### Number : MD11-28A148 

### Original Issue : August 29, 2014 AT A System : 2825 

### Commercial Airplanes 

## ALERT 

# MD11 Service Bulletin

SUBJECT : 

### FUEL- S hroud Fuel Drain (All) - Pressure Check/lnspecVRepair Fu e l Line Shrouds Export of this technology is contro ll ed under the United States Export Administration Regulations ( EAR) (15 CFR 300-774 ) . An export li cense may be required before it is used for devel opment, production or use by foreign persons from specific co untri es. The cont ro ll er of this data h as the individual responsibility to abide by a ll export laws . ECCN : 9 E 991 

## BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET Copyright © 2014 Boeing. Unpublished Work . All Rights Reserved . Treatment of this do c ument and its content is governed by cont ract with Boeing . Rights to u se thi s document a re licensed on a per aircraft basis and such rights may not be transferable . For more information , contact The Boeing Company . Boeing, the Boeing si gnature, the Boeing symbol , 707, 717, 727, 737 , 747, 757 , 767 , 777, 787, Dreamliner , BBJ , DC -8, DC-9 , DC-10 , KC-10 , KC-46, KDC-10 , MD-10, MD-11, MD -80 , MD- 88 , MD -90 , P-8 , Poseidon and Boeing li veries 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.

Origin a l Iss u e : Augu st 29 , 2014 3 .0 MD11 -2 8A148 1 of 46

### BOEING SERVICE BULLETIN MD11-28A148 ALERT

Original I ss ue : August 29, 2014 BLANK PAGE

Export Con tr olled ECCN : 9E991 - BOEIN G PROPRIETARY -**Copy ight** **~** Unpu blished Work - See page 1 for details . 

### ALERT

MD11-28A148 

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### BOEING SERVICE BULLETIN MD11-28A148 ALERT ALERT Table of Contents 

### Summary ................................. . ................. . .. 5 1 . PLANNING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 

### A. Effe ctivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 1 . Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2 . Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0 B . Concurrent Requirements . . . . . . . . . . . . . . . . . . 10 C . Reason . . . . 10 D . Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 E . Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 F . Approval . . . . . . . . . . . . . . . . . . . . . . . . 1 3 G . Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 H . Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 I . Electrica l Load Data . 14 

### J . References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 1 . Exi sting Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2 . Data Supp lied with this Service Bulletin : . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3 . In sta ll ation Drawings Used in the Preparation of this Service Bulletin : . . . . . . . . . . . 15 K . Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 

### L. Inte rchangeability and lntermi xability of Parts . 15 M . Software Accomplishment Summary . 15 2. MATERIAL INFORMATION . . . . . . 17 A. Material - Price and Availability . . . . 17 B . Indu stry Support Inform ation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 C . Pa rts Ne cessary for Each Airplane . . . . . . . . . . . . . . . . . . . . 17 1 . Kits/Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2. Parts and Material s Supplied by the Operator . 1 7 3. Parts Modified and Re identified . . . . . . . . 18 4 . Parts Removed and Not Replaced . . . . . . . 18 D . Parts Ne cessary to C hange Spares . . . . . . . . . . . 18 E . Specia l Tooling- Pri ce and Availability ....... . . F. Specia l Tooling Necessary to do this Service Bulletin . 3. ACCOMPLISHMENT INSTRUCT ION S . . . . . . . . . ... 18 18 19 A . GENERAL INFORMATION .. ..... .. .......................... .. 19 B . 

### WORK INSTRUCT ION S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 CENTER CARGO COMPARTMENT LEFT TUNNEL - FUEL LINE SHROUDS - INSPECTION FIGURE 1 :

.. . ..... . .......... .. ......... ..... .. . ............ 23 APPENDI X 

### A: CHECK FOR PRESENC E OF FUEL AT THE FU E L S H ROUD DRAIN VALV ES. . 25 AP PENDI X B : PRESSURE TEST O F THE TAIL TANK FUE L SHROUD DRAIN SYSTE M . . . . 35 APPEND IX C: PRESSURE TEST O F THE AFT FUSELAGE FUEL SHROUD DRAIN SYS TEM . 44

Origin a l I ssue: August 29, 2 014 Export Co ntro ll ed ECC N : 9E991 - BOEING PROPRIETARY-**Copyright ~!:)**  Unpublished Work - See pag e 1 for details. 

### MD11 -28A 148 3 of46

### ALERT

Original I ssue : August 29 , 20 14 

### BOEING SERVICE BULLETIN MD11-28A148

BLANK PAGE

Export Controlled ECC N : 9E99 1 - BOE IN G PROPR I E TARY - Copyrigh t C> Unpublished Work - See page 1 for detai ls . 

### ALERT

MD11-28A148 

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### rti-IIIIEIND

Number : MD11-28A148 Original Issue: August 29, 2014 AT A System : 2825 

### Commercial Airplanes 

## ALERT 

# MD11 Service Bulletin Summary SUBJECT: FUEL- Shroud Fuel Drain (All)- Pressure CheckllnspecURepair Fuel Line Shrouds THIS BULLETIN IS SENT TO THE OPERA TORS OF RECORD OF TH E AIRPLANES SHOWN IN PARAGRAPH 1.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. CONCURRENT REQUIREMENTS None. BACKGROUND An operator reported fuel odor in the cabin . Fuel was found leaking from a cracked fuel line shroud i n the left cargo compartment equipment tunnel. There have been a minimum of 10 fuel shroud leaks in the same area since 2001. Th e Continued Operational Safety Program has made this an "airplane level safety i ssue" because of the quantity of fuel found below the cargo compartment floor . The current maintenan ce planning do cument recommends a check of the fuel s hroud system drains at each 1 A check and an air pressure lea k check of the fuel s hroud system at each 2 C check. Increasing the frequency of the fuel shroud system drain checks and adding an eddy current inspection of the fuel line shrouds between the existing air pressure leak checks will determine the condition of the fuel shrouds. If a c ra cked condition of a fuel shroud is not corrected, continued operation of an ai rplan e co uld resu lt in fuel acc umul ation below the cargo compartme nt floor and consequent inc reased risk of fire. This table i s provided to operators for planning purposes only. Refer to th e applicable se c ti ons for more information . Planning Data Affected Reference Spares Affected No Paragraph 1 .A.2 ., Spa res Affected AD Related Yes Paragraph 1.E. , Compliance and Pa ragra ph 1 . F ., Approval Weight and Balance Change No Paragraph 1 . H . , Weight and Balance Changes Ele ctrical Load Changed No Paragraph 1 . 1., Electrical Load Data Publications Affected Yes Paragraph 1.K. , Publications Affected Airplane Flight Ope rations Affected (Flight C rew No Paragraph 1 . K., Publication s Affe c ted Operations Manual and/or FAA Approved Airplane Flight Manual) Original I ss u e : August 29, 2014 E xpo rt Controlled E CC N : 9 E99 1 - BOE ING P R O PRI E TARY- Copyrig ht !C) Un pu bli shed Work - See page 1 l or d eta il s . 

### MD11-28A148 5 of 46BOEING SERVICE BULLETIN MD11-28A148 ALERT ALERT Planning Data Affected Reference 

### Kits/ Parts Required No Paragraph 2.C . 1 ., Kits/Parts Operator Supplied Parts/Material Yes Paragraph 2 .C .2 ., Parts and Materials Supplied by the Operator Special Tooling Required Yes Paragraph 2 . F . , Special Tooling Necessary to do this Service Bulletin ACTION 

### There are two options to do this service bulletin . Choose an option to best fit maintenance capabili ties or schedule . This service bulletin gives instructions to do as follows: OPTION 1 : 

### 1 . Do the following : a . Check for presence of fuel at the fuel shroud drain valves a nd do maintenance/repairs based on condi tion found . b . Do a High Frequency Eddy Current Inspection of the engine feed and tail tank transfer fuel line s hrouds and do action ba sed on condi tion found . c . Pre ssu re test the engine feed and tail tank transfer fuel line shrouds and do maintenance/repairs based on condition found . 2 . Continue with repetitive tests/i nspections described in Paragraph 1.E ., Compliance , Table 1 . OPTION 2: 

### 1 . Do the following : a . Check for presence of fuel at the fuel shroud drain valves and do maintenance/repairs based on condition found . b . Pressure test the engine feed and tail tank transfer fuel line shrouds and do maintenance/repairs based on co ndition found . 2 . Continue with repetitive tests/i nspections described in Paragraph 1 . E., Compliance , Table 2. EFFECTIVITY 

### MD-11 and MD-11 F Airplane(s) . Refer to Paragraph 1.A.1., Airplanes , for the list of affected airplane(s) . COMPLIANCE 

### The Federal Aviation Administrati on (FAA) will possibly release an A irworthine ss Directive related to this service bulletin . The Airworthiness Dire ctive will make the compliance tasks and times given in this service bulletin mandatory. Refer to Paragraph 1 . E ., Compliance . Original Issue : August 29 , 2014 E xport C ontrolled E CCN : 9 E 99 1 ·BOE I NG PROPRIETAR Y - Copyrig ht @ Unpublished Work • See page 1 l or detail s . 

