# Boeing Service Bulletin 55-46: No revision named - Rights: © The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2013-0546; AD 2013-21-07 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Boeing Service Bulletin 55-46](https://openairdocs.org/service-documents/boeing/sb-55-46.md) - Title as filed: U.S. DOT/FAA - SB-727-55-0046-00 - Pages: 20 - PDF: https://openairdocs.org/files/sha256/df/62/df623e1c4c768878fd306a52cf05e6bdc9ed6d76e8a9e8e23a03cdfca50844a0 - Page: https://openairdocs.org/service-documents/boeing/sb-55-46/file/df623e1c4c76 ## Text This text is OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 (OCR) APR & 1970 BOEING THE BOEING COMPANY COMMERCIAL AIRPLANE GROUP P.O. BOX 3707 SEATTLE, WASHINGTON 98124 SERVICE BULLETIN MODEL: 727 NO: 55-46 ATA SYSTEM: 55 DATE: Apri1 8, 1970 SUBJECT: HORIZONTAL STABILIZER CENTER SECTION R/S WEB MODIFICATION COMPLIANCE: OPTIONAL I. Planning Information A. Effectivity 797 797 AIRPS 1. Airplanes Affected The following airplanes are divided into four groups because of differences in accomplishment instructions. Customer & Customer Model & Number Series Mig. Serial No. Registry No. GROUP I UA (United) E1, E3 727-22 18293 and 18294 N 7001 U and N 7002 U GROUP II EA (Eastern) E101 727-25 18252 N 8101 N JA (United) E5-58 727-22 18296 thru 18299 N 7004 U thru N 7007 U (Continued) Apr 8/70 55-46 Page 1 of 20 ### Page 2 (OCR) BOEING SERVICE BULLETIN NO. 55-46 Customer & Customer Model & Number Series Mfg. Serial No. Registry No. GROUP 11I AA (American) E301-E306 727-23 18426 thru 18431. N 1970 thru N 1975 EA (Enstern) E102-E110 727-25 18253 thru 18261 N 8102 N thru N 8110 N LH (Lufthansa) E201-E203 727-30 18360 thru 18362 D-ABIB thru D-ABID UA (United) E9-E14 727-22 18300 thru 18305 N 7008 U thru N 7013 U GROUP IV AA (American) E307-E325 727-23 18432 thru 18450 N 1976 thru N 1994 E326 727-23 18900 N 1995 E328-E329 727-23 19128 and 19129 N 1997 and N 1998 E330-E332 727-23 19130 thru 19132 N 1901 thru N 1903 E333-E337 727-23 19180 thru 19184 N 1905 thr: N 1909 E338 727-23 19385 N 1910 E339-E343 727-23 19386 thru 19390 N 1928 thru N 1932 E344-E346 727-23 19428 thru 19430 N 1933 thru N 1935 E347-E348 727-23 19431 and 19432 N 1955 and N 1956 E350-E351 £349 727-23 727-23 20044 20045 and 20046 N 1969 N 2913 and N 2914 QA1U1-QA122 E3577-E3578 E3075-E3077 E3510-E3520 QA123-QA127 QA128-CA140 727-35 727-123 727-223 727-223 727-95 727-223 19833 thru 19835 19475 thru 19496 19700 thru 19704 19838 and 19839 19836 and 19837 20180 thru 20192 N 1962 and N 1963 N 1964 and N 1965 N 6800 thru N 6821 1957 thru N 1959 6827 thru N 6839 6822 thru N 6826 QA141 727-223 20193 N 6841 Apr 8/70 ### Page 3 (OCR) BOEING SERVICE BULLETIN NO. 55-46 Customer & Customer Model & Number Series Mfg. Serial No. Registry No. AF (Air France) QA551-QA554 727-220 19543 thru 19546 F-BOJA thru F-BOJD QA555-2A556 727-228 19861 and 19862 F-BOJE and F-BOJF QA557-24559 727-220 19863 thru 19865 F-BPJG thru F-BPJI QA560 727-228 20075 F-BPJJ 2A561-2A563 727-220 20202 thru 20204 F-BPJK thru F-BPJ AL (Allegheny) QB0O1-QB0O2 727-2B7 20302 and 20303 N 750 VJ and N 751 VJ AN (Ansett) E3011-E3012 727-77 18743 and 18744 VH -RME and VH-RMF E3013-E3014 727-77 18844 and 19253 VH-RMD and VH-RMR E5501 727-770 20278 VH -RMS AS (Alaska) £3173 727-14 18910 N 972 PS E5141-E5142 727-90C 19169 and 19170 N 797 AS and N 798 AS E5143 727-90C 19728 N 766 AS AT (Royal Air Morocco) QA577 727-2B6 20304 CN-CCF AV (Avianca) E3221-E3222 727-59 19127 and 19303 HK-727 and HK-1337 E3223-E3224 727-59 19662 and 19663 HK-1400 and HK-1401 BN (Braniff) E3501 727-162 19243 E3508 727-191 19393 N 299 BN E3521 727-116 20217 N 304 BN E3651-E3652 727-27 19499 and 19500 N 7289 and N 7290 E3653-E3654 727-27 19501 and 19534 N 7292 and N 7293 E3655 727-27 19535 N 7294 E5001 727-51C 18897 N 303 BN E5101-E5112 727-270 19109 thru 19120 N 7270 thru N 7281 E5113-E5114 727-270 19246 and 19497 N 7287 and N 7288 E5115-E5116 727-270 19532 and 19533 N 7295 and N 7296 E5251-E5252 727-620 19244 and 19245 N 7284 and N 7286 E3502-E3503 727-193 19304 and 19305 N 2969 G and N 2979 G E3507 727-193 19620 N 898 PC (Continued) ADr 8/70 55-46 3 ### Page 4 (OCR) BOEING SERVICE BULLETIN NO. 55-46 Customer & Customer Model & Number Series Mfg. Serial No. Registry No. BO (Boeing) QA001 727-200 19536 N 7270 L QA315-QA316 727-224 20244 and 20245 N 1782 B and N 1783 B QA019-QA020 727-200 E5451 727-24C 19524 N 5475 E5452-E5454 727-24C 19525 thru 19527 N 5472 thru N 7474 BW (British W. Indian) E3101-F3103 727-78 18794 thru 18796 9Y-TCO thru 9Y-TCQ CF (Faucett) E3677 727-63 19846 OB-R-902 CI (China Air) E3506-E3512 727-109 19399 and 19520 B 1818 and B 1820 E5435 727-109C 20111 B 1822 CO (Continental) E5455 727-24C 19528 N 2475 2A 301-2A305 727-224 19510 thru 19514 N 88701 thru N 88705 QA306-QA313 727-224 19797 thru 19804 N 88706 thru N 88713 QA314 727-224 20243 N 88714 QA325 727-224 20384 N 88715 2A326-2A329 727-224 20385 thru 20388 N 32716 thru N 32719 CP (Canadian Pacific) E3681-E3682 727-17 20327 and 20328 CF-CPN and CF-CPK EA (Eastern) E111-E140 727-25 18262 thru 18291 N 8111 N thru N 8140 N E3341-E3350 727-25 18965 thru 18974 N 8141 N thru N 8150 N E5221-E5225 727-250 19298 thru 19302 N 8151 G thru N 8155 G E5226-E5230 727-250 19356 thru 19360 N 8156 G thru N 8160 G E5231-E5236 727-250 19717 thru 19722 N 8161 G thru N 8166G E5237-E5245 727-250 19850 thru 19858 N 8167 G thru N 8175 G QA601-QA611 727-225 20144 thru 20154 N 8825 E thru N 8835 E 55-1:6 Apr 8/70 ### Page 5 (OCR) BOEING SERVICE BULLETIN NO. 55-46 Customer & Customer Model & Number Series Mfg. Serial No. Registry No. EJ (Executive Jet) E5402-E5410 727-1550 19618 and 19619 N 530 EJ and N 531 EJ FA (Fed. Av. Agency) E3059 727-61 19176 N 127 FG (Ariana Afghan) E5424 727-1130 20343 YA -FAU FI (Icelandair) E5401 727-108C 19503 TF-FIE FL (Frontier) E3504-E3505 727-191 19391 and 19392 N 7270 F and N 7271 F E3509-E3510 727-191 19394 and 19395 N 7273 F and N 7274 F QA002-2A004 727-291 19991 thru 19993 N 7276 F thru N 7278 F QA 359 727-214 20162 N 7279 F FY (American Flyers) E5417-E5426 727-1850 19826 and 19827 N 12826 and N 12827 IR (Iran National) E3471-E3472 727-86 19171 and 19172 EP-IRA and EP-IRB E3473-E3474 727-86 19816 and 19817 EP-IRC and EP-IRD JL (Japan Air) E3141-E3146 727-46 18874 thru 18879 JA 8307 thru JA 8312 E3147-E3149 727-46 19279 thru 19281 JA 8318 thru JA 8320 E3150-E3151 727-46 19282 and 19283 JA 8325 and JA 8326 E3152 727-46 20078 JA 8327 E3451-E3452 727-89 19138 and 19139 JA 8314 and JA 8315 LA (Lan-Chile) E3517 