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BALIND Airplane Commercial 737 Group Service Bulletin -ALERT:
Number: 737-53A1166 Date: June 30, 1994 Summary ATA System: 5311 SUBJECT: FUSELAGE - FRAMES - BODY STATION 727 OUTBOARD CHORD AT STRINGER 18A, INSPECTION AND PREVENTIVE MODIFICATION
BACKGROUND Four operators sent reports of cracks in the outboard chord of the frame at Body Station (BS) 727 where Stringer 18A is attached. The reports were of eight airplanes with 39,000 to 54,100 flight hours and 56,200 to 73,200 flight cycles.
cracks were caused by fatigue that was started by fretting of adjacent parts. Operators have also sent reports of cracks in the outboard chord of Stringer The changes shown in this service bulletin will decrease the probability of these cracks. This area is a primary structural element. Operation with cracks in the frame will decrease the structural integrity of this area.
As part of a service bulletin validation program, the inspection, frame chord replacement, and preventive modification was completed on airpiane PG576 (Group 2) before the initial release of this bulletin.
ACTION Make an inspection of the outboard chord of the frame at BS 727 where Stringer 18A is attached Look for cracks. Do the inspection at the times given in the Compliance section.
Also, make an inspection of the outboard chord of Stringer 18A at Station 727. If cracks are found in instructions from Boeing. the outboard chord of Stringer 18A, get repair If cracks are found in the outboard chord of the frame at BS 727, install the time limited repair or replace the chord ano, optionally, install the preventive modification. If no cracks are found install the preventive modification or do the inspection again. Do the inspection at the times given in the Compliance section until the preventive modification is installed. If the preventive modification is installed, no more inspections per this bulletin are necessary.
More work is necessary for operators that have replaced the outboard chord of the frame at BS 727 as shown in Service Bulletin (SB) 737-53-1088 (refer to Compliance).
COMPLIANCE This bulletin has a Flight Safety Inspection Program that is the minimum necessary to keep the structural integrity of the outboard chord.
For airplanes with 27,000 flights to 50,000 flights, do the inspection initially within 4,500 flights after you get this bulletin. Do the inspection again at intervals of 15,000 flights until the airplane collects more than 50,000 flights.
For airplanes with 50,000 flights to 60,000 flights, do the inspection initially within 2,500 flights after you get this bulletin. Do the inspection again at intervals of 7,500 flights until the airplane collects more than 60,000 flights.
For airplanes with 60,000 flights to 70,000 flights, do inspection initially within 1,500 flights after you get this bulletin. Do the inspection again at intervals of 5,000 flights until the airplane collects more than 70,000 flights.
For airplanes with more than 70,000 flights, do the inspection initially within 500 flights after you get this bulletin. Do the inspection again at intervals of 3,000 flights.
BOEING COMMERCIAL AIRPLANE GROUP P.O. BOX 3707 SEATTLE, WASHINGTON 98124-2207 Summary Page 1 of 2
BOEING SERVICE BULLETIN 737-53A1166 For airplanes with the lower part of the chord replaced by SB 737-53-1088, do the inspection at the intervals shown above.
For airplanes with the upper part of the chord replaced by SB 737-53-1088, do the inspection initially within 30,000 flight cycles after the chord was replaced. Do the inspection again at the intervals shown above for flight cycles after the chord was replaced.
EFFECTIVITY All 737-100 and 737-200 airplanes, Line Numbers 1-999, in 4 groups.
MANPOWER Refer to Paragraph I.F. Manpower.
MATERIAL INFORMATION Boeing Supplied Kits Refer to Paragraph I.G., Material - Price and Availability.