### MD11-28A148 6 of46

### BOEING SERVICE BULLETIN MD11-28A148 ALERT ALERT INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the inspection and/or repair procedures given in this serv ice bulleti n. MANPOWER Refer to Paragra ph 1 . G . , Manpower. MATERIAL INFORMATION Operator Supplied Parts/Materials. Refer to Paragraph 2 .A . , Material - Price and Availability .

Original Issue: August 29 , 2 014 Export Controlled E CCN : 9 E 99 1 -BOE I NG P RO PRIETA RY - Co pyr ig ht li:l Un publi shed Work - See page 1 fo r detail s . 

### MD11-28A148 7 of46ALERT



### O ri gin a l Iss u e: Augu st 2 9 , 2014 BOEING SERVICE BULLETIN MD 1 1-28A148

Export Controlled ECCN : 9E991 -BOEING P ROP RIE T ARY - Copyright II:) Unpublis hed Work - See page 1 for details. ALERT

PRESSURE CHEC K/I N SPE CT / RE PA I R FUEL LI N E SHROUDS



### MD11 -28A148 

### 8 of46

### rti-IIIIEING

Number: MD11-28A148 Original Iss ue : Augu st 29 , 2014 AT A System : 2825 

### Commercial Airplanes 

## ALERT 

# MD11 Service Bulletin

SUBJECT: FUEL- Shroud Fuel Drain (All)- Pressure Che ck/Inspect/Repair Fuel Line Shrouds THIS BULLETIN IS SENT TO THE OPERA TORS OF RE CORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1 .A. , EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD , SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD , S END TH IS SERVICE BULLETIN TO THE NEW OWNER. 1. PLANNING INFORMATION A . Effectivity 1 . Airplanes Thi s service bulletin is for the airplanes shown below . GROUP CONFIGURATION DESCRIPTION 1 

## - Airplane Models: MD-11 , MD-11F

Original Issue : August 29, 2014 MD-11 and MD-11 F Airplan es .

Fuselage Num- Group ber 447-449 1 450-459 1 460-469 1 470 - 479 1 480-489 1 490-499 1 500-509 1 510-519 1 520 - 529 1

E xport Co ntrolled E CC N : 9 E 99 1 • BOEIN G P RO PR I ETARY • Co pyright el Un pu blis hed Work - See page 1 for detail s. 

### MD11-28A 1 48 9 of46

### BOEING SERVICE BULLETIN MD11-28A148 ALERT ALERT Fuselage Num- Group ber 530- 539 1 540-549 1 550-559 1 560-569 1 570-579 1 580-589 1 590- 599 1 600-609 1 610- 619 1 620-629 1 630-639 1 640-646 1 2 . Spares Affected None . 

### B . Concurrent Requirements None . 

### C. Reason An operator reported fuel odor in the cabin . Fuel was found leaking from a cracked fuel line shroud in the left cargo compartment equipment tunnel. There have been a minimum of 10 fuel shroud leaks in the same area s i nce 2001 . The Continued Operational Safety Program has made this an "airp lane level safety issue" because ofthe quantity of fuel found below the cargo compartment floor. The current maintenance planning document recommends a check of the fuel shroud system drains at each 1 A check and an air pressure leak check of the fuel shroud system at each 2 C check . Increasing the frequency of the fuel shroud system drain checks and adding an eddy current inspection of the fuel line shrouds between the e x isti ng air pressure leak checks will determine the condition of the fuel shrouds . If a cracked condition of a fuel shroud is not corrected , continued operation of an airplane could result in fuel accumulation below the cargo compartment floor and consequent increased risk of fire . 

### D. Description There are two options to do this service bulletin . Choose an option to best fit maintenance capabilities or sc hedule. This service bulletin gives instructions to do as follows: 

### OPTION 1: 1 . Do the following : Original Issue : August 29, 2014 Ex po rt Con t rolled E CCN : 9 E 99 1 · B O EI NG PRO PRIETARY ·Copyright C> U np ubli s hed Work • See page 1 f or detail s. MD11-28A148 10 of 46

### BOEING SERVICE BULLETIN MD11-28A148 ALERT ALERT a . Check for presence of fuel at the fue l shroud drain valves and do maintenance/repairs based on condi tion found . b . Do a Hi g h Frequency Eddy Current Inspection of the engine feed and tail tank trans fer fuel l ine shrouds and do action based on condition found. c . Pressure test the e ngine fee d a nd tail tank transfer fuel li ne sh rouds and do maintenance/repairs based on condition found . 2. Continu e with repetitive tests/inspect ions desc ribed in Paragraph 1 . E. , Compliance , Table 1 . 

### OPTION 2 : 1 . Do the foll owing: a . Check for presence of fuel at the f uel shroud drain valves and do mai ntenance/repairs based on condition found . b . Pressure test the engine feed and tail tank transfer fue l line shrouds and d o maintenance/ repairs based on co ndition found . 2. Con tinu e with repetiti ve tests/inspecti ons described in Paragraph 1 . E. , Comp li ance , Table 2 . The work in this service bulletin is done in the maintenance zone(s) given below. Affected Maintenance Zones Model Zone MD-11, MD - 11 F 181 , 3 1 6 E . Compliance The Federa l Aviation Administration (FAA) will possibly release an Airworthiness Directive rel ated to this service bulletin . The Airworthiness Directive wi ll m ake the compliance tasks and times given in thi s se rvice bu lletin mandatory . Do the required acti ons in accordance with Paragraph 3 . Accomplishment Instru ctions.

Original Issu e: August 29, 20 1 4 Export Controlled ECC N : 9E99 1 ·BOEI N G PROPR I ETARY - Copyrig ht C> Unpu bli shed Work - See page 1 for detail s . 

### MD11 -28A148 11 of 46ALERT BOEING SERVICE BULLETIN MD11-28A148 ALERT Select one of the following Compliance Tables : Option 1 -Table 1 -Check Fuel Shroud Drain Valves for Presence of Fuel. Pressure Check Fuel Line Shrouds and Eddy Current Inspect Fuel Line Shrouds for Cracks Condition Action Compliance Time Repeat Interval (Whichever Occurs (Whichever Occurs First) First) All Airplanes. Check Fuel Shroud Within 6 months after 10 days Drain Valves for Pres- the original issue date of ence of Fuel. this service bulletin . Pres sure Te sts of the Within 15 ,000 flight 15,000 flight hours (a) Ta i l Tank Fuel Shroud hours from the original Drain System and the issue date of this service Aft Fuselage Fuel bulletin . (a) Shroud Drain System . Do H ig h Frequency Ed- Within 7,500 fl ig ht hours 7,500 flight hours (a) dy Current Inspection of from the original issue fuel line shrouds . date of this service bulletin . (a) CONDITION 1 : Leakage Repair leaking Before further flight 

## - rate becomes more than 32 .0 fluid-ounces in a 24 hour period CONDITION 2: No No further action re - 

## - 

# - Crack(s) Found by High qui red . Frequency Eddy Current In s pection or Pressure Test CONDITION 3: Crack(s) Repair crack(s). Before further flight. 

## - Found by H igh Frequency Eddy Current lnspection or Pressure Test (a) When a pressure test of the fuel shroud drain system is performed , it can be used as an acceptable alternate method to the eddy current inspection provided the next eddy current inspection is done within the 7,500 flight hour interval. However, performing an eddy current inspection cannot be used as an acceptable alternate method for the pressure test of the fuel shroud drain system .

