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OENG MASTER COPY SERVICE BULLETIN DEC LU 1989 787 SERVICE BULLETIN ENGINEERING LIBRARY
REVISION TRANSMITTAL SHEET BOEING COMMERCIAL AIRPLANES POST OFFICE BOX 3707 SEATTLE, WASHINGTON 98124-2207 Boeing Service Bulletin 727-53A0124 This sheet transmits REVISION 3 dated November 30, 1989 of Service Bulletin 727-53A0124, FUSELAGE - MAIN WHEEL WELL PRESSURE FLOOR INSPECTION, MODIFICATION AND REPAIR".
NOTE: This revision constitutes a complete reissue.
SUMMARY This revision is issued to recommend the modification per this service bulletin for incorporation on aging 727 airplanes.
additional modification kit to install a 0.100 inch thick doubler between Body Station (BS) 910 and BS 930 and between Buttock Line (BL) 0 and right BL 10. The incorporation threshold for this service bulletin is shown in the Description and Accomplishment Instructions.
As a result of the FAA-sponsored Aging Fleet Conference, a 727 Structures Working Group with Airline and Boeing members and FAA observers was formed to review structural service bulletin modifications and recommend selected bulletins for incorporation on aging airplanes. Based on a structural review of the 727 airplane, the Structures Working Group has determined that modification per this service bulletin, at or before the indicated threshold, should be accomplished to support the continued structural integrity of aging 727 airplanes.
Airplane effectivity is expanded, to include all 727 airplanes, and updated to reflect current airplane ownership.
Airplanes modified per previous releases of this service bulletin require inspection until modified to add the additional doubler between BS 910 and BS 930 and between BL O and right BL 10.
The original issue of this bulletin was issued, as an Alert Service Bulletin, therefore the "A", is added to the bulletin number.
This service bulletin is rewritten to comply with current service bulletin format and therefore revision bars have been omitted because of the extensive rewrite.
REVISION HISTORY Original Issue: May 3, 1974 Revision 1: September 27, 1974 Revision 2: May 2, 1975 Revision 3: November 30, 1989
BOEING
SERVICE BULLETIN _ SUMMARY BOEING COMMERCIAL AIRPLANES POST OFFICE BOX 3707 SEATTLE, WASHINGTON 98124-2207 SUBJECT: FUSELAGE - MAIN WHEEL WELL ATA: 5314 NUMBER: 727-53A0124 PRESSURE FLOOR INSPECTION, DATE: May 3, 1974 MODIFICATION AND REPAIR REVISION 3: November 30, 1989
BACKGROUND Based on a structural review of the 727 airplane, incorporation of the modification per this service bulletin is recommended on aging airplanes.
Three operators reported cracks from 25 to 48 inches long in the Main Landing Gear (MLG) wheel well pressure floor. resulting in depressurization.
operators reported 67 airplanes with cracks up to two inches long located in the reinforcing beads between Body Station (BS) 910 and BS 940 on both sides of the airplane between Buttock Line (BL) 10 and BL 50. The airplanes had accumulated between 12,600 and 43,300 flight cycles and 18,000 and 51,600 flight hours.
Since Revision 2 five operators reported five airplanes with cracks out of the area covered by the modification of the service bulletin.
The cracks were located in the reinforcing beads between BS 910 and BS 930 and between BL 0 and right BL The airplanes had accumulated between 18,200 and 42,100 flight cycles and 21,300 and 39,900 flight hours.
Continued operation with undetected cracks could result in loss of cabin pressure. The cracks have been attributed to fatigue.
This service bulletin is the subject of Federal Aviation Administration (FAA) Airworthiness Directive 77-13-15, Amendment 39-2944.
ACTION (PRR 23792) As recommended by the 727 Aging Fleet Structures Working Group, accomplish modification per the Accomplishment Instructions at or before the accumulation of 60,000 flight cycles.
Inspect pressure floor reinforcing beads adjacent to BS 910 floor beam of airplanes that have accumulated 15,000 flights at maintenance intervals as described in the Description and Accomplishment Instructions until accomplishing preventive modification or repair per this service bulletin.
Group 2 and 3 airplanes and airplanes previously modified require inspection of unmodified areas at 2000 flight cycles intervals until accomplishing preventive modification or repair per this service bulletin.
If cracks are found within specified limits, accomplish repair per this service bulletin. If cracks exceed specified limits, contact Boeing.
If no cracks are found, accomplish the preventive modification per this service bulletin or repeat inspection at specified intervals until accomplishing preventive modification or repair per this service bulletin.
EFFECTIVITY All 727 airplanes in three groups.
Group 1 - Line numbers 1 through 1102.
Group 2 - Line numbers 1103 through 1477.
