June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 1 of 38 

### Commercial **Airplane Group**  

# 767 Service Bulletin

**Number: 767-27-0186** Date: June 25, 2007 ATA System: 2731 **SUBJECT:** FLIGHT CONTROLS - Elevator - Elevator Power Control Actuator Bellcrank Replacement 

## BOEING PROPRIETARY, CONFIDENTIAL, AND/OR TRADE SECRET Copyright © 2007 The Boeing Company Unpublished Work - All Rights Reserved Boeing claims copyright in each page of this document only to the extent that the page contains copyrightable subject matter.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, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, BBJ, DC-8, DC-9, DC-10, MD-10, MD-11, MD-80, MD-88, MD-90, and the red-white-and-blue Boeing livery are all trademarks owned by The Boeing Company; and no trademark license is granted in connection with this document unless provided in writing by Boeing.**BLANK PAGE** June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 2 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

BLANK PAGE**Table of Contents** June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 3 of 38 

### BOEING SERVICE BU **LLETIN 767-27-0186**

**Table of Contents** Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1. PLANNING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 A. Effectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 1. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 E. Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2. Data supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . 23 3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . 23 K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . 24 2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 A. Material - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 C. Parts Necessary For Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 1. Kits/Parts: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 2. Parts and Materials Supplied by the Operator: . . . . . . . . . . . . . . . . . . . . . . 26 3. Parts Modified and Reidentified: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 4. Parts Removed and Not Replaced: . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 E. Special Tooling - Price and Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . 27 3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 FIGURE 1: Left Elevator PCA Bellcrank Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 FIGURE 2: Right Elevator PCA Bellcrank Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . 34 FIGURE 3: PCA Bellcrank Rework . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36**Table of Contents** June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 4 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

BLANK PAGEJune 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 5 of 38 

### Commercial **Airplane Group**  

# 767 Service Bulletin

**Number: 767-27-0186** 

### Summary Date: June 25, 2007 ATA System: 2731 **SUBJECT:** FLIGHT CONTROLS - Elevator - Elevator Power Control Actuator Bellcrank Replacement

**CONCURRENT REQUIREMENTS**

None.

**BACKGROUND** This service bulletin gives instructions to replace or rework elevator Power Control Actuator (PCA) bellcranks. As an alternative to Boeing Alert Service Bulletin 767-27A0168, the incorporation of this service bulletin combined with the repetitive check of the elevator PCA input rod assemblies recommended in Boeing Service Bulletin 767-27-0200 and the repetitive check of the elevator PCA rigging recommended in Boeing Service Bulletin 767-27-0202 will prevent continued operation with yielded or failed shear rivets in a bellcrank assembly for the elevator PCA and will also allow for longer inspection intervals. Operators are currently required by the Federal Aviation Administration (FAA) Airworthiness Directive (AD) 2001-04-09 to do the 400 flight-hour repetitive check recommended in Boeing Alert Service Bulletin 767-27A0168. One operator reported the left elevator drooping during a preflight check. Examination of the elevator control system found sheared rivets in the left-inboard and center PCA bellcrank assemblies. The elevator single hydraulic system check required by a Certification Maintenance Requirement (CMR) may not detect yielded or failed shear rivets in the bellcrank assemblies for the elevator PCA. As a result, the FAA issued AD 2000-17-05 to mandate the accomplishment of the actions specified in Boeing Alert Service Bulletin 767-27A0166, dated August 17, 2000. Since the issuance of AD 2000-17-05, the FAA has received reports that several 767-200, 767-300, and 767- 300F airplanes failed the one-time functional check of the shear rivets required by the AD. As a result, the FAA issued AD 2001-04-09 to mandate the accomplishment of the actions specified in Boeing Alert Service Bulletin 767-27A0168, dated November 21, 2000. A detailed design review found that the override device incorporated into the elevator PCA input rod assembly provides protection against malfunctions and non-normal PCA operation. This design review also found that the shear rivets are not needed. The incorporation of this service bulletin combined with the repetitive check of the elevator PCA input rod assemblies recommended in Boeing Service Bulletin 767-27-0200 and the repetitive check of the elevator PCA rigging recommended in Boeing Service Bulletin 767-27-0202 is an alternative to the 400 flight-hour repetitive check recommended in Boeing Alert Service Bulletin 767-27A0168. Boeing Service Related Problem (SRP) 767-SRP-27-0128 is related to this service bulletin.June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 6 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

**ACTION** (PRR B12901-35S) Do a general visual inspection for the three PCA bellcranks assemblies on each elevator. If a bellcrank assembly has shear rivets, replace it with a solid one-piece bellcrank assembly or rework the bellcrank assembly. Do a pogo check for each elevator PCA input rod assembly. Do a mis-rig check for each elevator.

**EFFECTIVITY** 767-200, -300, and -300F Airplanes. Refer to Paragraph 1.A.1 Airplanes, for the list of affected airplanes.

**COMPLIANCE** Boeing recommends the instructions in this service bulletin be done within six years after the date on this service bulletin. The FAA will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory.

**INDUSTRY SUPPORT INFORMATION** Boeing warranty remedies are not available for the configuration changes given in this service bulletin.