Original Issue : August 29 , 2014 Export Controlled ECCN : 9 E991 - B O EIN G PRO PRIETARY -Copyright e> Unpublished Work - See page 1 lo r details . MD11-28A148 12 of 46

### ALERT BOEING SERVICE BULLETIN MD11-28A148 ALERT Opti on 2 - Table 2 - Check Fuel Shroud Dra i n Va lyes for Presence of Fuel and Pressure Check F uel Line Shro uds Cond iti on Action Comp lia nce T i me Repeat Interval (Whichever Occurs (Whichever Occ u rs Fi rst) First) All Airplanes . Check Fu el Shroud With in 6 mon ths after 10 days Drain Va lves for Pres- th e origina l issue date of ence of Fu el. this service bulletin . Pressure Tests of the Within 7 ,500 flight hours 7 ,500 flight hours Tail Tank Fuel Sh roud from the o riginal issue Drain System and th e date of this service bu lAft Fu selage Fuel letin . Shroud Drain System . COND IT ION 1 : Leakage Repair leaki ng Before further fligh t 

## - rate becomes more th an 32 .0 fluid-ounces i n a 24 hour period CONDITION 2: No No further action re- 

# - - C rack(s) Found by quired . Pressure Test COND ITION 3: C rack(s) Repair crack(s). Before further flight. 

## - Found by Pr ess ure Test 

### F . Approval Thi s service bullet in was examined by the Fede ral Aviation Admin i stration ( FAA) . The chan ges specified in this service bu ll etin comply with the app l ica ble regulations and are FAA approved, as well as European Aviation Safety Agency ( EASA)/Joint Aviation Authorities (JAA) approved fo r all EASA/JAA approved ai rpl anes listed in the service bulletin effectivity . This service bulletin and Its approval were based on the airp l ane in its original Boeing delivery co nfi gurati o n or as modified by other approved B oeing changes. If a n airplane has a non-Boeing modification or repair that affects a component or system also affected by thi s service bu ll etin , the ope rator i s respo nsible for o bta ining appropriate regulatory agency approval before incorporating this service bu ll etin . 

### G . Manpower The table be low shows an estimate of the tas k hours necessary to do th is inspection/repair for each airplane . This estimate is for di rect labor o nly, done by an experienced crew. Adjust the estimate with operator task h o ur data if ne cessary . Th e estimate does not in cl ude lost time. These are some examp l es of l ost time : Time to adjust to the workplace Time to schedu le th e work Time to in spect the wo r k Time to c ure the materia ls Time to make the parts O ri ginal Issue : Aug ust 29 , 2014 Export Controlled ECCN : 9E991 - BOE I NG PROPRIETARY· Copyright CC> Unpublished Wo rk - See page 1 for details . MD11-28A 148 13 of 46

### BOEING SERVICE BULLETIN MD11-28A148 ALERT ALERT Ti me to find the tools. Option 1 Task Number of Persons Task Hours Elapsed Hours Open Access 1 0 .5 0 . 5 Check drain valves 1 1 .0 1 . 0 FIGURE 1 (Inspection) 4 .0 4 .0 Pressure test fuel shroud 2.0 2 . 0 Close Access 1 0.5 0 .5 TOTAL FOR EACH AIRPLANE 2.0-5 .0 (a) 2 .0- 5.0 (a) (a) A range of Task Hours and Elapsed Hours are given to do the tasks outlined in th is service bulletin for ai rplane s with no repairs necessary. Actual Task Hours and Elapsed Hours are con tingent upon co mpl iance interva l a nd any repairs that may be nece ssary . Option 2 Task Number of Persons Task Hours Elapsed Hours Open Access 1 0 .5 0.5 Check drain valves 1 1 .0 1 .0 Pressure te st fuel shroud 2 .0 2.0 Close Access 1 0 .5 0 .5 TOTAL FOR EACH AIRPLANE 2.0- 3 .0 (a) 2 .0-3.0 (a) (a) A range of Task Hours and Elapsed Hours are given to do the tasks outl ined in this service bulletin for airplanes with no repairs necessary . Actual Task Hours and Elapsed Hours are co ntingent upon compliance interval and any repairs that may be necessary . H. Weight and Balance Changes None . I. Electrical Load Data Not changed . J. 

### References 1 . Existing Data : a . MD-11 Aircraft Maintenance Manual (AMM) 06-21 -00, 28-25-06, 71-00-00 b . MD-11 Structural Repair Manual (SRM) 5 1 , 53-00-01 c . Non-Destructive Test Standard Pra c tices Manual (NDTSPM) 06-00-04 , 06-10-01 .001 d. Standard Overhaul Practices Manual (SOPM) 20-50-01 Original Issue : August 29, 2014 E xport Co ntrolled E CC N : 9E991 - BOEIN G PROPRIETARY - C opy ri ght (C) Un publi shed Work - See page 1 fo r d etails. 

### MD11 -28A148 14 of 46

### BOEING SERVICE BULLETIN MD11-28A148 ALERT ALERT 2. Data Supplied with thi s Service Bulletin: None . 3 . In stallation Drawings Used in the Preparation of this Service Bulletin : None . K. Publications Affected 1 . Publications : Publication Chapter-Section Aircraft Maintenance Manual 28-25 Maintenance Planning Document 28 2 . Damage Tolerance Based Structural I nspections : Boeing has evaluated the repairs and/or cha nges in th is service bulleti n for effects on Fati gue Critica l Structure (FCS) and for cha n ges to Damage Tolerance Inspecti ons (DTI) required in th e Maintenance Program . This service bulletin does not affect FCS , th e refore OTis are not necessary . L. Interchangeability and lntermixability of Parts Accomplishment of this service bulletin does not affect interchangeabil ity or intermixability of parts. M. Software Accomplishment Summary Not affected .

Original Iss ue : August 29 , 2014 Export Co nt r o lled E CC N : 9 E 991 - BO EI NG PRO PRI ETARY - Co py r ig ht CC U n publ i sh ed Work - S ee page 1 for de tails . 

### MD1 1-28A148 1 5 o f 4 6BOEING SERVICE BULLETIN MD11-28A148 ALERT

Original Issue: August 29, 2014 BLANK PAGE

E xport Co ntro ll ed E CC N : 9E99 1 - BOEIN G PROPRIETARY - Copyrig ht @ Unpubli shed Work - See page 1 fo r details . ALERT

MD11-28A148 

### 16 of 

### 46

### BOEING SERVICE BULLETIN MD1 1 -28A148 ALERT ALERT 2 . MATERIAL IN FORMATION A. Mater ia l - P ri ce a nd Availab i l ity None . 

### B . Industry Support Inform ati o n Boeing warranty remedies are not available for the inspection and/or repa i r procedu res given in this service bulletin . 

### C . Pa rts Necessary fo r Each Ai rpla ne 1. Kits/ Parts None . 2. Parts and Materials S u pplied by the Operato r Option 1 and 2- No Crack(s) Found : None 

### Pa rt Numbe r 

### I Specificati o n QTY Nam e Notes (OPM 660-1) As Required Bag- Polyethylene , Se lf-sealing (a) or Equiva l ent (a) Can be p u rchased from : Landsberg , Kent H . Company, 1640 South Greenwood Street, Montebello, California , 90640 , CAGE: 60892 Option 1 and 2- Crack(s) Found · 

### Part Number 

### I Spec if icat ion QTY Name Notes PR-1422 B-2 Sealant As Required Compound - Sealing , Integral (a) (OMS 2082) Fuel Tanks and Fuel Cell Cavior ties Equivalent 515X347 Base with 910X527 As Requi red Prime r , Fluid Resistant (a) Cata lyst (OMS 1786) or Equiva l ent SkyKieen 1000 (OPM 6410) or Equivalent (OMS 1820 T1A2) or Equiva l ent Original I ssue : August 29 , 2014 As Required Solvent , Sealant Remove r

As Requi red Wipers- Cleani ng , Cotton , White

Export Controlled E CCN: 9E991 · BOEING PROPR I ETARY · Co pyright C> U npubl ished Work • See page 1 for details. 