Group 3 - Line numbers 1478 through 1832.
Summary Page 1 of 2
BOING SERVICE BULLETIN 727-53A0124
MANPOWER MATERIAL INFORMATION Elapsed Kit Delivery Price Total Time Applicability Man-Hours (Hours) 65-97861-6** 22 weeks $2906.00 65-89360-128 12-08-89 $ 283.00 Inspection 2 2 Modification 222 35 ** Additional kits, suitable for Repair * repair are available. See * Time is subject to extent of repair. Paragraph II.A.1.
See Paragraph I.F for applicable terms and conditions.
STA 950 STA 910 / SEE DETAIL I STA 870 UP FWDÕ LEFT SIDE MAIN WHEEL WELL
• +1 -_STA 910
TYPICAL CRACK STA 920
DETAIL I (PLAN VIEW) May 3/74 REV. 3: Nov 30/89 Summary Page 2 of 2
BOEING COMMERCIAL AIRPLANES BOEING POST OFFICE BOX 3707 SEATTLE, WASHINGTON 98124-2207
SERVICE BULLETIN 727 ATA SYSTEM: 5314 NUMBER: 727-53A0124 DATE: May 3, 1974 REVISION 3: November 30, 1989 SUBJECT: FUSELAGE - MAIN WHEEL WELL PRESSURE FLOOR INSPECTION,
MODIFICATION AND REPAIR I. PLANNING INFORMATION A. Effectivity
1. Airplanes Affected See Service Bulletin Index Part 3 for cross reference of Variable Number to Airplane Serial Number.
This change is applicable to airplanes listed below in accordance with PRR 23792.
LISTING BY CUSTOMER CODE AND VARIABLE NUMBER
CODE GROUP VARIABLE NUMBER AAL E0301-E0303 E0305-E0309 E0311-E0326 E0328-E0330 E0332 E0334 E0336-E0339 E0345 E0348-E0349 E3075 E3519-E3520 QA014 QA101-QA141 QA854 QA856 -QA869 2 QA142 -QA187 QA188-QA199 QB801-QB810 AAT 1 E3029 E3032-E3033 E3062 E3286-E3289 ACE 1 E0130 E3148 E3651 ACN 1 QD205 2 QD206-QD212 QD215-QD217 3 QD218-QD239 AFA 1 QA351-QA352 QA551-QA556 QA559-QA570 3 QD761-QD769 QD781-QD782 May 3/74 727-53A0124 REV. 3: Nov 30/89 Page 1 of 35
BOLING SERVICE BULLE IN 727-53A0124
CODE GROUP VARIABLE NUMBER (CONTINUED) AFG 1 E5410 E5424 ALG 1 QA574-QA576 2 QB451-QB453 QB454-QB458 AMA 1 E3681 AMJ 1 E0104 E0310 E0342 E3028 E3145 E3341 E5161 E5403 ANA QA040 QA044-QA046 ANC 1 E0133 ANS 1 E0119 3 QD040 ARG 2 QD601 -QD603 3 QD450 200-0900 ASA 1 E3401 INSER E5058 E5142 QA902 9060-5060 2 QA378 QA894-QA895 QD902 QD904- QD905 25600-I560Ò ZE600-1E600 3 QB619 27980 QB624 QB626 -QB628 QD555 QD909 QD953-QD954 AUS 1 QD001-QD004 2 QD007 -QD009 3 QD010-QDO12 AVG 2 QD191-QD192 3 QD518 AVI 1 E3036 E3141-E3143 E3204 E3221-E3224 E3402 E3406 E3412 E5451 QA572 QB031 2 QD553-QD554 3 QD581-QD583 QD991-QD992 AVN 1 E0034-E0036 E3024 E3072 E3244 E3246 E3511 QA036 QA039 QA041-QA043 QA853 QD121 3 QD474-QD475 AVO E3038 May 3/14 727 - 53A0124 REV. 3: Nov 30/89
BOEING SERVICE BULLL.IN 727-5. A0124
CODE GROUP VARIABLE NUMBER (CONTINUED) AVT 1 E3654 E5225 E5405 BHR QD451 1 QB032-QB033 BLA 1 E3005 BLG 1 E5351-E5352 BNF 1 QD031 -QD032 2 QA897-QA899 QB601-QB615 3 QB616-QB617 BNR 1 E3509 BRS E3065 E5112 E5141 E5481-E5483 CAF 1 E3506 E3512 E5409 E5435 CAL 1 E0038-E0042 E0202 E0205 E3001 E3241 E3245 E3247 E3253 E5201 E5455 QA019-QA021 QA301-QA306 QA308 -QA314 QA325-QA340 2 QA341-QA344 QA890 -QA893 QA896 3 QA345-QA349 QB901-QB904 CAY 3 QB625 CKE E0304 E5050 CMA 1 QB034 QB036-QB040 QD085- QD088 2 QB041-QB046 QD444 3 QB047 -QB049 QB051-QB058 QB060-QB064 QD571-QD572 CMI 1 E3202 E3409 E3411 E3415-E3418 E5032 E5042-E5043 E5045 CMR 2 QD410 CRU 1 E3071 E3344-E3345 E3781-E3783 DAL 1 QA073-QA079 QA081-QA092 QA096-QA097 QA907 QA909 -QA917 2 QA098-QA099 QA919-QA926 QA929-QA933 QB501-QB552 3 QA939-QA946 QA949 QB553-QB575 DAN E3146 E3149 QB035 QB114 QDOO5 QD033 QD123 QD903 QLO04-QLOO5 QL031-QL032 May 3/14 REV. 3: Nov 30/89 127 - 5340124
BOEING SERVICE BULLETIN 727-53A0124
CODE GROUP VARIABLE NUMBER (CONTINUED) DHL 1 E0030 E0124 E3622 E5046-E5047 E5274 E5382 E5402 DLH 1 2B105-QB110 QB115-QB119 QB301-QB30!
