Service Bulletin
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Commercial Airplane 737 Group Service Bulletin Number: 737-53A1166 Revision Transmittal Sheet Date: June 30, 1994 Revision 1: May 25, 1995 ATA System: 5311 SUBJECT: FUSELAGE - FRAMES - BODY STATION 727 OUTBOARD CHORD AT STRINGER 18A, INSPECTION AND PREVENTIVE MODIFICATION This revision includes all pages of the service bulletin. COMPLIANCE INFORMATION RELATED TO THIS REVISION Federal Aviation Administration (FAA) Notice of Proposed Rule Making, FAA Docket Number 94-NM-159-AD, is related to this service bulletin. No more work is necessary on airplanes changed as shown in the initial release of this service bulletin. SUMMARY This revision is sent to add a stringer 18A outer chord repair. In addition, instructions have been added, to trim "Time Limited Repair" parts, to eliminate interference with fasteners. Paragraph I.A., Effectivity, shows changes of airplane operators. Each operator should examine the Effectivity paragraph for changes. Vertical lines are put on the left edge of each page, except in Paragraph I.A., Effectivity, to show the location of important changes. Pages with a revision number and date, but no vertical lines, have no important changes. REVISION HISTORY Initial Release: June 30, 1994 Revision 1: May 25, 1995 BOEING COMMERCIAL AIRPLANE GROUP P.O. BOX 3707 SEATTLE, WASHINGTON 98124-2207 Commercial Airplane 737 Group Service Bulletin Number: 737-53A1166 Summary Date: June 30, 1994 Revision 1: May 25, 1995 ATA System: 5311 SUBJECT: FUSELAGE - FRAMES - BODY STATION 727 OUTBOARD CHORD AT STRINGER 18A, INSPECTION AND PREVENTIVE MODIFICATION BACKGROUND More work is necessary for operators that have replaced the outboard chord of the frame at BS 727 Four operators sent reports of cracks in the as shown in Service Bulletin 737-53-1088. Refer to outboard chord of the frame at Body Station (BS) Compliance. 727 where Stringer 18A is attached. The reports were of eight airplanes with 39,000 to 54,100 flight COMPLIANCE hours and 56,200 to 73,200 flight cycles. The cracks were caused by fatigue that was started by This bulletin has a Flight Safety Inspection Program fretting of adjacent parts. Operators have also sent that is the minimum necessary to keep the structural reports of cracks in the outboard chord of Stringer integrity of the outboard chord. 18-A. For airplanes with 27,000 flights to 50,000 flights, do The changes shown in this service bulletin will the inspection initially within 4,500 flights after you decrease the probability of these cracks. This area get this bulletin. Do the inspection again at intervals is a primary structural element. Operation with of 15,000 flights until the airplane collects more than cracks in the frame will decrease the structural 50,000 flights. integrity of this area. For airplanes with 50,000 flights to 60,000 flights, do As part of a service bulletin validation program, the the inspection initially within 2,500 flights after you inspection, frame chord replacement, and preventive get this bulletin. Do the inspection again at intervals modification was completed on airplane PG576 of 7,500 flights until the airplane collects more than (Group 2) before the initial release of this bulletin. 