### (b) (c)

M011-28A148 17 of 46

### BOEING SERVICE BULLETIN MD11-28A148 ALERT ALERT Part Number 

### I Specification QTY Name Notes (DPM 660-1) As Required Bag- Polyethylene , Self-sealing (d) or Equivalent (a) Can be purchased from : PRC-Desoto International , In corpo rated , 11601 United Street, Mojave, California 93501 , CAGE: 85570 (b) Can be purchased from : Solutia Incorporated , 8201 Idaho Avenue , Saint Louis , Missouri , 63111, CAGE : 1MFY8 (c) Can be purchased from: Sandler Brothers Incorporated , 3621 Medford Street, Los Angele s, California , 90063, CAGE : 019H7 (d) Can be purchased from: Landsberg , Kent H . Company , 1640 South Greenwood Street , Montebello, California , 90640 , CAGE: 60892 3 . Parts Modified and Reidentified None . 4 . Parts Removed and Not Replaced None . D . Parts Necessary to Change Spares None . E . Special Tooling- Price and Availability Test equ i pment required to perform eddy current inspections , including procurement sources, is listed in the Non-Destruct ive Test Standard Practi ces Manual (NDTSPM) . Choice of special equipment or optional test equipment and respective suppliers is at operator's option . Refer to NDTSPM 06-00-04 for additio nal s upp li er/vendor information . F. Special Tooling Necessary to do this Service Bulletin To get the test equipment required , refer to Paragraph 2 . E . , Special Tooling- Price and Availability . Maintenance and overhaul tools in the manuals shown i n Paragraph 1.J ., References , can also be necessary . Examine operator tool supply to make sure all necessary tools are available .

Original Issue : August 29, 2014 Expon Controlled E CCN : 9E991 • BOE I NG PR O PRIETARY - Copyright @ Unpublished Work - See page 1 lor delails . 

### MD11-28A148 18 of 46

### BOEING SERVICE BULLETIN MD11-28A148 ALERT ALERT 

### 3 . ACCOMPLISHMENT INSTRUCTIONS A . GENERAL INFORMATION WARNING: WHILE YOU DO WORK IN THE TAILCONE AREA , MAKE SURE THAT YOU OBEY ALL SAFETY PRECAUTIONS . IF YOU DO NOT OBEY THE PRE CAUTIONS , DEATH OR INJURY TO PERSONS CAN OCCUR. 

### WARNING : IF ELECTRICAL POWER IS APPLIED TO THE AIRPLANE , MAKE SURE YOU OBEY ALL PRECAUTIONS WHILE YOU DO WORK . IF YOU DO NOT OBEY THE PRECAUTIONS , DEATH OR INJURY TO PERSONS , AND DAMAGE TO THE AIRPLANE CAN OCCUR. 

### CAUTION : ELECTRICALLY GROUND THE AIRPLANE . THIS WILL HELP TO PREVENT DAMAGE TO THE AIRPLANE OR EQUIPMENT . 

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

### NOTE: 1 . Manual titles are referred to by acronyms . Refer to Paragraph 1 .J. , Refere nces , for definition of the acronyms. 2 . Equivalent parts are listed in the AEPL , Drawi ng 7595071 . 3 . Use the approved fastener and process materi al substitutions, i n accordan ce with MD-11 SRM 51. 4 . If the length ofany fastener specified in this service bulletin does not meet in stallation standards given in Structural Repair Manual (SRM) Chapter 51, then a fastener o f the same specification , or an approved substitute , with a lengt h w hi ch meets the installation sta ndards given in SRM Chapter 51 may be used . I n addition , washers may be installed for fastener grip length in accordan ce with SRM Chapter 51. Refer to SOPM 20-50-01 for alternate full threaded fasteners (screws) needed for installation in this service bulletin . 5 . A 1/8-inch thi ck stack of the same type washers called for in this service bulletin is the maximum thickness which may be used under fastener head or nut to counte ract accumulation of tolerances . EXCEPTION : When the available fastener length increments are greater than 1 / 16-inch , a 3/16-inch thick stack of the same type washers may be used . 6 . Unless shown differently, the se dimensions and to l erances are used :

Original I ssue : August 29, 2014 Linear dimensions are in inches Tolerance on linear dimensions , other than rivet and bolt edge margins , is plu s or minus 0 .03 inch . Tolerance on rivet and bolt edge margin is plus or minus 0 .05 inch Angular tolerance is plus or minus 2 degrees Hole dimensions for standard solid rivets are in MD-11 SRM 51 .

Expo rt Co nt rolled ECCN : 9E99 1 - BOEI NG PRO PRIETARY- Co pyrig ht Cl Unpubli shed Work - See page 1 fo r d etai ls. 

### MD11 -28A148 19 of 46

### ALERT BOEING SERVICE BULLETIN MD11-28A148 ALERT Torque Values: Values for structural fasteners are g iven in MD-11 Structural Repair Manual, Chapter 51 . Values for airframe maintenance tasks are included i n Chapter 20 of MD-11 A i rp lan e Maintenance Manual (AMM). Values for electrical maintenance tasks are included in Chapter 20 of Standard Wiring Practices Manual (SWPM) . Values for engine maintenance tasks are included i n Chapter 70 of MD-11 Airplane Maintenance Manual (AMM) . Non-standard torque values for maintenance tasks are included in the applicable installation step . 7. Obey all of the warnings and cautions given i n the specified manual sections . 8. These work instruction s refer to procedures included in other Boeing documents . When the words "refer to" are used and the operator has an accepted alternative procedure , the accepted alternative procedure can be used . When the words "in accordance with" are included in the instruction, the procedure in the Boeing document must be used . 9 . If it is necessary to remove more parts for access, you can remove those parts . If you can get access without removing identified parts, it is not necessary to remove all of the identified parts . Jacking and shoring limitations must be observed . 10 . Where the work instructions include installation of a kept part , a new or serviceable part with the same part number can be installed as an alternative to the kept part . 11 . This service bulletin includes functional test procedures for the systems changed by this service bulletin . More functional tests can possibly be necessary in accordance with standard maintenance practices because of interruption to other airplane systems . 12 . Use of colors in Figures is based on guidance from the ATA e-Business Program (ATA) iSpec 2200. 13. When more than one OPTION is given for a CONDITION , do only one of the OPTION numbers . When more than one ACTION is given for a CONDITION number or an OPTION number, do all of the ACTION numbers for that CONDITION number or OPTION number. 14. The compliance times for the actions in Paragraph 3 . B., WORK INSTRUCTIONS are in Paragraph 1 . E ., Compliance . B. WORK INSTRUCTIONS OPTION 1: 1 . Check for Presence of Fuel at the Fuel Shroud Drain Valves at intervals specified by Paragraph 1 . E., Compliance, Option 1 -Table 1 in accordance with APPENDIX A . 2 . Do the following : a . Gain access to area 181 , center cargo left tunne l. Refer to MD-11 AMM 06 -21-00 . Original Issue: August 29 , 2014 Export Co ntr o lled E CC N : 9 E99 1 - BO EIN G PR O PRIETARY- Co pyrigh t C Unpu blis hed Wo rk - See page 1 for detai ls . 

### MD11 -28A148 20 of 46

### ALERT BOEING SERVICE BULLETIN MD11-28A148 ALERT Do H ig h Frequency Edd y Current In spectio n for cracked fuel l ine shrouds at i nterva ls specified by Paragraph 1 . E. , Compliance , Option 1 -Table 1 in accordance with FIGURE 1 . b . Do Pressure Test ofthe Tail Tank Fuel Shroud Drain System at in terval s specified by Pa ragraph 1 . E. , Compliance Option 1- Table 1 in accordance with APPENDI X B . Ifthe pressure decrease is more than 1 .0 PSI in 

### 5 minute s, there is a crack . c. Do Pressure Test of the Aft Fuselage Fuel Shroud Drain System at intervals specified by Paragraph 1.E. , Compliance , Option 1 -Table 1 i n accordance with APPENDIX C . If the pressure decrease is more than 1 .0 PSI in 5 minutes, there is a crack . CONDITION 1: Leakage rate becomes more than 32 .0 fluid-ounces in a 24 hour per iod Repair leaking . CONDITION 2 : No Crack(s) Found No further action required . CONDITION 3 : Crack(s) Found Repair cracks found in fuel line shrouds in acco rdance with "Repai r 3 - Fuel Line Shroud Repair" MD-11 SRM 53-00-01 . 3. Close a ccess. 4. Put the airplane bac k to a serviceab le con diti o n . 

### OPTION 2: 1 . Check for Pre se n ce of Fuel at the Fuel Shroud Drain Valves at intervals specified by Para g rap h 1 . E. , Compliance , Option 2 - Table 2 in accordance with APPENDIX A . 2 . D o the following : a. Do Pressure Test ofthe Tail Tank Fuel Shroud Drain System at intervals specified by Parag raph 1 . E ., Compl iance , Option 2- Table 2 in acco rdan ce with APPENDIX 

### B. If the pressure decrease is more than 1 . 0 PSI in 5 minutes , there is a crack . b . Do Pressure Test of the Aft Fu se lage Fuel Shroud Drain System at intervals specified by Paragraph 1 . E., Compliance, Option 2 - Table 2 in acco rd a n ce with APPENDIX C . If th e pressure decrease is m o re than 1 .0 PSI in 5 minutes , th e re is a crack . CONDITION 1 : Leakage rate becomes more than 32.0 fluid-ounces in a 24 hour period Repair leakin g. CONDITION 2: No Crack(s) Found N o fu rther action required .