**MANPOWER**

**MATERIAL INFORMATION** Operator Supplied Parts/Materials. Refer to Paragraph 2.A., Material - Price and Availability. **Total Task Hours Elapsed Hours** 29.0 18.0June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 7 of 38 

### BOEING SERVICE BU **LLETIN 767-27-0186**

PLATE INDEX

ASSEMBLY THE BELLCRANK REPLACE OR REWORK

SHOWN DISASSEMBLED FOR CLARITY

BELLCRANK ASSEMBLY (TYPICAL) 

### ELEVATOR PCAS (LEFT SIDE SHOWN)

LEFT SIDE SHOWN ELEVATOR

EDGE TRAILING DO A POGO CHECK (6 LOCATIONS)

DO A MIS-RIG CHECK (2 LOCATIONS)

FWD



### A FWD SEE A

SEE A

SEE A SEE B



### BW34844June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 8 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

BLANK PAGEJune 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 9 of 38 

### Commercial **Airplane Group**  

# 767 Service Bulletin

**Number: 767-27-0186** Date: June 25, 2007 ATA System: 2731 **SUBJECT:** FLIGHT CONTROLS - Elevator - Elevator Power Control Actuator Bellcrank Replacement

**1. PLANNING INFORMATION A. Effectivity**  1. Airplanes Refer to Service Bulletin Index Document D624T001 Part 3 for Airplane Variable Number, Line Number, and Serial Number data. This service bulletin is for the airplanes shown below. An equivalent change is on subsequent production airplanes. Refer to PRR B12901-35S for data about this change.

Airplane models:

767-200 767-300 767-300F IDENTIFICATION BY CUSTOMER, CUSTOMER CODE, GROUP AND VARIABLE NUMBER AA 767 LLC (SVX) 1 VE067 ABX AIR (ABX) 1 VA301 VA304–VA305 VA309–VA313 VA315 VA803 VA807–VA809 VB101–VB123 VB125 VB302 AEROFLOT (ARO) 1 VL896–VL897 VN471–VN472 VS216–VS217 VS321–VS324 VS392 AEROMEXICO (AMX) 1 VF071 VF093 VF162 VS211 **GROUP CONFIGURATION DESCRIPTION** 1 - 767 -200, -300 and -300F airplanes line numbers 1-901.June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 10 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

AEROSVIT (UKA) 1 VN155 VN157 AEROTURBINE (AUB) 1 VB051 VB054–VB055 VB321–VB322 AIR ALGERIE (ALG) 1 VK131–VK133 AIR ASTANA (AKZ) 1 VL899 AIR CANADA (ACN) 1 VA701–VA709 VA711–VA719 VB001–VB002 VB201–VB202 VN051–VN054 VN056–VN062 VN531 VN536 VN541–VN542 VN546–VN547 VN751–VN752 VN811–VN812 VN931–VN936 VS381–VS382 VS546–VS549 AIR CHINA (BEJ) 1 VE064 VE083–VE086 VK161–VK164 VN388 VS206 VS208 VS274 VS307 AIR DO (HIA) 1 VS176–VS177 AIR EUROPA (ARE) 1 VN638 VS291–VS293 AIR ITALY (RIT) 1 VL913 AIR MADAGASCAR (MAD) 1 VN167 VN731 AIR NEW ZEALAND (ANZ) 1 VN653 VN655–VN658 VS113 AIR NIUGINI (NIU) 1 VN651 AIR PACIFIC (APC) 1 VN676 AIR SAHARA (SAQ) 1 VN495 AIR SEYCHELLES (ASY) 1 VL941 VS526 AIR TRANSPORT INTERNATIONAL (TIN) 1 VA509–VA513June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 11 of 38 

### BOEING SERVICE BU **LLETIN 767-27-0186**

AIR ZIMBABWE (ZMB) 1 VF061–VF062 ALITALIA (ALI) 1 VL701–VL702 VN422–VN427 VN732 VN813 VS366–VS367 VS401 ALL NIPPON AIRWAYS (ANA) 1 VK081–VK113 VN191–VN198 VR401 VS721–VS728 VT501 AMERICAN AIRLINES (AAL) 1 VA501–VA508 VA514–VA525 VA527–VA530 VN001–VN041 VS196–VS203 VS751–VS753 ARKEFLY (HXL) 1 VN156 VN164–VN165 VN225 ASIANA AIRLINES (AAR) 1 VK143–VK148 VR426 VW851 AUSTRALIAN AIRLINES (AUF) 1 VN089–VN092 VS486 AUSTRIAN (AUL) 1 VN242–VN243 VN671 VS301–VS303 AVIANCA (AVI) 1 VE171–VE172 VF072 VF092 VF161 VN152 VN532 AWAS (AWW) 1 VB325 BELAIR AIRLINES (BLB) 1 VL932 BELLVIEW AIRLINES (BEB) 1 VE125–VE126 BLUE CITY HOLDING (BCY) 1 VE069 BLUE PANORAMA AIRLINES (BPA) 1 VL911 VN174 VN681 VS061 BOEING (TBC) 1 VA001 BRA TRANSPORTES AEREOS (BRW) 1 VA806 VN376June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 12 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

BRAVO AIRLINES (BVA) 1 VE104 BRITISH AIRWAYS (BAB) 1 VN111–VN114 VN118–VN122 VN124–VN127 VN133–VN137 VS246–VS248 CAMEROON AIRLINES (CAM) 1 VA801 VS308 CHINA EASTERN YUNNAN AIRLINES (YUN) 1 VL871–VL873 CONDOR (CDF) 1 VN683–VN691 CONTINENTAL AIRLINES (CAL) 1 VR051–VR060 DELTA AIR LINES (DAL) 1 VA302–VA303 VA306 VA314 VK035–VK056 VL753 VN251–VN276 VN301–VN306 VR471–VR472 VS066–VS070 VS073–VS078 VS266–VS273 VS466–VS472 EDREES AVIATION (SME) 1 VA804 EL AL ISRAEL AIRLINES (ELA) 1 VB281–VB284 VF101–VF102 VN537 VN682 VN972 ERITREAN AIR LINES (ERJ) 1 VE066 ETHIOPIAN AIRLINES (ETH) 1 VE002 VL898 VS306 VS506–VS507 ETIHAD AIRWAYS (ETI) 1 VS391 EUROATLANTIC AIRWAYS (MAE) 1 VN151 VN551 VN561–VN562 EVERGREEN AIR CENTER (EAC) 1 VE061 EXCEL AIRWAYS (SBE) 1 VB326–VB327 VL011 VN153 VN557 FIRST CHOICE AIRWAYS (ATZ) 1 VL751–VL752 VL754 VN791–VN792 VN921June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 13 of 38 

