YL475

AIR NATIONAL GUARD (USK) 1 YG044 YG067 YG069

AIR NIPPON (ANK) 2 YF051–YF054 YG251–YG252 YN001–YN015

AIR PACIFIC (APC) 1 YA291 YC931–YC932

Pages 13–24 of 64