EXAMINE AREA AROUND STRINGER 18-A TWO FASTENER HOLES
CON 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) Summary Page 2 of 2
BOLING Commercial Airplane 737 Group Service Bulletin —ALERT:
Number: 737-53A1166 Date: June 30, 1994 ATA System: 5311 SUBJECT: FUSELAGE - FRAMES - BODY STATION 727 OUTBOARD CHORD AT STRINGER 18A, INSPECTION AND PREVENTIVE MODIFICATION 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. THIS SERVICE BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN
1. PLANNING INFORMATION A. Effectivity
1. Airplanes Number, and Serial Number data. Refer to Service Bulletin Index Document D6-19567, Part 3 for Airplane Variable Number, Line This service bulletin is for the airplanes shown below.
IDENTIFICATION BY CUSTOMER, CUSTOMER CODE, GROUP AND VARIABLE NUMBER
AER LINGUS (ARL) 2 PG255 PG573 PY322 3 РК029 PK641-PK642 PY281
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
AERON AVIATION (AAV) 2 PJ072
AIR ALGERIE (ALG) З РК361 PK631 PK633-PK634 PL717-PL725 PY051-PY053 Jun 30/94 737-53A1166 Page 1 of 44
BOEING SERVICE BULLETIN 737-53A1166
AIR ATLANTA ICELANDIC (AID) 2 PY002
AIR FRANCE (AFA) 3 PL502-PL503 PN101-PN112 AIR GABON S.A. (GBN) 3 PY191
AIR GUINEE (GNE) 3 РУ651
AIR MADAGASCAR (MAD) 2 PG375 3 PL793
AIR MALTA (MLT) 3 PL621-PL623
AIR NAURU (NAU) 3 РК356 PK581 PY286 AIR NEW ZEALAND, LTD. (ANZ) 3 PJ009 PJ117-PJ119 PK214 _PY741
AIR ONE AB SWEDEN (AOW) 3 PJ003 AIR SOUTH, INC. (SOT) 3 PK462 PK466
AIR TANZANIA (TNZ) 3 PY611-PY612
AIR TOULOUSE INTERNATIONAL (TOL) 2 PL716
AIR ZAIRE (ZAI) 3 PY111 PY113
ALASKA AIRLINES (ASA) З РУ112 PY134-PY135 PY270 PY461-PY462
ALBATROS AIRLINES (ABS) 2 PG251 PG253 ALL NIPPON AIRWAYS CO. LTD. (ANA) 2 PG584-PG586 3 РК711-PК716
ALOHA (ALO) 2 PG046 3 PK286-PK287 PК691-PK695 PK697 PY231 PY242 PY451
AMC AVIATION (AMF) 3 РК254 Jun 30/94 737-53A1166 2
BOEING SERVICE BULLETIN 737-53A1166 AMERICA WEST AIRLINES, INC. (AMW) 2 PC004 PG036 PL801 3 PK283 PK696 PL081 PL172 PL551-PL562
AMIRI FLIGHT (ABD) 3 PK495
ANGOLA AIRLINES (ANG) 3 PK661 PK664 PY162
ANSETT WORLDWIDE AVIATION SERVICES (AWW) 1 PA001 PA003-PA004 2 PC003 ARAMCO ASSOCIATED CO. (ARM) 3 PL151 PY241 PY243-PY244
ARKIA ISRAELI AIRLINES, LTD (ARK) 2 PG575 ASEAN AVIATION (L) INC. (ASJ) 2 PG578-PG583 ATASCO USA, INC. (ATJ) 3 PL762
