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Stafiej Tomasz
od: Boeing Customer Support
Wystano: 3 maja 2019 19:15
Temat: Information - Use of biocide Kathon FP 1.5 with procedural deviations from AMM.
28-10-00-600-802
FROM: THE BOEING COMPANY
TO: Boeing Correspondence (MOM)
[MESSAGE NUMBER:MOM-MOM-19-0264-018] Multi Operator Message
MESSAGE DATE: 03 May 2019 1014 US PACIFIC TIME / 03 May 2019 1714 GMT
This message is sent to all 737 -8/9 Customers, Airline Resident Representatives, Regional Directors, Regional
Managers and Boeing Field Service Bases.
CATEGORY: Publications/Manuals
SERVICE REQUEST ID: 4~4475896124
ACCOUNT: Boeing Correspondence (MOM)
DUE DATE: (02-May-2019 23:59
PRODUCT TYPE: Maint. and Repair Document
PRODUCT LINE: 737
PRODUCT: ‘AMM (737-7/8/8200/9) Part Il Aircraft Maintenance Manual
ATA:
SUBJECT: Information - Use of biocide Kathon FP 1.5 with procedural deviations from AMM 28-10-00-600-802
REFERENCES:
/A/ 737MAX-FTD-28-17001
/8/ AMM 28-10-00
/C/ AMM 10-11-07
SUMMARY:
‘The proper concentration of biocide in the fuel tank can help to ensure that microbial growth is managed during
storage and that no related damage and/or abnormal operation to the fuel system, engines, or APU will occur when
the airplane is returned to service. If an operator has injected the biocide Kathon FP 1.5 without strictly following
the AMM procedure as documented they are strongly encouraged to contact Boeing Service Engineering via service
request for guidance to ensure the successful airplane return to service.
DESCRIPTION:
‘The proper concentration of biocide in the fuel tank can help to ensure that microbial growth is managed during
storage and that no related damage and/or abnormal operation to the fuel system, engines, or APU will occur when
the airplane is returned to service. A low biocide concentration may not effectively inhibit microbial growth whereas
‘@ high concentration (exceeding maximum allowed in aviation fuels) surpasses limits accepted by Boeing and engine
manufacturers and may have adverse effects on the fuel tanks, fuel tank components, and airplane / engine
operation. Boeing notes that an injection cart process, as described in AMM 28-10-00-600-802, is an effective method for
mixing biocide with fuel at the approved concentration levels. The purpose of the injection cart is to meter the
proper amount of the biocide into the fuel as the fuel is being uploaded into the airplane. Again, this method is used
‘to make sure sufficient mixing of the biocide with the fuel is accomplished at the approved concentration level.
Boeing very strongly advises against any other biocide application methods without first consulting with Boeing and
recommends that operators refer to 737MAX-FTD-28-17001 Fleet Team Digest for additional information regarding
Biocide and Engine Operational Issues.
There are two approved biocides allowed for use on Boeing airplanes, Biobor and Kathon 1.5. When using Kathon FP
1.5, per AMM 28-10-00-600-802, Boeing recommends that 3 gallons of fuel be drained from the sump drain valve
from each fuel tank prior to returning the aircraft to service. A temporary revision to the AMM will be sent to = I
‘this change, no later than May 9 2019. - ed
oO
Boeing recommends that operators do not add Biocide if the method described in AMM 28-10-00-600-802 cannot
be accomplished as documented. In cases when AMM 28-10-00-600-802 cannot be accomplished for long term
storage, follow the frequent sumping task associated with active storage, per AMM 10-11-07, which will help
minimize the risk of a developing a microbial infestation.
If an operator has injected the biocide Kathon FP 1.5 without strictly following the AMM procedure as documented
they are strongly encouraged to contact Boeing Service Engineering for guidance to ensure the successful airplane
retum to service.
If attachments are referred to, and are not present, please access them by logging into MyBoeingFleet Service
Requests application. If you have further questions, you may contact the appropriate Airline Support Manager.