60,000 flights. ACTION For airplanes with 60,000 flights to 70,000 flights, do the inspection initially within 1,500 flights after you Make an inspection of the outboard chord of the get this bulletin. Do the inspection again at intervals frame at BS 727 where Stringer 18A is attached. of 5,000 flights until the airplane collects more than Look for cracks. Do the inspection at the times 70,000 flights. given in the Compliance section. For airplanes with more than 70,000 flights, do the Also, make an inspection of the outboard chord of inspection initially within 500 flights after you get this Stringer 18A at Station 727. If cracks are found in bulletin. Do the inspection again at intervals of the outboard chord of Stringer 18A, do the repair. 3,000 flights. If cracks are found in the outboard chord of the For airplanes with the lower part of the chord frame at BS 727, install the time limited repair or replaced by SB 737-53-1088, do the inspection at replace the chord and, optionally, install the the intervals shown above. preventive modification. If no cracks are found, install the preventive modification or do the For airplanes with the upper part of the chord inspection again. Do the inspection at the times replaced by SB 737-53-1088, do the inspection given in the Compliance section until the preventive initially within 30,000 flight cycles after the chord modification is installed. If the preventive was replaced. Do the inspection again at the modification is installed, no more inspections per intervals shown above for flight cycles after the this bulletin are necessary. chord was replaced. BOEING COMMERCIAL AIRPLANE GROUP P.O. BOX 3707 SEATTLE, WASHINGTON 98124-2207 Summary Page 1 of 2 BOEING SERVICE BULLETIN 737-53A1166 EFFECTIVITY MATERIAL INFORMATION All 737-100 and 737 -200 airplanes, Line Numbers 1-999, in 4 groups. Boeing Supplied Kits MANPOWER Refer to Paragraph I.G., Material - Price and Availability. Refer to Paragraph I.F. Manpower. EXAMINE AREA AROUND TWO FASTENER HOLES STRINGER 18−A (ON SOME AIRPLANES STA THE OUTER CHORD OF 727 STRINGER 18−A IS A FLAT STRAP) TYPICAL CRACK EXAMINE FORWARD EDGE OF FLANGE EXAMINE SURFACE OF S−18A AROUND TWO FASTENER HEADS LEFT SIDE SHOWN RIGHT SIDE OPPOSITE (WING−TO−BODY FAIRING NOT SHOWN) C79178 Jun 30/94 REV 1: May 25/95 Summary Page 2 of 2 Commercial Airplane 737 Group Service Bulletin Number: 737-53A1166 Date: June 30, 1994 Revision 1: May 25, 1995 ATA System: 5311 SUBJECT: FUSELAGE - FRAMES - BODY STATION 727 OUTBOARD CHORD AT STRINGER 18A, INSPECTION AND PREVENTIVE MODIFICATION THIS SERVICE BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH I.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. I. 