727-116 19811 CC-CAG E5419-E5420 727-116C 19813 and 19814 CC-CFD and CC-CFE (Continued) Apr 8/70 55-40 5 ### Page 6 (OCR) BOEING SERVICE BULLETIN NO. 55-46 Customer & Customer Model & Number Series Mig. Serial No. Registry No. LB (Bolivia) E3522 727-140 20279 CP-861 LH (Lufthansa) E204-E206 727-30 18363 thru 18365 D-ABIF thru D-ABIH E207-E210 727-30 18366 thru 18369 D-ABIK thru D-ABIN E211-E212 727-30 18370 and 18371 D-ABIP and D-ABIQ E213-E215 727-30 18933 thru 18935 D-ABIR thru D-ABIT E216 727-30 18936 D-ABIV E5271-E5272 727-300 19008 and 19009 D-ABIW and D-ABIX E5273-E5274 727-300 19010 and 19011 D-ABIZ and D-ABIA E5275-E5276 727-300 19012 and 19310 D-ABIE and D-ABII E5277-E5278 727-30C 19311 and 19312 D-ABIO and D-ABIU E5279-E5280 121-300 19313 and 19314 D-ABIY and D-ABIJ 5281 727-300 19793 D-ABBI MX (Mexicana) E3171-E3172 727-14 18908 and 18909 XA-SER and XA-SEU E3174 & E3177 727-14 18911 and 19398 XA-SEA and XA-SEN E3553 727-64 19427 XA-SEM E3511 727-114 19815 XA -TUY NA (National) E3061-E3067 727-35 18811 thru 18817 N 4610 thru N 4616 E3068-E3070 727-35 18845 thru 18847 N 4617 thru N 4619 - E3072-E3074 727-35 19165 thru 19167 N 4620 thru N 4622 QA201-QA225 727-235 19450 thru 19474 N 4730 thru N 4754 NE (Northeast) E3243-E3251 727-95 18850 and 18858 N 1631 and N 1632 E3571-E3574 727-95 19249 thru 19252 N 1633 thru N 1636 E3575-E3576 727-95 19595 and 19596 N 1637 and N 1638 QA008-2A009 727-291 19994 and 19995 N 1648 and N 1649 QA005-QA007 727-295 20139 thru 20141 N 1645 thru N 1647 RA051-QA056 727-295 19444 thru 19449 N 1639 thru N 1644 2A057-QA058 727-295 20248 and 20249 N 1650 and N 11651 55-46 Apr 8/70 ### Page 7 (OCR) BOEING SERVICE BULLETIN NO. 55-46 .Customer & Customer Model & Number Series Mfg. Serial No. Registry No. NH (A11 Nippon) E3111-E3113 727-81 18821 . and 18823 JA 8301 and JA 8303 E3114-E3115 727-81 18919 and 18920 JA 8305 and JA 8306 E3116-E3117 727-81 18951 and 18952 JA 8316 and JA 8317 • E3118 727-81 19557 JA 8321 QA010-QA012 727-254 20250 thru 20252 N 547 PS thru N 549 PS QA015-QA018 727-200 NW (Northwest) E3021-F3031 121-31 18797 thru 18807 N 461 US thru N 471 US E3032-E3034 727-51 18942 thru 18944 N 472 US thru N 474 US E3035-E3040 727-51 19121 thru 19126 N 475 US thru N 480 US E5002-E5003 727-51C 18898 and 18899 N 490 US and N 491 US E5004-E5006 727-51C 18945 thru 18947 N 492 US thru N 494 US E5007 727-510 19206 N 495 US E5008-E5011 727-51C 19287 thru 19290 N 496 US thru N 499 US E5413-E5415 727-1510 19867 and 19868 N 488 US and N 489 US 2A701-QA716 727-251 19970 thru 19985 N 251 US › thru N 266 US QA717-QA724 727-251 20289 thru 20296 N 267 US thru N 274 US OA (Olympic) QA801-QA804 727-284 20003 thru 20006 SX-CBA thru SX-CBD QA805 727-284 20201 SX-CBE PA (Pan American) E3401-E3408 727-21 18992 thru 18999 N 314 PA thru N 1 321 PA E3409-E3411 727-21 19005 thru 19007 N 323 PA thru N 325 PA E3412-E3415 727-21 19035 thru 19038 N 326 PA thru N 329 PA E3416-E3421 727-21 19257 thru 19262 N 355 PA thru N 360 PA E5161-E5164 727-21C 19134 thru 19137 N 339 PA thru N 342 PA PS (Pacific Southwest) E3175 & E3176 18912 and 18990 N 974 PS and N 975 PS QA351-8A357 19683 thru 19689 N 528 PS thru N 534 PS QA358 727-214 20161 N 535 PS QA360-QA365 727-214 20163 thru 20168 N 537 PS thru N 542 PS QA366 