Original Iss ue : August 29, 2 014 Export Co ntrolled ECCN : 9 E 991 - BO EIN G PROPR I ETARY - Copyright ICi Unpubli shed Work - See page 1 for detail s. MD1 1-28A148 21 of 4 6ALERT BOEING SERVICE BULLETIN MD11-28A148 ALERT 

### CONDITION 3 : Crack(s) Found Repair cracks found in fuel line shrouds in accordance with "Repair 3 - Fuel Line Shroud Repair" MD- 11 SRM 53-00-0 1 . 3 . Close access . 4 . Put the airplane back to a serviceable co nd iti on .

Original Issue : August 29, 2014 Expo rt Controll ed EC CN : 9 E99 1 - BO E I N G PR O PR IETA RY - Copy rig ht 

### e U npubl is hed Wo rk - See page 1 fo r details . 

### MD11-28A148 22 of 46ALERT BOEING SERVICE BULLETIN MD11-28A148



### STA 1761.000 

# I STA 1781 .000 

# I I 

## I STA 1801 .000 

## I I 

## I STA 1821 .000 

## I I 

## I ALERT

FIGURE 1: CENTER CARGO COMPARTMENT LEFT TUNNEL - FUEL LINE SHROUDS - INSPECTION (SHEET 1 OF 2) Origina l Iss ue : A u gust 29, 2014 Export Controlled ECCN : 9E991 - BOEING PROPRIETARY - Copyrig ht C> Unpublished Work - See page 1 l or details . MD11-28A148 23 of 46

### BOEING SERVICE BULLETIN MD11-28A148 ALERT ALERT The step numbers shown be low agree with the numbers shown in the c ircle symbol s i n the figure . The QTY numbers shown below are the number of parts necessary for each airplane . 

### ST EP TASK NAME IDENTIFICATION QTY MORE DATA 1 In spect Engine Feed and Ta il Tank AAL7288-1 2 (a) Fue l Dra in S hroud Assem- an d blies AAL7289-1 (a) Do H ig h Frequency Eddy Current In spection of the highlighted areas of the eng i ne fee d and tai l tank transfe r fue l line shrouds at Stations 1781 and 1801 in accordance wi th NDTSPM 06-10-01 .001 { ETHF Procedure 1) .



### FIGURE 1 : CENTER CARGO COMPARTMENT LEFT TUNNEL- FUEL LINE SHROUDS- INSPECTION (SHEET 2 OF 2) O ri gina l Iss ue : A u g u st 29 , 2014 Expo rt Con trolled E CC N : 9E991 - BOE IN G PRO P R I ETARY- Copyright C U n p u blish ed W or k - See page 1 for details . MD11 -2 8A 148 24 of 46

### BOEING SERVICE BULLETIN MD1 1- 28A148 ALERT ALERT 1 . C HE CK FOR PR ES EN C E OF FUEL AT THE FUEL S HR OUD DRAIN VALV ES a.

b .

c . Referen ces REFERENCE TITLE MD-11 AMM 7 1 -00-00 P OWER PLANT Tools/Equ ipment DESCRIPTION SPECIFICATION Contai n er - 1 Quart , Ca l ibrated 

## - Consumable Materia l s N.Qif_;_



### Equivalent replacements are permitted for the items that follow . It is possible that some mate ri a ls in the Consumable Materials chart cannot be used for some o r all ofthe necessary app li cations. Before yo u use th e materia ls, make s ure t he types, quantities , and app li catio ns of the materials necessary are legally pe rmitted in your location . A ll persons must obey all applicable federal , state, local , and provincial laws and regulations when it is necessary to work with these material s . DESCRIPTION SPECIFICATION Bag - Polyethyle ne , Self-sea l ing DPM 660-1 d . Procedure- C he ck for Presence of Fuel at the Fuel Shroud Dra in Valves WARNING :

MAK E SURE YOU OBEY ALL SAFETY PRECAUTIONS AND REGULATIONS DURI NG FUEL SYSTE M MAINTENANCE. THIS WILL PREVENT INJURY TO PERSONS AND DAMAGE TO EQUIPMENT . ( 1) Check for Presen ce of Fu el at the Fue l Shroud Drain Valve s as follows : CHECK MAXIMUM SERVICE- REMARKS ABLE LIMITS 1 

# I Put a 1 Q uart cali b rated container below the applicable drain valve (1 ). (Sheet 6 of 10)

APPENDIX A : CHECK FOR PRESENCE OF FUEL AT THE FUEL SHROUD DRAIN VALVES (SHEET 1 OF 10) Original Issue : August 29, 20 14 Export Controlled E CCN : 9E99 1 - BOEING PROPR IE TARY- Copyright (C) Unpublished Work - See page 1 f o r d eta il s. 

### MD11-28A148 25 of 46BOEING SERVICE BULLETIN MD11-28A148 ALERT ALERT CHECK MAXIMUM SERVICE- REMARKS ABLE LIMITS 2 Put a screwdriver in the poppet slot and push approximately 0 .30 inches . Drain the fuel into the contai ner. 3 When the fuel stops, relea se the poppet. (a) Use the container to mea- If the quantity is less than Make a record to monitor s ure the quantity of fuel 8 .0 fluid-ounces in a 24 the leak . drained from the shroud . hour period : (b) If the quantity is 8 .0 fluid- Make repair at the next ounces to 32 . 0 fluid - convenient mainten ance ounces in a 24 hour period : period . (c) If the leakage rate be- Do the repair at the ti me comes more than 32 . 0 flu- specified in Paragraph id-ounces in a 24 hour peri- 1 . E ., Compliance , for od : CONDITION 1 . NOTE: The requirements for the 24 hour shroud check period is as follows : The 24 hour maximum serviceable limits c heck requires that the airplane under inspection must have flown a minimum of one flight cycle in that 24 hour period , or pressurize the fuel system for a minimum of 2 hours using the requ i red airplane fuel pumps and/or run Number 2 engine for approximate ly 25 minutes . Refer to MD-11 AMM 71-00-00. NOTE : You ca n do a check of the leakage for more than or less than 24 hours of tim e. To do so , adjust the permitted leakage rate in proportion to the quantity of the time change . For example : 4 fluid-ounces i n 12 hours . NOTE : If there is leakage from the aft valve , the leak source is the tail tank shroud drain line . If there is leakage from the forward valve , the l eak source is the Number 2 engine shroud drain line. POST MD11-28-115 If there is leakage from the aft drain valve (Sheet 6 of 10), do as fo llows : 4 Put a con tainer below the horizontal tank fuel shroud c heck drain valve (2) . {S heet 7 of 10) 5 Put a screwdriver in the poppet slot and push approximately 0 .30 inches . Drain the fuel . into the container. 6 When the fuel stops , release the poppet.

APPENDIX A : CHECK FOR PRESENCE OF FUEL AT THE FUEL SHROUD DRAIN VALVES (SHEET 2 OF 10) Ori ginal Iss ue : August 29, 2014 Expo rt Co ntr olled ECCN : 9 E 991 - BOEIN G PRO PRIETARY - Copyrig ht C> U n publi shed W o rk - See page 1 fo r d eta il s. MD11-28A148 

### 26 of 

### 46BOEING S ERVICE BULLE TI N MD 11- 28A148 ALERT ALERT CHEC K MAXIMUM SERV ICE- REMARKS ABLE LIMITS (a) Use a contai ner to mea- If t he quantity is less th an Make a record to mon itor sure the quantity of fuel 8 .0 flu i d- ounces in a 24 the leak . drained from the s hr oud . ho u r pe riod . (b) If the quantity is 8 .0 fluid- Make repair at the next ounces to 32 . 0 fluid- convenient ma intenance ounces i n a 24 hour period : peri od . (c) If the leakage rate be- Do the repair at the time comes more than 32 . 0 flu- specified in Paragraph id-ounces in a 24 hour peri- 1 . E. , Compliance , f o r od : CONDITION 1 . (d) A quantity of fu e l i s d etect- There is a l eak in the sysed at the check/drain valve. tem upst ream of the check/drain valve . (e) No fue l is detected at the T he leak is in system check/drai n va lve (4). downstream of the check/drain valve . If t here is leakage from the ce nter tank fue l shroud check drain va lve (Sheet 8 of 10 ) , d o as follows : 