### BOEING SERVICE BU **LLETIN 767-27-0186**

FLYGLOBESPAN.COM (FGS) 1 VN654 VS112 FLYJET LIMITED (FJE) 1 VE117 GABON AIRLINES (GBO) 1 VA017–VA018 GE CAPITAL CORPORATION (GEF) 1 VE123 GULF AIR (GUL) 1 VL004–VL006 VN307–VN310 VN313–VN314 HAINAN AIRLINES (HNA) 1 VS426–VS428 VS496–VS497 HAWAIIAN AIRLINES (HWI) 1 VK031–VK034 VN171–VN173 VN381 VS309–VS311 VS821–VS824 VS841–VS843 HEWA BORA AIRWAYS (EXD) 1 VE021 ICELANDAIR (ICE) 1 VN158 VN163 VN211 ITOCHU CORPORATION (CIT) 1 VF181–VF184 JAL INTERNATIONAL (JAL) 1 VB371–VB373 VK001–VK016 VK021–VK022 VK181 VK186 VR441 VR461 VS701–VS703 KALAIR (BERMUDA) (KLB) 1 VN311 KENYA AIRWAYS (KEN) 1 VK141 VL003 VN421 VS331–VS333 KLM - ROYAL DUTCH AIRLINES (KLM) 1 VL900 VS136 KRASAIR (ZXD) 1 VE001 VE022–VE023 VF051 LAN AIRLINES (LAN) 1 VL703 VN063–VN064 VN166 VN168 VN753 VN966–VN971 VR251 VR256–VR260 VS111 VS131–VS133June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 14 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

LOT POLISH AIRLINES (LOT) 1 VF041–VF042 VN233 VN291–VN293 VN652 MALEV HUNGARIAN AIRLINES (HGA) 1 VF171–VF172 MARTINAIR HOLLAND (MTH) 1 VN221–VN224 VN385 VN672 MAXJET AIRWAYS (SLQ) 1 VB301 VE041 VE063 VF001–VF002 MEXICANA (CMA) 1 VL001–VL002 VN154 MID EAST JET (SKL) 1 VF251 MYTRAVEL AIRWAYS (GUE) 1 VN951–VN953 NATIONWIDE AIRLINES (NWR) 1 VN556 NEOS (NEO) 1 VL892 VL894 NORTH AMERICAN AIRLINES (NNA) 1 VL755 VL895 VN922 VS316 OCEANAIR AIRLINES (OAL) 1 VN500 PACE AIRLINES (PIE) 1 VB053 PHOENIX AIRCRAFT LEASING, INC. (PLB) 1 VA810 PLUNA (PLU) 1 VN436 PRIVATAIR (PTS) 1 VS137 QANTAS (QAN) 1 VN081–VN088 VN093–VN099 VN115–VN117 VN123 VN130–VN132 VS186–VS187 ROYAL AIR MAROC (RAM) 1 VN636 VS336–VS337June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 15 of 38 

### BOEING SERVICE BU **LLETIN 767-27-0186**

ROYAL BRUNEI AIRLINES (RBA) 1 VN372 VN382–VN384 VN386–VN387 SALAMIS AVIATION (LMV) 1 VE068 SHANGHAI AIRLINES (SHA) 1 VK171 VR421–VR423 VS207 SKYMARK AIRLINES (SKM) 1 VN637 VS231 VS261–VS263 SKYSTAR (SYW) 1 VA012 STAR AIR (SBJ) 1 VA307–VA308 VB323 VB328 VB441–VB444 VE101–VE103 STATE AIR COMPANY "BERKUT" (ORE) 1 VR081 TAA (TNL) 1 VA002–VA003 VA006 VA009–VA011 VA014–VA015 VA019–VA020 TAMPA CARGO (TMP) 1 VE121–VE122 VE124 TEEBAH AIRLINES (EBH) 1 VA710 THE SULTAN'S FLIGHT (BWN) 1 VF180 THOMSONFLY (BRI) 1 VB329–VB332 VL912 VL914 VS051–VS056 TRANSAERO AIRLINES (TRX) 1 VE116 VE118 VE143 VN371 VN631–VN633 TUI AIRLINES BELGIUM (TLB) 1 VN234 UK INTERNATIONAL AIRLINES (UKI) 1 VA004–VA005 UNITED AIRLINES (UAL) 1 VA007–VA008 VA016 VN491–VN494 VN496–VN499 VN501–VN513 VS091–VS104June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 16 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

UPS (UPS) 1 VR201–VR211 VW701–VW721 US AIRWAYS (USA) 1 VE141–VE142 VE144–VE149 VE151–VE152 UZBEKISTAN AIRWAYS (UZB) 1 VL806–VL807 VARIG AIRLINES (VAR) 1 VN055 VN231–VN232 VIVA MACAU (VMC) 1 VF091 VK142 VOLARE S.P.A (VLR) 1 VL931 YONA (IOP) 1 VN312 ZOOM AIRLINES (YFM) 1 VL891 VL893 VN634–VN635