727-214 20169 N 545 PS (Continued) Apr 8/70 55-46 7 ### Page 8 (OCR) BOEING SERVICE BULLETIN NO. 55-46 Customer & Customer Model & Number Series Mfg. Serial No. Registry No. RD (Airlift Internat.) E5411-E5412 727-172C 19665 and 19666 N 725 AL and N 726 AL E5428-E5429 727-1720 19807 and 19808 N 727 AI and N 732 AL RG (Varig) E3751 727-41 * * SA (South African) E3201-13205 727-44 18892 thru 18896 ZS-SBA thru ZS-SBE E3206 727-44 19318 ZS-SBF E5481 727-44C 19319 ZS -SBG SN (Sabena) E3621-E3622 727-29 19400 and 19401 00-STA and 00-STC E5351-55352 727-290 19402 and 19403 00-STB and 00-STD E5353 727-290 19987 00-STE TC (Trans Caribbean) E5423 727-1A7C 20143 N 8789 R QA013-QA014 727-2A7 20240 and 20241 N 8790 R and N 8791 R TI (Trans Internat.) E5418-E5421 727-1710 19859 and 19860 N.1727 I and N 1728 T TN (Trans Australia) E3001-E3002 727-76 18741 and 18742 VH-TJA and VH-IJB E3003-E3004 727-76 18843 and 19254. VH-TJC and VH-TJD E3005 727-76 20228 VH-TJE TP (T.A. Portugueses) E3601-E3603 727-82 19404 thru 19406 CS-TBK thru CS-TBM E5381-E5382 727-82C 19597 and 19968 CS-TBN and CS-TBO 55-46 Apr 8/70 8 ### Page 9 (OCR) BOEING SERVICE BULLETIN NO. 55-46 Customer & Customer Model & Number Series Mfg. Serial No. Registry No. TW (Trans World) E401-E410 727-31 18569 thru 18578 850 TW thru N 859 TW E411-E416 727-31 18750 thru 18755 849 TW thru N 844 TW E417-E418 727-31 18902 and 18903 N 831 IW and N 833 TW E419-E422 727-31 18904 thru 18907 1 839 IW thru N 842 TW E423 727-31 19228 N 889 TW E3701-E3702 727-31 20112 and 20113 N 7890 and N 97891 E3703-E3704 727-31 20114 and 20115 7892 and N 7893 E5301-E5306 727-31C 19229 thru 19234 N 890 TW thru N 895 TW E5422-E5427 727-180C 19873 and 19874 N 9516 T and N 9515 T QA501-2A508 727-231 19558 thru 19565 N 12301 thru N 12308 EI580-60570 727-231 19828 thru 19832 N 52309 thru N 52313 57570-+7560 727-231 20047 and 20048 N 94314 and N 64315 727-231 20049 N 44316 8750-275O 727-231 20050 and 20051 N 74317 and N 74318 32570-67550 727-231 20052 thru 20055 N 64319 thru N 64322 2A523-QA524 - 727-231 20098 and 20099 N 64323 and N 64324 QA525-QA527 727-231 20232 thru 20234 N 5425 thru N 54327 QA528-QA532 727-231 20306 thru 20310 W 54328 thru N 54332 UA (United) £42 727-22 18791 N 7003U E15-E41 727-22 18306 thru 18332 N 7014 U thru N 7040 U E3241-E3242 727-22 18848 and 18849 N 7041 U and N 7042 U E3244-E3250 727-22 18851 thru 18857 N 7044 U thru N 7050 U E3252-E3265 727-22 18859 thru 18872 N 7052 U thru N 7065 U 727-22 19079 thru 19088 N 7066 U thru N 7075 727-22 19140 thru 19154 N 7076 U thru N 7090 727-22QC 19089 thru 19103 N 7401 U thru N 7415 U 0905-9405 727-22QC 19191 thru 19205 N 7416 U thru N 7430 U E5061-E5062 727-22QC 19805 and 19806 N 7431 U and N 7432 U E5063-E5068 727-22QC 19890 thru 19895 N 7433 U thru N 7438 U QA401-QA406 727-222 19537 thru 19542 N 7620 U thru N 7625 U 2A407-24423 727-222 19899 thru 19915 N 7626 U thru N 7642 U 2A424-QA428 727-222 20037 thru 20041 N 7643 U thru N 7647 U (Continued) Apr 8/70 55-46 ### Page 10 (OCR) BOEING SERVICE BULLETIN NO. 55-46 Customer & Customer Model & Number Series Mfg. Serial No. Registry No. VN (Air Vietnam) E5409-E5414 727-121C 19818 and 19819 XV-NJB and XV-NJC WA (Western) CA901-QA906 727-247 20263 thru 20268 N 2801 W thru N 2806 W WD (Wardir) E3071 727-11 19242 CF-FUN WI (Worlu) E5403-E5408 727-173C 19504 thru 19509 N 690 WA thru N 695 WA ZB (Transair Sweden) E3513-E3516 727-134 19691 and 19692 SE-DDA and SE-DDB E5433 727-134C 20042 SE-DDC ZI (Air Asia) E5201-E5202 727-92C 19173 and 19174 N 5055 and N 5092 * Number not available. 