### 7 Put a contai ner be low the center ta n k fue l s hroud check drain va lve (3). 8 Put a screwdriver in the poppet s l ot and push approximately 0 . 30 inches . Dra i n the fue l into t he container . 9 When the fuel stops , re lease the poppet. (a) Use a container to mea- If the quantity is less than Make a record to m o n itor sure t he q ua ntity of f uel 8 .0 fluid-o u nces in a 24 the leak . d rained from the shroud . hou r period. (b) If the quantity is 8.0 fluid - Make repa i r at the next ounces to 32 .0 fl u id- convenient maintenan ce oun ces in a 24 hour period : period . (c) If the l eakage rate be- Do the repair before the comes more than 32 .0 flu- next flight. id-ounces in a 24 hour peri od : (d) A quantity of fue l is detect- There is a leak in th e sysed at the check/drain valve . tem upstream of the ch eck/drain va lve. If there is leakage from the aft l eft w i ng fu e l s h roud check drain valve (Sheet 9 of 10 ) , d o as follows : 10 Put a containe r below the aft left wing fuel shroud check drain valve (4) .

APPENDIX A : C HECK FOR PRES E NCE OF FU E L AT TH E FUEL S H ROUD DRAIN VA LV ES (SHEET 3 OF 10) Original I ssue : August 29, 2014 Export Controlled E CC N : 9 E99 1 - B O E I NG PR OPRIET A RY-**Copy righ** **~** U npu bli shed Work - See page 1 for d et ai ls. MD1 1-28A 148 27 of 4 6BOEING SERVICE BULLETIN MD11-28A148 ALERT ALERT CHECK MAXIMUM SERVICE- REMARKS ABLE LIMITS 11 Put a screwdriver in the poppet slot and push approximately 0 . 30 inches . Drain the fuel into the container. 12 When the fuel stops, release the poppet. (a) Use a conta i ner to mea- If the quantity is less than Make a record to mon itor sure the quantity of fuel 8 .0 fluid-ounces in a 24 the leak . drained from the shroud . hour period . (b) If the quantity is 8 .0 fluid- Make repair at the nex t ounces to 32 . 0 fluid - convenient maintenan ce ounces in a 24 hour period: period . (c) If the leakage rate be- Do the repair at the time comes more than 32 .0 flu- s pecified in Paragraph id-ounce s in a 24 hour peri- 1 . E., Compliance , for od : CONDITION 1 . (d) A quantity of fuel is detect- There is a leak in the sysed at the check/drain valve . tem upstream of the check/d ra i n valve . If there is leakage from the aft fuselage fuel shroud check drain valve (Sheet 10 of 10), do as follows : 13 Put a container below the aft fuselage fuel shroud check drain valve (5) . 14 Put a screwdriver in the poppet slot and push approximately 0 .30 inches . Drain the fuel into the container. 15 When the fuel stops , release the poppet. (a) Use a container to mea- If the quantity is less than Make a record to monitor sure the quantity of fuel 8 .0 fluid-ounces in a 24 the leak . drained from the shroud . hour period . (b) If the quantity is 8 .0 fluid- Make re pa i r at the next ounces to 32 .0 fluid- convenient maintenance ounces in a 24 hour period : period . (c) If the leakage rate be- Do the repair before the comes more than 32 .0 flu- next flight. id-ounces in a 24 hour peri od : {d) A quantity of fuel is detect- T here i s a leak in the sysed at the check/drain valve . tem upstream of the c heck/drain valve . 16 Remove the appl i cable check/drain valve in those areas where a quantity of fuel is detected . 17 Install a clear plastic bag over the applicab l e check/drain valve opening . APPENDIX A : CHECK FOR PRESENCE OF FUEL AT THE FUEL SHROUD DRAIN VALVES (SHEET 4 OF 10) Ori ginal Issue: August 29 , 2014 Export Controlled E CC N : 9 E 99 1 - BO E I N G P ROPRIETARY- Copyright C Unp u blis hed Work - See page 1 for d etail s. MD11-28A148 28 of 46BOEING SERVI C E BULLETIN M D11-2 8A148 ALERT A L ERT CHECK MAXIMUM SERVICE- REMARKS ABLE LIM ITS 18 P ressuri ze th e fue l system for a minimum of2 hours, and/o r run the Number 2 engine for approximate ly 25 minutes , refer to MD-1 1 AMM 71-00-00 . 19 Exami ne the bags for f uel. NOTE : If you t hink there is remaining fuel i n the shroud system , replace bag s and repeat. (a) Measu re t h e quantity offu - If the quanti ty is less tha n Make a record to m o n itor e l drained from the shroud . 8 .0 fluid-ounces i n a 24 the leak . hour period : If the quantity is 8.0 flu id- Make repa i r at the next ounces to 32 . 0 fluid- convenient maintenance ounces in a 24 hour period : period If the leakage rate be- Do the repair at the ti me comes more than 32 .0 flu- specified in Paragraph id-o u nces i n a 24 hour peri- 1 . E. , Compliance , for od: CONDIT ION 1 .

APPENDIX A : CH ECK FOR PR ES E NCE OF FUEL AT T HE FU EL SHROUD DRAIN VALVES (SH E ET 5 OF 10) Origina l Issue : A u gust 29 , 2014 Export Con tr olled ECC N : 9E991 - BO EIN G PROPRIETARY -**Copyr ght** **~** Unpublished Work - See page 1 for details . MD11-28A148 29 of 46BOEING SERVICE BULLETIN MD11-28A148 ALERT ALERT

SHROUD FUEL DRAIN

APPENDIX A: CHECK FOR PRESENCE OF FUEL AT THE FU,EL SHROUD DRAIN VALVES (SHEET 6 OF 10) Original Is sue : August 29, 2014 Export Co ntrolled ECCN : 9E991 -BO EI NG PR OPR IET ARY - Copyrig ht C Unpub lished Work - See page 1 fo r details . MD11 -2 8A148 30 of 46ALERT BOEING SERVICE BULLETIN MD11-28A148



# A-A V I EW LOOKING DOWN 2

HORIZONTAL TANK FUEL SHROUD CHECK DRAIN VALVE - LOCATION POSTMD11-28·115 ALERT

S13



# B-B

APPENDIX A : CHECK FOR PRESENCE OF FUEL AT THE FUEL SHROUD DRAIN VALVES (SHEET 7 OF 10) Origina l Iss ue : August 29, 2014 Export Controlled ECCN : 9E991 - BOEING PROPR I ETARY - Copyright C> Unpublished Work - See page 1 for details . MD11-28A148 31 of 46ALERT BOEING SERVICE BULLETIN MD11-28A148

I INBOARD END O F TUB E AS SY 

## I X= O .OOO AIRPLANE CE NT ER LIN E C E N TER TANK F UEL SHROUD C H EC K DRAIN VALVE - LOCATI O N POST MD11 -28-115 ALERT

APPENDIX A: CHECK FOR PRESENCE OF FUEL AT THE FUEL SHROUD DRAIN VALVES (SHEET 8 OF 10) 

### O ri g in al I ss u e: Augu st 29 , 2014 Export Controlled ECCN: 9E991 - BOE I NG PROPRIETARY - Copy rig ht C Unpublished Work - See page 1 l or details. 