IDENTIFICATION BY VARIABLE NUMBER **Variable Group** VA001–VA020 1 VA301–VA315 1 VA501–VA530 1 VA701–VA719 1 VA801–VA810 1 VB001–VB002 1 VB051–VB055 1 VB101–VB125 1 VB201–VB202 1 VB251–VB253 1 VB281–VB284 1 VB301–VB302 1 VB321–VB332 1 VB371–VB373 1 VB401 1 VB441–VB444 1 VE001–VE003 1 VE021–VE023 1 VE041–VE043 1June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 17 of 38 

### BOEING SERVICE BU **LLETIN 767-27-0186**

VE061–VE069 1 VE083–VE086 1 VE101–VE104 1 VE116–VE118 1 VE121–VE126 1 VE141–VE152 1 VE171–VE172 1 VF001–VF002 1 VF041–VF042 1 VF051 1 VF061–VF062 1 VF071–VF072 1 VF091–VF093 1 VF101–VF102 1 VF161–VF162 1 VF171–VF172 1 VF180–VF184 1 VF251 1 VK001–VK016 1 VK021–VK022 1 VK031–VK056 1 VK081–VK113 1 VK131–VK133 1 VK141–VK148 1 VK161–VK164 1 VK171 1 VK181 1 VK186 1 VL001–VL006 1 VL011 1 VL701–VL703 1 VL751–VL755 1 VL806–VL807 1 VL871–VL873 1 VL891–VL900 1 VL911–VL914 1 VL931–VL932 1 VL941 1 VN001–VN041 1 **Variable Group**June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 18 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

VN051–VN064 1 VN081–VN099 1 VN111–VN127 1 VN130–VN137 1 VN151–VN158 1 VN163–VN168 1 VN171–VN174 1 VN191–VN198 1 VN211–VN212 1 VN221–VN225 1 VN231–VN234 1 VN241–VN243 1 VN251–VN276 1 VN291–VN293 1 VN301–VN314 1 VN371–VN372 1 VN376 1 VN381–VN388 1 VN421–VN427 1 VN436 1 VN471–VN472 1 VN491–VN513 1 VN531–VN532 1 VN536–VN537 1 VN541–VN542 1 VN546–VN547 1 VN551 1 VN556–VN557 1 VN561–VN562 1 VN631–VN638 1 VN651–VN658 1 VN671–VN672 1 VN676 1 VN681–VN691 1 VN731–VN732 1 VN751–VN753 1 VN791–VN792 1 VN811–VN813 1 VN921–VN922 1 **Variable Group**June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 19 of 38 

### BOEING SERVICE BU **LLETIN 767-27-0186**

VN931–VN936 1 VN951–VN953 1 VN966–VN972 1 VR051–VR060 1 VR081 1 VR201–VR211 1 VR251 1 VR256–VR260 1 VR401 1 VR421–VR423 1 VR426 1 VR441 1 VR461 1 VR471–VR472 1 VS051–VS056 1 VS061 1 VS066–VS070 1 VS073–VS078 1 VS091–VS104 1 VS111–VS113 1 VS131–VS133 1 VS136–VS137 1 VS176–VS177 1 VS186–VS187 1 VS196–VS203 1 VS206–VS208 1 VS211 1 VS216–VS217 1 VS231 1 VS246–VS248 1 VS261–VS263 1 VS266–VS274 1 VS291–VS293 1 VS301–VS303 1 VS306–VS311 1 VS316 1 VS321–VS324 1 VS331–VS333 1 VS336–VS337 1 **Variable Group**June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 20 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

2. Spares Affected Examine your spares supply for the parts or components identified in Paragraph 2.C., Parts Necessary for Each Airplane. If any parts or components are found, refer to Paragraph 2.C. for the recommended use. **B. Concurrent Requirements**

None.

**C. Reason** This service bulletin gives instructions to replace or rework elevator Power Control Actuator (PCA) bellcranks. As an alternative to Boeing Alert Service Bulletin 767-27A0168, the incorporation of this service bulletin combined with the repetitive check of the elevator PCA input rod assemblies recommended in Boeing Service Bulletin 767-27-0200 and the repetitive check of the elevator PCA rigging recommended in Boeing Service Bulletin 767-27-0202 will prevent continued operation with yielded or failed shear rivets in a bellcrank assembly for the elevator PCA and will also allow for longer inspection intervals. Operators are currently required by the Federal Aviation Administration (FAA) Airworthiness Directive (AD) 2001-04-09 to do the 400 flight-hour repetitive check recommended in Boeing Alert Service Bulletin 767-27A0168. VS366–VS367 1 VS381–VS382 1 VS391–VS392 1 VS401 1 VS426–VS428 1 VS466–VS472 1 VS486 1 VS496–VS497 1 VS506–VS507 1 VS526 1 VS546–VS549 1 VS701–VS703 1 VS721–VS728 1 VS751–VS753 1 VS821–VS824 1 VS841–VS843 1 VT501 1 VW701–VW721 1 VW851 1 **Variable Group**June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 21 of 38 