55-440 Apr 9/70 10 ### Page 11 (OCR) BOEING SERVICE BULLETIN NO. 55-46 2. Spares Affected No Boeing supplied spares. B. Reason To improve the service life of the horizontal stabilizer center section rear spar web. Description The horizontal stabilizer center section rear spar has a riveted web in the bay between BL 14.0 and Stabilizer Station 32.08. Fatigue tests at Boeing indicate cracks may occur at the upper fastener holes in this riveted web. If cracks in the riveted web are allowed to progress, damage may occur to the rear spar forging. No cracks have been reported on in-service airplanes. To reduce the possibility of cracks and improve the service life of the spar or web on earlier airplanes, operators may install an additional web on the opposite side from the existing web. On later airplanes, the existing web may be replaced with one of thicker material. It is suggested that this rework be accomplished at major overhaul nearest to 20,000 hours. D. Compliance Compliance is optional. E. Approval The modification described herein has been approved by the FAA Designated Engineering Representative at The Boeing Company. F. Manpower Approximately 16 man-hours and a crew of 2 men are required to accompish this modification. Apr 8/70 55-46 11 ### Page 12 (OCR) BOLING SERVICE BULLETIN NO. 55-46 G. Material - Price and Availability The kits identified in paragraph IIIA may be obtained from Boeing within the terms and conditions defined below. After expiration of the quotation, price and delivery data will be provided upon request. Listed below are the starting times and rates for delivery and price of this/these Service Bulletin Kits. When no rate is shown, all kits are available at the indicated starting time. When source capacity is limited and tooling or material availability is the pacing factor, customer purchase orders will receive an allocation, from the available quantities, based on receipt date of purchase order by the Spares Department. Delivery dates are computed from the expiration date of this quotation, if received prior to the expiration date. Information regarding improved delivery dates at increased prices may be obtained upon request through normal spares procurement channels. Part Number Description Delivery Rate Unit Price 65-62347-1 Kit 22 weeks All $137.00 65-62347-2 Kit 22 weeks All $111.00 65-62347-3 Kit 22 weeks All $111.00 65-62347-4 Kit 22 weeks AlI $ 27.30 Date Apri1 8, 1970 The prices quoted are subject to the terms and conditions of Boeing's standard purchase order acknowleogement. quotations are subject to acceptance within yu days from date hereon. Any carts which are offered at "No Charge" are subject to charge after expiration of the 90-day period Prices quoted in United States Dollars. Terms: Net 30 days. Address purchase orders and correspondence pertaining to this quotation to K. A. Stadum, Director, Spare Parts Department, and refer to this service bulletin number. H• Tooling - Price and Availability None I. Weight and Balance Change In Basic Weight Change In Basic Moment 727-100 + 2.1 pounds + 3332.4 pound-inches Airplanes 727-200 + 2.1 pounds + 3584.4 pound-inches Airplanes 55-46 Apr 8/70 12 ### Page 13 (OCR) BOEING SERVICE BULLETIN NO. 55-46 J. References 1. Existing Data: Maintenance Manual Subject 12-30-8. 