AVENSA (AVN) 3 PK042-PK043
AVIATECA (AVT) 2 PL737 PL740-PL741 3 PY201
AVIOGENEX AIR TRANSPORT (AVG) 3 PL501 PL506
BEST LEISURE (BES) 3 PJ108 PJ113
BHOJA AIR (BHO) 3 PK614
BOURAQ INDONESIA AIRLINES (PTB) 2 PJ001 PL742 PL803 3 PK501 PL743-PL744 BRAATHENS S.A.F.E. (BRT) 3 PK882
BRITISH AIRWAYS (BAB) 3 PK731-PK749 PK771-PK772 PK774-PK777 PK779 PN001 CALDWELL AIRCRAFT TRADING CO. (CAS) 2 PG402
CAMEROON AIRLINES (CAM) 2 PY046-PY047 Jun 30/94 737-53A1168
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
CARNIVAL AIR (CVL) 2 PG305 PG312 PL712 3 PJ007-PJ008
CASINO EXPRESS (CIN) 2 PG279 PG436 3 PK461
CAYMAN AIRWAYS (CAY) 3 PK222 PK561
CHINA SOUTHERN AIRLINES (GUN) 3 PK636-PK637 CIS AIR HOLDINGS, LTD. (CIS) 2 PG302
COMAIR (CML) 2 PG354 PG356 CONQUEST SUN AIRLINES, INC. (CQT) 2 PG438 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
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 PK632 PL221 PL611 4 PN131-PN135
E G AND G (EGN) 2 PG037 PG208 PG210 PG215 PG431 3 PL763
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
BOEING SERVICE BULLETIN 737-53A1166 EDRESS, SHIEKH M. (SME) 3 PL505
EGYPTAIR (EGP) 3 PK255 PK257-PK258 EL AL ISRAEL AIRLINES, LTD. (ELA) 3 PL631-PL632
EURALAIR (ERA) 2 PG026 PG028-PG029 PY004 PY006
FAR EASTERN AIR TRANSPORT (FAT) 1 PA002 PA005 2 PG055 PG226 PG228 PG230 3 PK562 FAUCETT (COMPANIA DE AVIATION S.A. (FCT) 2 PC002 PG034 PG213 PL711 3 РК241 PL758
FLIGHTSTAR AVIATION CORPORATION (FST) 2 PG274
FORTUNE AVIATION (FOR) 3 РК432
FRENCH POSTAL OFFICE (FPO) 2 PY302 PY344 З PY101-PY103
FRONTIER AIRLINES (FRO) 2 PG306 PG308
GATARI AIR SERVICE (GRI) 3 PL441
GB AIRWAYS (GBA) 3 PJ110-PJ111
GOVERNMENT OF BRAZIL (BRZ) 3 PК068-PK069
GOVERNMENT OF MEXICO (MXG) 2 PC005 PG223
GOVERNMENT OF SHARJAH (SHJ) 3 PL581 GPA GROUP LTD. (GUI) З РК252 PК354-PK355
GULF AIR (GUL) 3 PК464 PK467-PK468
HAPAG LLOYD (HAP) 3 PL504 Jun 30/94 137-53A1166
BOEING SERVICE BULLETIN 737-53A1166
HEAVYLIFT AIRCRAFT ENGINEERING (HVL) 3 PJ109
INDIAN AIR FORCE (IDF) 2 PH712-PH713 4 PM016-PM017
INDIAN AIRLINES (IND) 2 PH70S PH711 3 PH021 PH024 PК231-PК233 PК235-PК240 PM001-PМ006 PY631
INDONESIAN AIR FORCE (IDO) 3 PL601-PL602 4 PL603
INTEGRATED RESOURCES (INH) 1 PG271 2 PG273 PG403 INTERAMERICA S.A. DE C.V. (INJ) 2 PL761
INTERNATIONAL AIR LEASES (IAL) 2 PG043 PG047-PG048