### BOEING SERVICE BU **LLETIN 767-27-0186**

One operator reported the left elevator drooping during a preflight check. Examination of the elevator control system found sheared rivets in the left-inboard and center PCA bellcrank assemblies. The elevator single hydraulic system check required by a Certification Maintenance Requirement (CMR) may not detect yielded or failed shear rivets in the bellcrank assemblies for the elevator PCA. As a result, the FAA issued AD 2000-17-05 to mandate the accomplishment of the actions specified in Boeing Alert Service Bulletin 767-27A0166, dated August 17, 2000. Since the issuance of AD 2000-17-05, the FAA has received reports that several 767-200, 767-300, and 767-300F airplanes failed the one-time functional check of the shear rivets required by the AD. As a result, the FAA issued AD 2001-04-09 to mandate the accomplishment of the actions specified in Boeing Alert Service Bulletin 767-27A0168, dated November 21, 2000. A detailed design review found that the override device incorporated into the elevator PCA input rod assembly provides protection against malfunctions and non-normal PCA operation. This design review also found that the shear rivets are not needed. The incorporation of this service bulletin combined with the repetitive check of the elevator PCA input rod assemblies recommended in Boeing Service Bulletin 767-27-0200 and the repetitive check of the elevator PCA rigging recommended in Boeing Service Bulletin 767-27-0202 is an alternative to the 400 flight-hour repetitive check recommended in Boeing Alert Service Bulletin 767-27A0168. Boeing Service Related Problem (SRP) 767-SRP-27-0128 is related to this service bulletin. **D. Description** Do a general visual inspection for the three PCA bellcranks assemblies on each elevator. If a bellcrank assembly has shear rivets, replace it with a solid one-piece bellcrank assembly or rework the bellcrank assembly. Do a pogo check for each elevator PCA input rod assembly. Do a mis-rig check for each elevator. **E. Compliance** Boeing recommends the instructions in this service bulletin be done within six years after the date on this service bulletin. The FAA will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory. **F. Approval** This service bulletin was examined by the Federal Aviation Administration (FAA). The changes specified in this service bulletin comply with the applicable regulations and are FAA approved, as well as European Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/ JAA approved airplanes listed in the service bulletin effectivity. This service bulletin and its approval were based on the airplane in its original Boeing delivery configuration or as modified by other approved Boeing changes. If an airplane has a non-Boeing modification or repair that affects a component or system also affected by this service bulletin, the operator is responsible for obtaining appropriate regulatory agency approval before incorporating this service bulletin.June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 22 of 38 This service bulletin has been approved by the FAA. In addition, the Manager of the FAA Seattle Aircraft Certification Office approves the action (i.e. inspection or modification) defined in this service bulletin combined with the actions defined in Boeing Service Bulletins 767-27-0200 and 767-27-0202 as an alternative method of compliance to the requirements of paragraph (a) of AD 2001-04-09. All provisions of AD 2001-04-09 that are not specifically referenced in the above statement remain fully applicable and must be complied with. **G. Manpower** The table below shows an estimate of the task-hours necessary to do this change for each airplane. This estimate is for direct labor only, done by an experienced crew. Adjust the estimate with operator task-hour data if necessary. The estimate does not include lost time. These are some examples of lost time: — Time to adjust to the workplace — Time to schedule the work — Time to examine the work — Time to cure the materials — Time to make the parts — Time to find the tools. Work Package 1 can be done at the same time as Work Package 2.

**H. Weight and Balance Changes**

None. **Work Package Number Task**  **Number of Persons Task-Hours Elapsed Hours**  1 Remove PCA Input Linkage 2 3.0 1.5 Figure 1 1 0.5 0.5 Figure 3 1 3.0 3.0 Test Input Rod Assemblies (Pogo Check) 2 4.0 2.0 Install PCA Input Linkage 2.0 3.0 1.5 Mis-Rig Test 2 1.0 0.5 TOTAL FOR WORK PACKAGE 1 14.5 9.0 2 Remove PCA Input Linkage 2 3.0 1.5 Figure 2 1 0.5 0.5 Figure 3 1 3.0 3.0 Test Input Rod Assemblies (Pogo Check) 2 4.0 2.0 Install PCA Input Linkage 2.0 3.0 1.5 Mis-Rig Test 2 1.0 0.5 TOTAL FOR WORK PACKAGE 2 14.5 9.0

TOTAL FOR EACH AIRPLANE 29.0 18.0June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 23 of 38 

### BOEING SERVICE BU **LLETIN 767-27-0186**

**I. Electrical Load Data** Not changed.

**J. References** 1. Existing Data: a. Engineering Change Memo PRR B12901-35S b. Service Related Problem (SRP) 767-SRP-27-0128 c. 767 Aircraft Maintenance Manual (AMM) 27-31-00, 27-31-06 d. Engineering Change Memo PRR B12901-35S e. 767 Structural Repair Manual (SRM) Chapter 51 f. Boeing Standard Overhaul Practices Manual (BSOPM) 20-43-03, 20-50-10 g. Component Maintenance Manual (CMM) 27-31-64, 27-31-66 h. Boeing Service Bulletin 767-27A0166 i. Boeing Service Bulletin 767-27A0168 j. Boeing Service Bulletin 767-27-0200 k. Boeing Service Bulletin 767-27-0202

l. FAA Airworthiness Directive 2000-17-05

m. FAA Airworthiness Directive 2001-04-09 n. Boeing Drawing 012W6100. 2. Data supplied with this Service Bulletin:

None. 3. Installation Drawings Used in the Preparation of this Service Bulletin:

None.June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 24 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

**K. Publications Affected**

**L. Interchangeability and Intermixability of Parts** Refer to Paragraph 2.C., Parts Necessary For Each Airplane, for interchangeability and intermixability information. **Publication Chapter-Section** 767 Illustrated Parts Catalog 27-31 Component Maintenance Manual 27-31June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 25 of 38 

### BOEING SERVICE BU **LLETIN 767-27-0186**

**2. MATERIAL INFORMATION A. Material - Price and Availability**  The operator can supply the parts and materials shown in Paragraph 2.C., Parts Necessary For Each Airplane. As an alternative, operators can purchase the parts from Boeing Spares. This service bulletin does not show the Boeing price and supply data. **B. Industry Support Information** Boeing warranty remedies are not available for the configuration changes given in this service bulletin. **C. Parts Necessary For Each Airplane**

1. Kits/Parts:

None.June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 26 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

2. Parts and Materials Supplied by the Operator:

3. Parts Modified and Reidentified: The parts shown below are changed as shown in this service bulletin. The quantity (QTY) is the number of parts changed on each airplane.