2. New or revised data supplied in support of this bulletin: The following drawings are furnished with this service bulletin: Drawing No. Sheet Rev.Ltr • ADCN Title 65-33105 1 E Fitting - Center Section, Rear Spar Horiz. Stab. Assy. 65-33105 2 B Fitting - Center Section, Rear Spar Horiz. Stab. Assy. 65-62347 1 Kit Instl. - Fitting, Center Section, Rear Spar Horiz. Stab. 65-62347 2 Kit Instl. - Fitting, Center Section, Rear Spar Horiz. Stab. II. Accomplishment Instructions (PRR 23121-1) A. Gain access to rework area as follows: 1. Remove stabilizer access panel 9113 (LH) 9213 (RH), inspection panel 9121 (IH) 9221 (RH), and access door 9112 (IH) 9212 (RH). See Maintenance Manual Subject 12-30-8. 2. Remove electric power from elevator hydraulic power, elevator position sensor and elevator trim sensor systems per operator's standard procedure. 3. Remove electrical plug and receptacle from clip on aft side of rear spar fitting web and move wire bundles clear of web. See Figure 1, Detail I. Apr 8/70 55-46 13 ### Page 14 (OCR) BOEING SERVICE BULLETIN NO. 55-46 B. On Group I and Group II airplanes, remove clip 66-18286-2 and stiffener 66-18364-1 from aft side of web. Discard stiffener and retain clip for reinstallation. See Figure 1, Detail I. C. On Group III and Group IV airplanes, remove clip and stiffener from aft side of web. Retain both parts for reinstallation. D. On Group I, II and III airplanes, inspect web for cracks in area indicated in Detail I, using eddy-current or equivalent. If cracks are found, contact Boeing for instructions. E. If no cracks are found, accomplish rework as follows: 1. On Group I airplanes, accomplish 65-62347-1 kit installation per Drawing 65-62347, Sheet 1 and 2. 2. On Group II airplanes, accomplish 65-62347-2 kit installation per Drawing 65-62347, Sheet 1 and 2. 3. On Group III airplanes, accomplish 65-62347-3 kit installation per Drawing 65-62347, Sheet 1 and 2. 4. On Group IV airplanes, replace existing web with 65-62347-4 kit installation per Drawing 65-33105, Sheet 1 and 2, and Drawing 65-62347, Sheet 1, Flagnote and Detail I. F. Reinstall all parts removed for access, restore electric power and operationally check elevator systems. 55-46 Apr S!70 14 ### Page 15 (OCR) BOEING SERVICE BULLETIN NO. 55-46 STA 1726 STA 1473 REAR SPAR CENTER SECTION FORGING R. STAB. STA 32.08 SEE REAR VIEW L. STAB. STA 32.08 STAR. STA 32.08 R. STAB. LBL RBL STA 32.08 14.0 14.0 - SEE DETAIL I REAR VIEW OF CENTER FORGING FIGURE L. REAR SPAR CENTER SECTION WEB MODIFICATION Apr 8/70 35-116 15 ### Page 16 (OCR) BODING SERVICE BULLETIN NO. 55-46 II AND III ES, EDDY-CURRENT WEB FOR CRACKS AREA GROUP AIRPLAN INSPECT THIS ÖINBDU EXISTING STIFFENER EXISTING WEB EXISTING 66-18286-17 CLIP (REF) ELECTRICAL & RECEPTACLE PLUG (REF) (SIMILAR ON ALL INSTALLATIONS) REAR SPAR CENTER SECTION FORGING (REF) DETAIL I REAR VIEW REFER TO DRAWING FOR REWORK INFORMATION CF-CPN, CF-CPK AIRPLANES 