### M D 1 1-28A148 

### 32 of 

### 46BOEING SERVICE BULLETIN MD11 -28A148 ALERT

I I 

# I I I



# ____________L__

____________ I I 

# I I

AFT LEFT WING FUEL SHROUD CHECK DRAIN VALVE - LOCATIO N POST MD11 -28-115 Xors=1 30 .400

LOOKI NG DOW N ROTATED60° COUNTERCLOCKW I SE ALERT

APPENDIX A : CHECK FOR PRESENCE OF FUEL AT THE FUEL SHROUD DRAIN VALVES (SHEET 9 OF 10) Origi nal Issue : August 29, 2014 Export Controlled ECCN : 9 E991 -BOEIN G P ROPR IET ARY - Co pyright Cl Unpubli shed Work • See page 1 for details. MD11-28A148 

### 33 of 

### 46ALERT BOEING SERVICE BULLETIN MD11 -28A148

A FT FUSELAG E FU EL SHROUD CH ECK DRAI N VALV E- LOCATI ON POST MD11 - 28-115 ALERT

APPENDIX A : CHECK FOR PRESENCE OF FUEL AT THE FUEL SHROUD DRAIN VALVES (SHEET 10 OF 10) O riginal Iss ue : August 29, 20 14 Export Co ntrolled ECCN : 9E991 - BOEING PROPR I ETARY - Co pyright C Unpublished Work - See page 1 fo r details . MD11 -28A 148 34 of 46BOEING SERVICE BULLETIN MD11-28A148 ALERT ALERT 

### 1 . PRESSURE TEST OF THE TAIL TANK FUEL DRAIN SHROUD SYSTEM a . Fixtures , Tools , Test and Support Equipment. Equivalent replacements are permitted for the items that follow : REFERENCE DESIGNATION 

### Not specified Ladder or work platform 12 ft minimum AN929-6 Cap DZZ7379-501 Tester , fuel tank and drain shroud system Not specified Dry air source , regulated 6 .0 psi , minimum b . Access Panels Number Name/Location 

### 3 16AB AFT FUSELAGE c . Job Set-up- Tail Tank Fuel Shroud Drain System P ressure Test (1) Open this access panel : Number Name/Location 

### 316AB AFT FUSELAGE d . Procedure- Tail Tank Fuel Shroud Drain System Pressure Test PRE MD11-28A056 

### NOTE : There are two drain lines and one extended drain line on the right side of the tail tank front spar. There is one drain line on the left side of the tail tank front spar. The drain li nes have check valves attached . (Sheet 5 of 9) POST MD11-28A056 

### NOTE : There are not two drain lines and one extended drain line on the right side at the ta il -tan k front spar. They are sealed with caps . The drain line on the left side is sealed with a cap . The check valves are removed . (Sheet 6 of 9) PRE MD11-28-115 

### NOTE : There are no check/drain valves added to the fuel shroud dra i n system . APPENDIX B : PRESSURE TEST OF THE TAIL TANK FUEL SHROUD DRAIN SYSTEM (SHEET 1 OF 9) 

### Original Issue : August 29, 2014 E xpo rt Co ntrolled ECCN : 9E991 • BOEI NG PROPRIETARY • Copyrig ht CC> U npubli shed Work • See page 1 for d eta il s. 

### MD11-28A148 35 of 46ALERT BOEING SERVICE BULLETIN MD11-28A148 ALERT POST MD11-28-115 NOTE : There are check/drain valves added to the fuel shroud drain system . These check/drain valves help the personnel find the leaks qu i ckly . PRE MD11-28A056 OR PRE MD11-28-115 (1) Do a pre ssure test of the tail tank fuel shroud drain system (Sheet 7 of 9) as follows : (a) In the aft fuselage , disconnect the tail tank fuel drain l i ne (1) at the drain mast (2) . (b) Disconnect the fuel drain lines (3) at the check valves (4) and install the plugs (5) . (c) Connect the 0-10 psi regulated dry-a i r source and the manometer to the drain line (1 ). (d) On the forward spar of the tail tank , install a cap on the fill valve controller shroud can vent (6) . CAUTION : DO NOT PRESSURIZE THE SHROUD DRAIN LINE MORE THAN 

### 5 . 3 PSI. TOO MUCH PRESSURE CAN CAUSE DAMAGE TO THE SHROUD DRAIN LINE. (e) Pressurize the system to 4 . 5-5 .0 psi. (f) Close the a i r supply valve and monitor the a i r supply gage for the shroud drain system pressure decrease . 1) The pressure decrease must not be more than 1 .0 psi in 

### 5 minutes. (g) Release the system pressure . (h) Disconnect the regulated dry-air source and the manometer from the drain line (1 ) . (i) On the forward spar of the tail tank remove the cap from the fill valve controller shroud can vent (6). (j) Remove the plugs (5) from the drain lines (3). Connect the dra i n lines (3) to the check valves (4) . (k) Connect the fuel drain line (1) to the drain mast (2) . POST MD11-28A056 OR POST MD11-28-115 ( 1) Do a pressure test of the tai l tank fuel shroud drain system as follows: (Sheet 8 or 9 of 9)

APPENDIX B: PRESSURE TEST OF THE TAIL TANK FUEL SHROUD DRAIN SYSTEM (SHEET 2 OF 9) Original Issue: August 29 , 2014 Export Co ntr olled E CCN : 9 E99 1 -BO E I N G PRO PR I ETARY- Copyrigh t C> U n pu blished Work - See page 1 fo r details . MD11-28A148 36 of 46

### ALERT BOEING SERVICE BULLETIN MD11-28A148 ALERT POST MD11-28-115 NOTE: This procedure examines only the system downstream of the check/drain valve . Additional pressure tests are necessary to examine the drains which are now isolated by the one way check/drain valve . 

### POST MD11-28A056 OR MD11-28-115 (a) In the aft fuselage, disconnect the tail tank fuel drain line (1) at the drain mast (2) . (b) Disconnect the in-line tee (3) upper fuel drain line (4) and cap the opening on the i n-line tee (3). (c) Connect the 0-10 psi regulated dry-air source and the manometer to the disconnected fuel drain line (1) located near the drain mast (2) . (d) On the forward spar of the tail tank, install a cap on the fill valve controller can vent (6) . 

### POST MD11-28-115 NOTE : Because of a dra i n/check valves , it possibly is not necessary to install the cap . 

### POST MD11-28A056 OR MD11-28-115 CAUTION : DO NOT PRESSURIZE THE SHROUD DRAIN LINE MORE THAN 5.3 PSI. TOO MUCH PRESSURE CAN CAUSE DAMAGE TO THE SHROUD DRAIN LINE . (e) Pressurize the system to 4 .5-5.0 psi. (f) Momentarily open the tail tank fuel drain valve (6) at poppet slot (7) to make sure air goes out. (g) Close the air supply valve and monitor the air supply gage for the shroud drain system pressure decrease . 1) The pressure decrease must not be more than 1 .0 psi in 5 minutes . (h) Release the system pressure . (i) Push up and turn the poppet slot (7) 90 degrees to lock open . Let air flow from the tail tank fuel drain valve (6) for a 15 minutes or more to remove water. 

### U) Disconnect the regulated dry-air source and the manometer from the drain lin e (1 ) . (k) Remove the cap on the in-line tee (3) and connect the upper drain line (4) to the opening on the in-line tee (3) . (I) Remove the cap on the fill valve controller can vent (5) . 

### APPENDIX B: PRESSURE TEST OF THE TAIL TANK FUEL SHROUD DRAIN SYSTEM (SHEET 3 OF 9) Original Issue : August 29 , 2014 Export Co ntroll ed E CC N : 9E991 • BO EIN G PRO PRIETARY· Copyright C Unpublis hed Wo rk • See page 1 fo r detai ls. MD11-28A148 37 of 46ALERT BOEING SERVICE BULLETIN MD11-28A148 ALERT 

### (m ) Close the poppet slot (7) . (n) Connect the fuel drain line (1) to the drain mast (2) . e . Job Clo se -up - Tail Tank Fue l Sh roud Dra in System Pressure Test (1) Close this access panel : Number Name/Location 

### 3 1 6AB AFT FUSELAGE (2) Remove all the tools and equipment from the work area . Make sure that the area is cl e an .

APPENDIX B: PRESSURE TEST OF THE TAIL TANK FUEL SHROUD DRAIN SYSTEM (SHEET 4 OF 9) 

### Origi nal Iss ue : Augu st 29 , 2014 E xpo rt Co ntrolled E CC N : 9 E 99 1 • BO EI NG PRO PR I E TARY · Copy rig ht !C) U n pub l ished Work • See pag e 1 fo r d etail s . 