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. This service bulletin is for the airplanes shown below. IDENTIFICATION BY CUSTOMER, CUSTOMER CODE, GROUP AND VARIABLE NUMBER AER LINGUS (ARL) 2 PY322 3 PK641-PK642 AERO CONTROLS, INC (AEO) 2 PG629 AERO COSTA RICA (AOR) 3 PK872-PK873 AEROLINEAS ARGENTINAS (ARG) 2 PH705-PH708 PH741-PH742 PY007 3 PH743 PK102-PK103 PK464 AIR ALGERIE (ALG) 3 PK361 PK631 PK633-PK634 PL717-PL725 PY051 PY053 AIR ATLANTA ICELANDIC (AID) 2 PY346 AIR FOYLE LTD. (FOY) 3 PJ108 PJ113 AIR FRANCE (AFA) 3 PL502-PL503 PN101-PN112 Jun 30/94 737-53A1166 REV 1: May 25/95 Page 1 of 51 BOEING SERVICE BULLETIN 737-53A1166 AIR GABON S.A. (GBN) 3 PY191 AIR GUINEE (GNE) 3 PY651 AIR MADAGASCAR (MAD) 2 PG375 3 PL793 AIR NEW ZEALAND, LTD. (ANZ) 3 PJ117-PJ119 PK214 PL621-PL623 PY741 AIR SOUTH, INC. (SOT) 2 PG210 PG215 3 PK221 PK351 PK353 PK462 PK466 AIR TANZANIA (TNZ) 3 PY611-PY612 AIR TOULOUSE INTERNATIONAL (TOL) 2 PL716 AIR UKRAINE (UKA) 3 PK354 AIR ZAIRE (ZAI) 3 PY111 PY113 AIRCORP (CRP) 2 PG037 AIRTRAN AIRWAYS, INC. (CQT) 2 PG438 3 PK028 ALASKA AIRLINES (ASA) 3 PY112 PY134-PY135 PY270 PY461-PY462 ALBATROS AIRLINES (ABS) 2 PG251 PG253 ALIADRIATICA (ADH) 3 PK432 ALL NIPPON AIRWAYS CO. LTD. (ANA) 2 PG584-PG586 3 PK711-PK716 ALOHA (ALO) 2 PG046 3 PK286-PK287 PK691-PK695 PY231 PY242 PY451 AMC AVIATION (AMF) 3 PK254 Jun 30/94 737-53A1166 REV 1: May 25/95 2 BOEING SERVICE BULLETIN 737-53A1166 AMERICA WEST AIRLINES, INC. (AMW) 2 PC004 PG036 PL801 3 PK283 PK696 PL081 PL172 PL551-PL562 AMERICANA DE AVIATION S. A. (AMY) 2 PG276 AMIRI FLIGHT (ABD) 3 PK495 AMORA FLIGHT CHARTER SERVICES (FCA) 2 PG047 ANGOLA AIR CHARTER (AOH) 2 PG431 ANGOLA AIRLINES (ANG) 3 PK661 PK664 PY162 ANSETT WORLDWIDE AVIATION SERVICES (AWW) 1 PA001 PA003-PA004 ARAMCO ASSOCIATED CO. (ARM) 3 PL151 PY241 PY243-PY244 ARKIA ISRAELI AIRLINES, LTD (ARK) 2 PG575 ASEAN AVIATION (L) INC. (ASJ) 2 PG578-PG583 3 PK920 AVENSA (AVN) 3 PK042-PK043 AVIATECA (AVT) 2 PL736-PL737 PL740-PL741 AVIOGENEX AIR TRANSPORT (AVG) 3 PL501 PL506 BOURAQ INDONESIA AIRLINES (PTB) 2 PL742 3 PK501 PK913 PK918 PK931 PL743-PL744 BRITISH AIRWAYS (BAB) 3 PK731-PK749 PK771-PK772 PK774-PK777 PK779 CALDWELL AIRCRAFT TRADING CO. (CAS) 2 PG402 CAMBODIAN INTERNATIONAL AIRLINES (CAK) 2 PJ072 CAMEROON AIRLINES (CAM) 2 PY046-PY047 Jun 30/94 737-53A1166 REV 1: May 25/95 3 BOEING SERVICE BULLETIN 737-53A1166 CANADIAN AIRLINES INTERNATIONAL LTD. (CDI) 2 PY303-PY304 3 PK358 PK671-PK675 PK677-PK680 PK822 PK881 PK884 PL401-PL417 PL764-PL770 PM141-PM142 PY151-PY154 PY421-PY422 PY441 CANAIR CARGO (CAZ) 3 PK026-PK027 CARNIVAL AIR (CVL) 2 PG305 PG312 PL712 3 PJ007-PJ008 CASINO EXPRESS (CIN) 2 PG279 PG436 3 PK461 CAYMAN AIRWAYS (CAY) 3 PJ009 PK222 COMAIR (CML) 2 PG353-PG354 PG356 3 PK355 CONSOLIDATED PRESS HOLDINGS (CPH) 3 PJ109 CONTINENTAL AIRLINES, INC. (CAL) 1 PA006-PA009 PA011 PG199 2 PA012 PA014 PA016-PA020 PG056 PG064 PG225 PG433 PG501-PG505 PG621-PG625 PG627-PG628 PG630 PG704 3 PL001 COPA COMPANIA PANAMENA DE AVIATION S.A. (COP) 2 PY341 3 PJ107 PJ112 PK465 PK617 PL745 PY201 CROATIA AIRLINES (CRH) 3 PK904 PK906-PK907 PK928 PK932 DAMANIA AIRWAYS LTD. (DAI) 3 PL451-PL452 PN081-PN082 DELTA AIR LINES, INC. (DAL) 3 PK611 PK613 PK623-PK624 PL221 4 PN131-PN135 E G AND G (EGN) 3 PL763 E-SYSTEMS (ESM) 2 PG208 EAS EUROPE AIRLINES (EUR) 3 PK203 PK215 PK282 PK359 PK564 PK612 EAST WEST AIRLINES (INDIA) (BOM) 3 PK615-PK616 PK819 PK824 PL171 Jun 30/94 737-53A1166 REV 1: May 25/95 4 BOEING SERVICE BULLETIN 737-53A1166 EDRESS, SHIEKH M.