65-62347 REFER TO DETAIL II FOR CP 727-17, NOTE: FIGURE 1. REAR SPAR CENTER SECTION WEB MODIFICATION 55-46 Apr 8/70 16 ### Page 17 (OCR) BOEING SERVICE BULLETIN NO. 55-46 REINSTALL CLIP WITH RIVET BACR15BB3D6 (GROUP IV AIRPLANES ONLY) REINSTALL STIFFENER WITH RIVET BACR15BB406 (GROUP IV AIRPLANES ONLY) • REINSTALL CLIP WITH RIVET BACR15BB3D6 › 1rrENER 66-18364-1 (REMOVE AND REINSTALL) WEB 65-33105-3 (-4 OPP) (REMOVE) WEB 65-33105-7 (INSTALL) DISCONNECT BRACKET 66-18286-4 (-5 0PP) (REMOVE AND REINSTALL) DETAIL II APPLICABLE TO CP 727-17, CF-CPN, CF-CPK AIRPLANES ONLY. FIGURE 1. REAR SPAR CENTER SECTION WEB MODIFICATION Apr 8/70 55-4ó 17 ### Page 18 (OCR) BOEING SERVICE BULLETIN NO. 55-46 III. A. Part Number Nomenciature 1 65-62347-1 Kit Assembly, consisting of the following parts: 1 65-62347-2 Kit Assembly, consisting of the following parts: 1 65-62347-3 Kit Assembly, consisting of the following parts: 65-62347-4 Kit Assembly, consisting of the following parts: 2 65-33105-7 1 65-62347-5 Web 1 65-62347-6 Web 1 65-62347-7 Web 65-62347-0 Web 65-62347-9 Web 1 65-62347-10 Web 65-62347-11 Filler 6 4 4 65-62347-12 Filler 2 2 65-62347-13 Filler 6 4 65-62347-14 Filler 2 65-62347-15 Filler 6 65-62347-16 Filler 2 2 65-62347-17 Filler 65-62347-18 Laminated Shim 65-62347-19 Laminated Shim BACR15BB3D6 Rivet 2 BACR15BB3D7 Rivet 8 BACR15BB4D4 Rivet BACR15BB4D6 Rivet 42 42 +2 BACR15BB6D10 Rivet 2 4 4 BACRI 5BB6D13 Rivet 2 2 BACR1 5BB8D10 Rivet 118 2 BACR1 5BB8D11 Rivet 76 74 78 BACR1 5BB8D12 Rivet 8 160 174 BACR1 5BB8D13 Rivet 55-46 Apr 8/70 18 ### Page 19 (OCR) BOEING SERVICE BULLETIN NO. 55-46 Quantity Part Number Nomenclature 2 BACS4OR06C22 Laminated Shim 4 BACS40RO7C15 Laminated Shim 4 BACS40RO7C17 Laminated Shim 2 2 BACS4ORO7C23 Laminated Shim 2 BACS40RO7C32 Laminated Shim 6 BACS4ORO7C33 Laminated Shim 6 4 BACS4ORO7C35 Liminated Shim Kit required for Group I airplanes. Kit required for Group II airplanes. Kit required for Group III airplanes. Kit required for Group IV airplanes. TABLE I Vendor Information Boeing Part No. Vendor Part No. Vendor BACR15BB( )D( ) Aluminum Company of America 1145 Wilshire Blvd. Vernon, Calif. 90058 Blake Rivet Company 5030 Firestone Blvd. Southgate, Calif. 90280 National Rivet and Mig. Co. 1-21 East Jefferson St. Waupun, Wisc. 53963 Olympic Screw and Rivet Corp. 11441 So. Dolan St. Downey, Calif. 90241 Precision Rivet Co. 11201 Hindry Ave. Los Angeles, Calif. 90045 Apr 8/70 55-46 19 ### Page 20 (OCR) BOLING SERVICE BULLETIN NO. 55-46 TABLE I (Continued) Boeing Part No. Vendor Part No. Vendor BACS4OR( )C( ) Blaisdell Manufacturing, Inc. 6881 Stanton Ave. Buena Park, Calif. 90620 Laminated Metal Products, Inc. 1342 Coronado Ave. Long Beach, Calif. 90804 Laminated Shim Co., Inc. 48 Union St. Glenbrook, Conn. 06906 Shims, Incorporated 3729 Catalina St. Los Alamitos, Calif. 90720 B. Parts Required to Modify Spares None C. Removed Parts Recommended Part Number Nomenclature Disposition 65-33105-3 Web 65-33105-4 Web * 66-18364-1 Stiffener * * Dispose of this part in accordance with existing procedures. D. Special Tools and Equipment Required None PREPARED BY THE BOEING COMPANY COMMERCIAL AIRPLANE GROUP ENGINEERING SERVICE SECTION 55-46 Anr 8/70 20 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.