### MD 1 1-2 8A14 8 3 8 of 46

### ALERT

C H ECK VA LV E D R AIN LIN E STA Xch=-20 . 0 0 

### BOEING SERVICE BULLETIN MD11-28A148

STA Xch=-1 0 .00 STA Xch =O. OO STA Xch=20. 0 0 STA Xch=20 . 00 

### ALERT

CLAMP

ti I I k**~~** 

# A-A ( LOOKIN G A FT AT TAI L TA NK F RONT SPA R) TAIL TA NK FRON T S PA R LI NE CONNECT IO N S PRE MD11-28A056



### APPENDIX B: PRESSURE TEST OF THE TAIL TANK FUEL SHROUD DRAIN SYSTEM (SHEET 5 OF 9) Origi nal Issue: August 29, 20 1 4 Export Controlled E CC N : 9 E991 -BOE IN G PROPRIETARY- Copyright C> Unp ublis hed Work - See page 1 for details. MD11-28A148 39 of 4 6ALERT

STA Xch=-20 .00 BOEING SERVICE BULLETIN MD11-28A148

STA Xch=-10 .00 STA Xch= O .OO STA Xch=20 . 00 STA Xch=20 .00 

# -----,**~·**

# ~

A-A ( LOOKI NG AFT AT TAIL TANK FRONT SPAR) TAIL TANK FRONT SPAR LINE CONNECTIONS POST MD11-28A056

APPENDIX B: PRESSURE TEST OF THE TAIL TANK FUEL SHROUD DRAIN SYSTEM (SHEET 6 OF 9) ALERT

CAP



### Original Issue : August 29, 2014 Export Controlled ECCN : 9E991 - BOEING PROPRIETARY- Copyright IC) Unpubli shed Work - See page 1 for details. 

### MD11-28A148 40 of 46

### BOEING SERVICE BULLETIN MD11-28A148 ALERT 

# 5 v**·**

TA I L F ILU ISOL VALV E S HROUD CAN 

# L

_

____ 

# J

I 

# 3 /f!

A-A 6

FORWARD SPAR OF TAIL TANK

TA IL TA NK S HROU D SYST EM- PRE SS URE T EST PRE MD11 -28A056 OR PRE MD11 -28-115 

### ALERT

APPENDIX B : PRESSURE TEST OF THE TAIL TANK FUEL SHROUD DRAIN SYSTEM (SHEET 7 OF 9) O ri g i na l Issue : Aug ust 29 , 2014 Export Controlled E CCN : 9 E 99 1 -BOEI NG PROPR IETA R Y -**Cop yrig** **~** Un pu blished Work - See page 1 for details . MD 1 1-28A148 41 of 4 6ALERT

TA IL FILU ISO L VALVE SHRO U D CAN

TAI L TANK RIG HT TRANSFER PUMP BOEING SERVICE BULLETIN MD11-28A148

INSTALL CA P HERE



# A-A 4 3 

# 8-8 5 TAIL FILL S/0 CONTROLLER SHROUD CAN

FORWA R D SPA R OF TAI L TANK 

# r--------, I 0 0 

# lQJ----l_ l

TA IL TANK S HRO UD SYST EM - PRESSURE TEST POST MD11·28A056 OR POST MD11·28-115 TAIL TANK ALT PUMP TA IL TANK LEFT TRAN SFER PUMP ALERT

APPENDIX B: PRESSURE TEST OF THE TAIL TANK FUEL SHROUD DRAIN SYSTEM (SHEET 8 OF 9) 

### Origi na l Iss ue : August 29, 2014 Export Controlled ECCN : 9 E99 1 - BOEIN G PROPRIETARY · Co pyrigh t C Unpubli shed Work • See page 1 for details . 

### M D11-28A148 42 of 46

### BOEING SERVICE BULLETIN MD11-28A148 ALERT

TAIL FILU IS OL VALV E S HRO UD CA N

TAIL TA NK RI G HT TRA NSFER P U MP INST ALL CAP HER E



# A-A 4 3 

## 8-B 5

FORWARD SPAR O F TAIL T A N K

TA IL TANK S HR O UD SYSTEM - PR ESS URE T EST POST MD11-28A056 AND PRE MD11-28-115 

### r--- - l I 0 0 

# lQN__ I T AIL TANK A LT PU MP TAIL TANK L E FT T RANSFER P U M P 

### ALERT

APPENDIX B : PRESSURE TEST OF THE TAIL TANK FUEL SHROUD DRAIN SYSTEM (SHEET 9 OF 9) O rig i na l Issue : A u g u st 29, 2014 Export Controlled ECCN : gEgg1 -BOEI NG PROPR I ETARY - Copyright @ Unpubli shed Work - See page 1 ror details. MD11-28A148 

### 43 of 

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### BOEING SERVICE BULLETIN MD11-28A148 ALERT ALERT POST MD11-28-115 1 . PRESSURE TEST OF THE AFT FUSELAGE FUEL SHROUD DRAIN SYSTEM a . References REFERENCE TITLE MD - 11 AMM 28-25-06-000-802 REMOVAL OF THE FUEL SHROUD DRAIN LINE CHECK/DRAIN VALVE MD - 11 AMM 28-25-06-400-802 INSTALLATION OF THE FUEL SHROUD DRAIN LINE CHECK/DRAIN VALVE b . Access Panels Number Name/Location 

### 316AB AFT FUSELAGE c . Job Set-up Information- Aft Fuselage Fuel Shroud Dra in System Pres s ure Test (1) Fi x tures , Tools, Test and Support Equ i pment Equivalent replacements are permitted for the item s that follow . REFERENCE DESIGNATION Not spe cified Ladder or work platform 7 ft minimum Not specified Ladder or work platform 12ft minimum DZZ7379-501 Tester, fuel tank and drain shroud system Not specified Dry air source , regulated 6 .0 psi, minimum d. Job Set-up- Aft Fu selage Fuel Shroud Dra in System Pre ss ure Test ( 1) Open this access panel: Number Name/Location 

### 316AB AFT FUSELAGE e . Procedure- Aft Fuselage Fuel Shroud Drain System Pressu re Test (1) Pressure test the aft fuselage fuel shroud drain system (Sheet 3 of 3) as follows:

APPENDIX C : PRESSURE TEST OF THE AFT FUSELAGE FUEL SHROUD DRAIN SYSTEM (SHEET 1 OF 3) Original I ss ue: August 29, 2014 Export Controlled E CCN : 9 E 991 -BO EIN G PRO P R IETARY- Copyright C Unpublis h ed Work - See page 1 for details . 

### MD11-28A148 44 of46

### ALERT BOEING SERVICE BULLETIN MD11-28A148 ALERT WARNING: 

### MAKE SURE YOU OBEY ALL SAFETY PRECAUTIONS AND REGULATIONS DURING FUEL SYSTEM MAINTENANCE. THIS WILL PREVENT INJURY TO PERSONS AND DAMAGE TO EQUIPMENT . (a) Remove the check/drain valve (1 ), refer to MD-11 AMM 28-25- 06-000-802 . (b) Connect the drain shroud tester to the drain line (2) . 1) If necessary , install a cap on the vent valve (3) . (c) Connect the regulated dry air source to the drain shroud tester . CAUTION: 

### DO NOT PRESSURIZE THE SHROUD DRAIN LINE MORE THAN 5 .3 PSI. TOO MUCH PRESSURE CAN CAUSE DAMAGE TO THE SHROUD DRAIN LINE . (d) Pres surize the system to 4 . 5-5.0 psi. (e) Close the air supply valve and monitor the air supply gage for the shroud drain syste m pressure decrease . 1) The pressure decrease must not be more than 1 .0 psi in 5 m i nutes . (f) 

### Release the system pressure. (g) Dis co nnect the regulated dry-air source from the drain shroud tester. (h) Disconnect the drain shroud tester from the drain line (2). 1) If installed, remove the cap from the vent valve (3) . (i) Install the check/d rain valve (1 ) , refer to MD-11 AMM 28-25-06-400-802 . f . Job Close-up- Aft Fuselage Fuel Shroud Drain System Pressure Test (1) Close this access panel: Number Name/Location 

### 316AB AFT FUSELAGE (2) Remove all the tools and equipment from the work area . Make sure that the area is clean .

APPENDIX C: PRESSURE TEST OF THE AFT FUSELAGE FUEL SHROUD DRAIN SYSTEM (SHEET 2 OF 3) 

### Original Issue: August 29 , 2014 Export Controlled ECCN : 9E991 - BOEING PROPRIETARY - Copyrig ht C> Unpublished Work - See page 1 for details . 

### MD11-28A148 45 of 46ALERT BOEING SERVICE BULLETIN MD11-28A148

AFT FUSELAGE FUEL SH ROUD DRAIN SYSTEM - PRESSURE TEST POST MD11-28-115 3 ALERT

APPENDIX C: PRESSURE TEST OF THE AFT FUSELAGE FUEL SHROUD DRAIN SYSTEM (SHEET 3 OF 3) Original I ssue : August 29 , 2014 Export Controlled ECCN : 9 E 991 - BO EING P ROPR IETARY- Copyrig ht C Unpublished Work - See page 1 for detail s. MD11-28A148 

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