4. Parts Removed and Not Replaced:

None. **D. Parts Necessary to Change Spares**

None. **E. Special Tooling - Price and Availability**

None.

**Part Number / Specification QTY Name Existing Part Number Notes**  252T2118-6 (a) 6 PCA Bellcrank Assembly 252T2118-1 or 252T2118-2 or 256T2118-3 BACR15FT6KE9C (b) 12 Rivet 252T3139-3 or BACR15BB5AD9C BMS 3-24 1 pint Grease - (c) BMS 10-11, Type 1 8 ounces Primer - (c)

Alodine 600 or 1200 8 ounces Chemical Conversion Coating - (d)

(a) This part is required if bellcranks are being replaced. (b) This part is required if existing bellcranks are being reworked. (c) See the Qualified Products List at the end of the Boeing Material Specification (BMS) for supplier data. (d) Refer to BSOPM 20-43-03 for applicable suppliers.

**Existing Part Number QTY Name New Part Number Notes**  252T2118-1 6 Bellcrank Assembly 252T2118-4 (a), (b), (c) 252T2118-2 or 252T2118-3 6 Bellcrank Assembly 252T2118-5 (a), (b), (c) (a) This is the part number after the change given in this service bulletin, if the existing bellcranks are being reworked. (b) Do not use the existing part to replace the new or changed part. (c) This part is not used in production. The equivalent production part number is 252T2118-6.June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 27 of 38 

### BOEING SERVICE BU **LLETIN 767-27-0186**

**F. Special Tooling Necessary to do this Service Bulletin** No special tools or equipment are necessary to do the change in this service bulletin. But, maintenance and overhaul tools in the manuals given in Paragraph 1.J., References, can be necessary. Examine operator tool supply to make sure all necessary tools are available.June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 28 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

BLANK PAGEJune 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 29 of 38 

### BOEING SERVICE BU **LLETIN 767-27-0186**

**3. ACCOMPLISHMENT INSTRUCTIONS**

**A. GENERAL INFORMATION**

**WARNING:** DO NOT SUPPLY HYDRAULIC POWER DURING THE REMOVAL /INSTALLATION OF THE PCA BELLCRANK ASSEMBLY. INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.

**CAUTION:** KEEP THE WORK AREA, WIRES AND ELECTRICAL BUNDLES CLEAN OF METAL PARTICLES OR CONTAMINATION WHEN YOU USE TOOLS. UNWANTED MATERIAL, METAL PARTICLES OR CONTAMINATION CAUGHT IN WIRE BUNDLES CAN CAUSE DAMAGE TO THE BUNDLES. DAMAGED WIRE BUNDLES CAN CAUSE SPARKS OR OTHER ELECTRICAL DAMAGE.

**NOTE:** 1. Manual titles are referred to by acronyms. Refer to Paragraph 1.J., References, for definition of the acronyms. 2. Obey all of the warnings and cautions given in the specified manual sections. 3. The work instructions are divided into work packages. Task-Hours and Elapsed-Hours for each package are given in Paragraph 1.G., Manpower. The work instructions for the left and right elevators are the same and both work packages need to be completed before the plane is returned to service. 4. Unless shown differently, these dimensions and tolerances are used: — Linear dimensions are in inches — Tolerance on linear dimensions, other than rivet and bolt edge margins, is plus or minus 0.03 inch. — Tolerance on rivet and bolt edge margin is plus or minus 0.05 inch — Hole dimensions for standard solid rivets are given in 767 Structural Repair Manual, Chapter 51 5. For approved fastener and process material substitutions, refer to 767 Structural Repair Manual, Chapter 51, Alternate fasteners are given in 767 Structural Repair Manual Chapter 51 and Boeing Drawing 012W6100. 6. If the length of fasteners specified in this service bulletin do not meet the installation standards, fasteners of the same specification, or an approved substitute, one grip length longer or shorter may be used. 7. A General Visual Inspection is defined as: A visual examination of an interior or exterior area, installation or assembly to detect obvious damage, failure or irregularity. This level of inspection is made from within touching distance unless otherwise specified. A mirror may be necessary to ensure visual access to all surfaces in the inspection area. This level of inspection is made under normal available lighting conditions such as daylight, hangar lighting, flashlight or drop-light and may require removal or opening of access panels or doors. Stands, ladders or platforms may be required to gain proximity to the area being checked. 8. These work instructions refer to procedures included on other Boeing documents. When the words "refer to" are used and the operator has an accepted alternativeJune 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 30 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

procedure, the accepted alternative procedure can be used. When the words "as given in" are included in the instruction, the procedure in the Boeing document must be used.