2 OB310-QB316 QB351-QB352 DNV 1 E0351 DOC 1 E3206 DOM 1 E3755 E5404 2 QD351 DON 1 E3014 EAD QB065 QD452 EAL QA601-QA605 QA607 -QA620 QA622 QA624 QA627 -QA643 2 QA644-QA658 3 QA659-QA684 QA686-QA688 EKO 1 E5418 ESM 3 QD908 ETH 3 QD661-QD663 EUR 1 QA573 QA855 EVR E3101 E3151-E3152 E3275-E3276 E3652 E5104-E5105 E5108 E5273 E5277 E5281 E5426 FAA 1 E0201 E5241 FAM 1 E5353 FBT 1 E3704 FCT 1 QA901 QA904 FED 1 E0120 E0122-E0123 E0125-E0129 E0131-E0132 E0134-E0138 E3257-E3261 E3266-E3267 E3273-E3274 E3277 E3283 E3290 E5048-E5049 E5052-E5054 E5056-E5057 E5059-E5063 E5067 E5101-E5102 E5163-E5164 E5221-E5224 E5226-E5240 E5242 E5408 E5420 E5454 QD035-QD036 QD201-QD204 2 QD037-QD039 QD213-QD214 3 QD041-QD042 QL501-QL515 May 3/74 727-53A0124 REV. 3: Nov 30/89 4
BOEING SERVICE BULLETIN 727-53A0124
CODE GROUP VARIABLE NUMBER (CONTINUED) FMR 1 E3346 FRB E3655 FTL 1 E0331 E0333 E0335 E0340-E0341 E0343-E0344 E0346-E0347 E3070 E3073-E3074 E3076 E3577 FUN E3419 GEO 1 E0216 GLE 1 E3144 1 E0101 GTR 1 E3701-E3703 QA038 QA908 QA918 HAP E3114 E3452 3 QD971-QD972 HAV 1 E3026 E3116 HEM E3077 HTV 1 E3176 IAL 1 QA002 QA359 IBE QB121-QB145 QB147-QB149 2 QB151-QB153 3 QB155-QB158 ICC E3064 E3069 ICE 1 E5417 QDO06 3 QD791 INI 1 E3150 IRN 1 E0204 E3118 E3472-E3473 QD101-QD103 QD104-QD105 IRQ 2 QD421-QD423 3 QD424-QD426 JAM 2 QD281-QD284 JAT 1 QD142 -QD143 2 QD144-QD145 3 QD146-QD149 May 3/74 727-53A0124 REV. 3: Nov 30/89
BOEING SERVICE BULLETIN 727-53A0124
CODE GROUP VARIABLE NUMBER (CONTINUED) JPA 1 E0206 JTA 1 E0213 E3407 JTE 1 E0418 E0420- E0422 E3117 E3201 E3205 E3347-E3348 E3350 KAB 1 E0103 E0107 KAL 1 QA015 QA022 QA024-QA025 QA033-QA035 QA037 KBA 1 E3574 KEL E5001 E5428 KEY E0029 E0033 E3027 E3243 E3250-E3252 E3571 KLA E3604 KUW QD801-QD804 LAA 1 QA316 2 QA317-QA324 QB651 LAB E3102 E3522 E5421 2 QD161-QD163 LAC 3 QD701-QD702 QD907 LDE 1 E0032 E3103 E3517 E3573 E5051 E5115 LIL QD973 INA 2 QD446 MAA 1 E3030 MEZ 1 E0211 2 QD906 MGM 1 E3504-E3505 E3510 MME 1 E0209 MXA 1 E3171-E3172 E3174-E3175 E3553 MXG 1 E3035 E3037 May 3/74 727-5340126 REV. 3: Nov 30/89
LOEING SERVICE BULLETIN 727-53A0124