INTERNATIONAL AIRLINE SUPPORT GROUP (ASG) 2 PG021 "2 PG22TIONAL PACIT2 TRADINGS 4 (PT) 2 PG224 PG572 PJ102
TRAN AIR (IRN) 2 PH731 PY021 З РК391 PY022
IRAQI AIRWAYS (IRQ) 3 PY141-PY142 JAPAN TRANSOCEAN AIR CO., LTD. (SWL) 3 PK521 PiC523-PK525
JETALL HOLDING CORPORATION (JEL) 2 PY005
KENYA AIRWAYS (KEN) З РК253 PK256
LACSA (LAC) З РК357 PK871
LADECO (LDE) 2 PL802 3 PJ004-PJ006 PK212 PK281 PK826 PK830 LAN-CHILE S.A. (LAN) 3 РК360 PK825 PLO25 PL028 Jun 30/94 737-53A1166 6
BOEING SERVICE BULLETIN 737-53A1166
LAPA (LAZ) 2 PG355 3 РК047 PK051 PK463
LINA CONGO (LNA) 3 PY411
LINHAS AEREAS DE MOCAMBIQUE (LAM) 2 PH703 PY031
LITHUANIAN AIRLINES (LIJ) 3 PК563
LUFTHANSA GERMAN AIRLINES (DLH) 2 РY345-РY346 3 РК901-PК903 РК905 PK911-PK927 PK929-PK931
MALEV HUNGARIAN AIRLINES (HGA) 3 PК284-PK285 PK827
MANDALA AIRLINES (MND) 3 РК874 PLO27 PL061 PL421 PN002 MARKAIR, INC. (ALK) 4 PY056-PY057
MIDAIR (MAI) 2 PY342
MODILUFT (MOU) 3 PК908-PK910
MONTELY II (MOY) 2 PJ031
NASA (NAS) 1 PA099
NATIONAL AIRLINES (NAW) 2 PJ104 3 PJ105-PJ106 NICA (NICARAGUENCE DE AVIACION) (NIC) 3 PK823 NIGERIA AIRWAYS, LTD. (NIA) 3 PL781-PL782 PL784-PL788
NORDAM (NOP) 3 РК221
NORDIC EAST (NOE) 2 PJ002
NWT AIR (NTA) 2 PX701 З РУ132-PY133 Jun 30/94 737-53A1166
BOEING SERVICE BULLETIN 737-53A1166
OLYMPIC AIRWAYS (OLY) 3 РК301-РК304 РК307-PК310 PМ021-PМ023 P.T. AIRFAST (PTF) 2 PG204 PG278 PY343 PETROLAIR SYSTEMS S.A. (PTS) 3 PL471
PLUNA (PLU) 3 PL201-PL203 POLARIS AIRCRAFT LEASING CORP. (PLS) 1 PG272 2 PG202 PG205 PG207 PG218-PG219 PG276 PG651-PG652 3 PК026-PК028
PRESIDENTIAL AIR (PRB) 2 PG432
REPUBLIC OF NIGER (NIR) 3 PY166
ROYAL AIR MAROC (RAM) 3 PK271-PK274 PY671 4 PY672
RYANAIR (RYR) 3 PJ114-PJ115 PK801-PK804 SABENA S.A. (SAB) 3 РК041 PК044-PК046 PК048-PK050 PK052-PK053 PК431 PК433 PY272-PY275 SAETA S.A. (SAE) 3 PK211 PK213
SAHARA INDIAN AIRLINES (SAQ) 3 PK820 SAHSA (SERVICIO AEREO DE HONDURAS,S.A.) (SAH) 2 PJ032 PJ071 PL736 SAUDI ARABIAN AIRLINES CORP. (SVA) 2 PL726-PL728 PY036-PY037 3 PK311-PK317 PL729-PL735
SAUDI ROYAL FLIGHT (SRF) З РК318
SERVICIOS AEREOS RUTAS ORIENTE, (SARO) (SEV) 2 PA015 PA021-PA022 3 РК351 PK353
SHAHEEN AIR INTERNATIONAL (SHK) 3 РК514 Jun 30/94 737-53A1166
BOEING SERVICE BULLETIN 737-53A1166 SHANNONAIR LEASING LTD. (SLE) 3 РК352
SIERRA PACIFIC AIRLINES (SP) 3 PК627