**B. WORK INSTRUCTIONS**

**WORK PACKAGE 1 - LEFT ELEVATOR** 1. Remove elevator Power Control Actuator (PCA) input linkage. Refer to 767 AMM 27-31-06 as an accepted procedure. 2. Do a general visual inspection of the three PCA bellcrank assemblies as given in Figure 1. a. If the bellcrank assembly has solid rivets and part number 252T2118-4 or 252T2118-5, no more action is required for the bellcrank. b. If the bellcrank is a solid one-piece bellcrank (no rivets), no more action is required for the bellcrank. c. If the bellcrank assembly has shear rivets and part number 252T2118-1, 252T2118-2, or 252T2118-3, do one of the two following steps: (1) At operator’s discretion, rework the existing bellcrank to replace the shear rivets with solid rivets as given in Figure 3. After rework, the 252T2118-2 or 252T2118-3 bellcrank assembly is changed to 252T2118-5 and the 252T2118-1 bellcrank assembly is changed to 252T2118-4. (2) Obtain new solid one-piece (no rivets) bellcrank assembly 252T2118-6. Use this new bellcrank assembly in step 4. 3. Do the following functional test (pogo check) on each of the three elevator PCA input rod assemblies. a. Make sure that the load is 42-62 lbs for initial breakout in the extending and collapsing directions. b. Make sure that the load is 67-97 lbs for travel 0.005 to 0.020 inches from the fully compressed or extended position. c. Make sure that the deflection is 1.15-1.35 inches in both the fully compressed or extended position at full travel of the elevator PCA input rod assembly. d. Make sure that all operations are smooth and free from binding. e. Replace or overhaul the elevator PCA input rod assembly if it fails to meet any requirement above. Refer to CMM 27-31-64 as an accepted procedure. 4. Install elevator PCA input linkage. Refer to 767 AMM 27-31-06 as an accepted procedure. 5. Do the elevator PCA Mis-Rig test. Refer to 767 AMM 27-31-00 as an accepted procedure. 6. Put the airplane back to a serviceable condition.June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 31 of 38 

### BOEING SERVICE BU **LLETIN 767-27-0186**

**WORK PACKAGE 2 - RIGHT ELEVATOR** 1. Remove elevator PCA input linkage. Refer to 767 AMM 27-31-06 as an accepted procedure. 2. Do a general visual inspection of the three PCA bellcrank assemblies as given in Figure 2. a. If the bellcrank assembly has solid rivets and part number 252T2118-4 or 252T2118-5, no more action is required for the bellcrank. b. If the bellcrank is a solid one-piece bellcrank (no rivets), no more action is required for the bellcrank. c. If the bellcrank assembly has shear rivets and part number 252T2118-1, 252T2118-2, or 252T2118-3, do one of the two following steps: (1) At operator’s discretion, the existing bellcrank can be reworked to replace the shear rivets with solid rivets as given in Figure 3. After rework, the 252T2118-2 or 252T2118- 3 bellcrank assembly is changed to 252T2118-5 and the 252T2118-1 bellcrank assembly is changed to 252T2118-4. (2) Obtain new solid one-piece (no rivets) bellcrank assembly 252T2118-6. Use this new bellcrank assembly in step 4. 3. Do the following functional test (pogo check) on each of the three elevator PCA input rod assemblies. a. Make sure that the load is 42-62 lbs for initial breakout in the extending and collapsing directions. b. Make sure that the load is 67-97 lbs for travel 0.005 to 0.020 inches from the fully compressed or extended position. c. Make sure that the deflection is 1.15-1.35 inches in both the fully compressed or extended position at full travel of the elevator PCA input rod assembly. d. Make sure that all operations are smooth and free from binding. e. Replace or overhaul the elevator PCA input rod assembly if it fails to meet any requirement above. Refer to CMM 27-31-64 as an accepted procedure. 4. Install elevator PCA input linkage. Refer to 767 AMM 27-31-06 as an accepted procedure. 5. Do the elevator PCA Mis-Rig test. Refer to 767 AMM 27-31-00 as an accepted procedure. 6. Put the airplane back to a serviceable condition.**FIGURE 1: Left Elevator PCA Bellcrank Inspection** June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 32 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

**FIGURE 1: Left Elevator PCA Bellcrank Inspection**

ELEVATOR PCAs

BELLCRANK ASSEMBLY (TYPICAL) FOR CLARITY) (SHOWN DISASSEMBLED

(SOLID ONE-PIECE) BELLCRANK ASSEMBLY BELLCRANK ASSEMBLY (SOLID RIVETS) BELLCRANK ASSEMBLY (SHEAR RIVETS) REQUIRED NO INSPECTION NO RIVETS IN THE MIDDLE NO INSPECTION HOLE SOLID RIVETS WITH

THE MIDDLE INSPECTION HOLE IN 0.070 INCH (1.77 mm) SHEAR RIVETS WITH CENTER OUTBOARD

INBOARD

E 1 2

D C E B A FWD B SEE

B SEE SEE A

B SEE

C SEE DW34846

**(SHEET 1 OF 2) FIGURE 1: Left Elevator PCA Bellcrank Inspection**  June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 33 of 38 

### BOEING SERVICE BU **LLETIN 767-27-0186**

The step numbers shown below agree with the numbers shown in the circle symbols in the figure.