CODE GROUP VARIABLE NUMBER (CONTINUED) NAU 1 E5501 NGA 3 QLO81 NMB 1 E3242 NOB 1 QA557 -QA558 NOM 1 E5279 NWA E3021-E3023 E3025 E3031 E3034 E3039-E3040 E3173 QA701-QA703 QA705-QA706 QA708-QA720 QA722-QA723 QA725-QA745 QD441-QD443 QD445 QD447 QA746-QA753 QD448-QD449 QD453 QD711-QD717 OCP 1 E3004 OLY 1 QA001 QA801-QA805 OMA E0210 ORI 1 E3003 E5002 E5004 E5006 E5031 E5036-E5037 E5039 E5041 E5044 E5280 E5381 E5401 E5411 E5423 E5433 E5502 PAA 1 QA003 QA057-QA058 QA201-QA207 QA209-QA214 QA216-QA225 QA366 QA369-QA371 QA704 QA707 QA721 QA851-QA852 QB001-QB002 QB101 -QB104 3 QD691-QD692 QD821-QD828 PAF 1 E3203 PAN 1 E3115 PCT 1 E3507 QD401 PER 1 E3503 E3621 E5278 PEX 1 QA059-QA072 QA870-QA877 2 QA878-QA889 QD501-QD510 3 QD512-QD517 PIE 1 QA005 -QA009 QA023 QA026-QA032 QA051-QA056 QA358 QA360-QA365 QA367-QA368 2 QA372-QA373 QA928 3 QA374-QA376 REV. 3: Nov 30/89 May 3/74 727 - 5340124
BOEING SERVICE BULLETIN 727-53A0124
CODE GROUP VARIABLE NUMBER (CONTINUED) PJE 1 E0413 QAT 2 QD403 RAM 1 QA577 -QA579 2 QA581 -QA584 3 QA585 RBA 1 E0212 3 QD407 RBH QE002 RGI 1 E3285 RJA 3 QD124- QD126 RNA 1 E3784 E5419 RNF 1 E3420 RNZ 1 E5065 E5068 RVV 1 E5035 E5040 RYN 1 E5003 E5005 E5007-E5011 E5413 E5415 SAE 1 E0414 E3576 SAH 1 E3113 SAK 1 E0208 E3451 SAN 1 E3684 SCA 3 QB629 SEN 2 QD402 SIG 1 E0207 SKL E3421 STR QLO01-QL003 QD164 QD427 QD684-QD685 QL006-QL008 SYR 2 QD471-QD473 TAM E3513 E3516 E3682 3 QD741 May 3/74 727-5340124 REV. 3: Nov 30/89
BOLING SERVICE BULLETIN 727-53A0124
CODE GROUP VARIABLE NUMBER (CONTINUED) TAP 1 QA093-QA095 QD302 QD303-QD304 TBL 1 E3013 E3501 E3653 THY 1 QD321-QD322 QD324 2 QD325 QD511 QD327 -QD330 TMI 1 E3410 TNN 1 ES114 TOS 1 E3011-E3012 E3508 QA004 QA903 TOU 1 E3002 TRD 1 E3284 TRI QD910 TSI E0106 E0116 E0121 E0140 E3342-E3343 E3349 QA010-QA012 QA017 -QA018 QA353-QA355 QA357 QA606 QA623 QA625-QA626 TUN 1 QA571 QB401 2 QB402-QB407 TWA E0401-E0402 E0404-E0408 E0410 E0412 E0416-E0417 E0419 E0423 QA501-QA527 QA529-QA537 QB201-QB203 2 QB204-QB210 3 QB211-QB220 UAL 1 E0001 E0003 E0005-E0028 E3254-E3256 E3262-E3265 E3268-E3272 E3278-E3282 QA401-QA428 2 QA429 -QA474 3 QA475-QA499 QB701-QB705 ULL 1 E3523 U05 1 E0203 U06 1 E3061 E3063 E3066-E3067 UPS E5033-E5034 E5038 E5106-E5107 E5109-E5111 E5113 E5116 E5162 E5243-E5245 E5251-E5252 E5271 E5275-E5276 E5301-E5306 E5422 E5427 E5429 QA927 QA934-QA935 QD551-QD552 QA936 -QA938 May 3/74 REV. 3: Nov 30/89 727 - 53A0124