SOUTH AFRICAN AIRWAYS (SAA) 2 PG353 3 PL101-PL113 SOUTHWEST AIRLINES CO. (SWA) З РК082 PК091-PK099 PK541-PK560 PК621 PK628-PK630 PM051-PM062
SUDAN (SUD) 3 PY156-PY157
T A PORTUGUESES (TAP) 3 PК971 PK973-PK974 PN083 4 PN084-PN086 TACA INTERNATIONAL AIRLINES, INC. (TAC) 2 PG059 PG352 3 PK223 PY131
TAESA (TES) 3 PK622 PK625-PK626 TAT EUROPEAN AIRLINES (TTR) PY321 2 PY003 РY301 PY361-PY362
THAI AIR FORCE (TAF) 4 PK519 THAI AIRWAYS INTERNATIONAL, INC. (TII) 3 РК511
TRANSAERO (TRX) 3 PК451-PK452 PK773
TRANSAVIA AIRLINES (TAV) 2 PG074 3 РК502-PК504 PК821
TRANSMILE AIR SERVICES (TML) 2 PY323 PY381
TUNIS AIR (TUN) 3 PKК861-PК863 PY621 UNITED AIR LINES, INC. (UAL) 1 PG001-PG004 PG006-PG008 2 PG009-PG013 PG015-PG019 PG022-PG025 PG027 PG038-PG040 PG045 PG075 PG051-PG054 PG057 PG060-PG063 PG065-PG072 PG030 PG032-PG033 3 PK201-PK202 PL002-PL023
UNITED STATES AIR FORCE (USF) 3 PJ201-PJ219 Jun 30/94 737-53A1166 9
BOEING SERVICE BULLETIN 737-53A1166 USAIR, INC. (USA) 2 PG041-PG042 PG073 PG206 PG301 PG303-PG304 PG307 PG309 PG311 PG313-PG314 PG474 PG576 3 PK288-PK289 PK591-PK599 PK601-PK610 PK883 PM101-PM117 PN021-PN028 4 PM118-PM119 PN029-PN038
USL CAPITAL (USL) 2 PY001
VARIG AIRLINES (VAR) 3 PK111-PK116 PK118-PK120 PK141-PK146 PL453-PL454
VARSA (VAB) 2 PG351
VASP (VSP) 2 PG435 3 PH011-PH013 PК061-PК062 РК065-PК067 PG437 PG439-PG440 PG471-PG473 PL756 PX071
VENEZUELA - GOVERNMENT OF (VNZ) З РК070 VISCOUNT AIR SERVICE INC. (VAS) 2 PG201 PG203 PG209 PG212 PG216-PG217 PG220-PG222 PJ101 PJ103 3 РК305-РК306
WHIRLPOOL FINANCIAL CORP (ZZW) 2 PG214 XIAMEN AIRLINES CO. LTD. (XIA) 3 РК635
YEMEN AIRWAYS (YEM) 3 РК341
ZAMBIA AIRWAYS (ZAM) 3 PK291 PL026
IDENTIFICATION BY VARIABLE NUMBER GROUP 1 PA001-PA011 PA099 PG001-PG008 PG199 PG271-PG272 GROUP 2 PA012-PA022 PA231-PA232 PC001-PC005 PG009-PG075 PG201-PG230 PG251-PG255 PG273-PG279 PG301-PG314 PG331-PG332 PG351-PG356 PG375 PG401-PG403 PG431-PG442 PG471-PG475 PG701-PG705 PH701-PH715 PG501-PG505 PG571-PG586 PG621-PG630 PG651-PG652 PH731-PH732 PH741-PH742 PJ001-PJ002 PJ031-PJ032 PJ071-PJ072 PJ101-PJ104 PL711-PL712 PL716 PL726-PL728 PL736-PL742 PL756 PL761 PL801-PL803 PX071 PX701 PY001-PY008 PY021 PY031 PY036-PY037 PY046-PY047 PY301-PY304 PY321-PY323 РY341-РY346 PY361-PY362 PY381 Jun 30/94 737-53A1166 10