**STEP TASK NAME PART NUMBER QTY MORE DATA** 1 Inspect Bellcrank Assembly - 3 Do a general visual inspection of rivets at locations shown. Note type of rivets. 2 Inspect Bellcrank Assembly - 3 Do a general visual inspection for part number

**(SHEET 2 OF 2) FIGURE 2: Right Elevator PCA Bellcrank Inspection**  June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 34 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

**FIGURE 2: Right Elevator PCA Bellcrank Inspection**

ELEVATOR PCAs

SOLID RIVETS WITH NO INSPECTION HOLE IN THE MIDDLE NO RIVETS NO INSPECTION REQUIRED

BELLCRANK ASSEMBLY (SOLID ONE-PIECE) (SOLID RIVETS) BELLCRANK ASSEMBLY (SHOWN DISASSEMBLED FOR CLARITY)

(TYPICAL) BELLCRANK ASSEMBLY INBOARD OUTBOARD

CENTER

THE MIDDLE SHEAR RIVETS WITH 0.070 INCH (1.77 mm) INSPECTION HOLE IN

(SHEAR RIVETS) BELLCRANK ASSEMBLY FWD

A 1 B SEE

B SEE

B SEE

E D 2

SEE D C E

B SEE A

CW34845

**(SHEET 1 OF 2) FIGURE 2: Right Elevator PCA Bellcrank Inspection**  June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 35 of 38 

### BOEING SERVICE BU **LLETIN 767-27-0186**

The step numbers shown below agree with the numbers shown in the circle symbols in the figure.

**STEP TASK NAME PART NUMBER QTY MORE DATA** 1 Inspect Bellcrank Assembly - 3 Do a general visual inspection of rivets at locations shown. Note type of rivets. 2 Inspect Bellcrank Assembly - 3 Do a general visual inspection for part number

**(SHEET 2 OF 2) FIGURE 3: PCA Bellcrank Rework**  June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 36 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

**FIGURE 3: PCA Bellcrank Rework**

66.30° 66.80° LOWER ARM RIVET

SHOWN DISASSEMBLED FOR CLARITY

BELLCRANK ASSEMBLY (TYPICAL) ARM ASSEMBLY

LOWER ARM 

### B-B 0.35 0.33 ASSEMBLY ARM

DIA THRU 0.202 0.191 C/L SYMM



### A-A B

B A A

9 1

8 14 14

4

12 10 6 13

2 5 11 3 7

8

9W34847

**(SHEET 1 OF 3) FIGURE 3: PCA Bellcrank Rework**  June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 37 of 38 

### BOEING SERVICE BU **LLETIN 767-27-0186**

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for each bellcrank.

**STEP TASK NAME PART NUMBER QTY NOTES** 1 Remove / Discard Shear Rivet 252T3139-3 or BACR15BB5AD9C 2 If rivets are damaged, position bellcrank arms as required so rivet pieces are in alignment. 2 Remove /Keep Lower Arm 252T2174-( ) (a) 1 Remove lower arm from arm assembly.3 Remove /Discard Marker BAC27TCT0114 1

4 Clean Lower Arm and Arm Assembly 252T2174-( ) and 252T2173-( ) (a)(b) 2 Clean the mating surfaces of each part. If damage is found refer to CMM 27-31-66 to repair parts. 5 Install Lower Arm 252T2174-( ) (a) 1 Attach to arm assembly. 6 Inspect Lower Arm and Arm Assembly 252T2174-( ) and 252T2173-( ) (a)(b) - Make sure that the lower arm turns freely on the shaft of the arm assembly. Hold lower arm in vertical position and place arm assembly in horizontal position. Release arm assembly and make sure it rotates freely to vertical position. 7 Ream Lower Arm Hole - 1 If necessary, to increase diameter of hole to the minimum dimension (1.1255-1.1260 inch) that lets the part turn freely. Repeat with inspection until part turns freely with no binding. 8 Rotate Lower Arm and Arm Assembly 252T2174-( ) and 252T2173-( ) (a)(b) 1 To put bellcrank arms in the position shown. Use clamps to hold the bellcrank arms in position shown. 9 Drill / Ream Rivet holes - 2 Increase the diameter of the rivet holes to dimension shown (0.191-0.202 inch) while keeping bellcrank arms in position. Make sure to put a temporary cover on the bearing in the arm assembly. Metal particles can cause damage to the bearing. 10 Disassemble / Clean Lower Arm and Arm Assembly 252T2174-( ) and 252T2173-( ) (a)(b) - Make sure to remove all particles and burrs from the mating surfaces of each part. Remove the cover from the bearing. 11 Install Lower Arm 252T2174-( ) (a) - Apply grease to the mating surfaces of the lower arm and the arm assembly. Use a temporary clamp to hold the bellcrank arms in the position shown. Use Grease BMS 3-24 -

12 Install Rivets BACR15FT6KE9C 2 Apply grease to all surfaces of each rivet. Use Grease BMS 3-24 -

**(SHEET 2 OF 3) FIGURE 3: PCA Bellcrank Rework**  June 25, 2007 767-27-0186 BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 38 of 38 

### BOEING SERVICE BULLETIN 767-27-0186

13 Part Mark Bellcrank Assembly - 1 Rubber stamp new bellcrank assembly part number 252T2118-5 on arm assembly for reworked bellcrank 252T2118-2 and 252T2118-3. Rubber stamp new bellcrank assembly part number 252T2118-4 on arm assembly for reworked bellcrank 252T2118-1. Refer to BSOPM 20-50-10. 14 Apply Chemical Conversion Coating Alodine 600 or 1200 - To any bare surfaces on lower arm and arm assembly. Refer to CMM 27-31- 66. Primer BMS 10-11, Type 1 - (a) Lower arm 252T2174 -( ) part numbers are 252T2174-1, 252T2174-3, 252T2174-5 and 252T2174-6 (b) Arm assembly 252T2173-( ) part numbers are 252T2173 -1 and 252T2173 -5 **STEP TASK NAME PART NUMBER QTY NOTES**

**(SHEET 3 OF 3)**