Service Request System : https://myboeingfleet. boeing.com/bsrs/client/index.htmli/momDetall/4-220M6A9
(Note: MyBoeingFleet portal login is required to access link in the Service Request System)
Eduardo Castro, Senior Manager
Airplane Maintenance Engineering
Eric Ward, Senior Manager
Propulsion, Environmental & Payloads Systems Customer Support The Bo Line
LEAP-AIl - Fuel biocide treatment process (19-05-7300-02)
Roference: LEAP All Operators Wire (19-LEAP-813), May 7, 2019,
Te purpose of tis article, and of the referenced All Operators Wire
(AOW), is to highlight recent industry experience and the potential
impact to CFMS6 and LEAP engines resulting from improper biocide
‘treatments.
Recent industry experience indicates improper application ofthe
fuel system biocide treatment procedure could result lose of
thrust control and/or IFSD, with potential to concurrently impact
multiple engines on the same aircraft. Improper application includes
factors suchas over-concentration, application method and timing
betwen fel sampling ané biocide treatment.
leis extremely important that maintenance teams apply the
published procedures correctly. CFM recommends that airlines and
‘operators should 1) confirm the maintenance work instructions are
consistent withthe airframer AMM, and 2) ensure maintenance
teams understand the procedure andre properly trained. Ths wll
help protect engine operation and avoid potential issues.
information gatherin
CCFMisinterested in gathering operator experience with fuel
biocides. CFM Customer Teams willbe contacting customers to
collect this informatio. If not contacted, please forward your fleet
‘experiance with biocides, including frequency of use, name of biocide
product used and any negative experience to:
_viationfleetsupaort@ge.com (INC customers)
Crriclln sas
(5A customers)
grou
Question
fan operator requires any clarifications while implementing the
biocide procedures described inthe Airframer AMM, please contact
‘the airframer. For further questions regarding this article/AQW,
please contact Fleet Support or the CFM Custemer Suppart Center
(csc)
LEAP-All - Fuel biocide treatment process with Kathon FP1.5 (19-05-7300-03)
Re
ne: LEAP All Operators Wire 9-LEAP-815), May 28, 2019
The purpose ofthis article, and of the referenced All Operators Wire
(AOW isto follow-up on AOW 18-CFMSE-612 and AOW 19-LEAP-
813, CFMis ware hat the recent industry experience of adverse
operational events has only been associated with ual biocide,
Kathon FPS (Kethon’] when inadvertently misapplied
Until full evaluation ofthe improper application of Kathon is
complete, CFM recommends operators to use alternative certified
biocidal fuel aditives or alternative AMM procedures to remove
‘microbial growth as methods to control fuel system micro
organisms,
IF Kathon isthe only product avalable to an operator to remove
confirmed microbiological contamination, CFM recommends the
‘operator to contact the sirframer to assure thelr process is
consistent with the latest airframer recommendations in terms of
Kathon concentration, delivery method and quality control of the
process
Ian operator suspects to have recently inadvertently misapplied
Kathon biocide, CFM's recommendations te contact the airframer
Aiectly for guidance on steps to return the aircraft ta service, CFM
will continue to support the airfremers in this evaluation.
For questions regerding impact on engine operation please contact
Fleet Supporto the CFM Customer Support Center (CSC). For
‘questions on airplane-leve fuel system or AMM tasks, please
contact the airframer directly.
LEAP Fleet Highites -May2019 6 Line
LEAP-All - Kathon biocide treatment (19-05-7300-01)
(On March 28, 2019, anon-CFM-pawered twin-engine airplane
experienced temporary thrust anomalies on both engines during
descent
Reports indicate that this was the second flight following Kathon FP
1 Sbiocide treatment for microbiological contamination.
‘An agency investigationis in progress including the Japan Transport
Safety Board (TSB) and US National Transportation Safety Board
(NTSB). The aircraft manufacturer and engine manufacturer are
supporting the agency investigation.
During the March event, both engines experienced speed
‘oscillations. Multiple valves inthe fuel control units showed
Increased friction andor stuck valves during disassembly. A gel-like
translucent residue was found on multiple components inthe Fuel
control units. Preliminary analysis results are consistent with
Kathon constituents
In response the following CFM All Operators Wires have b
issued:
‘All perator Wires 19-LEAP-813(5/7/19), 19-CFMS6-B12
G/7As)
+ All Operator Wires 19-LEAP-815(5/28/18).19-CFMS6-814
(sas)
In general these All Operators Wires communicated the following:
Until a full evaluation of the improper application of Kathon
(including but not limited to procedure & equipment] is
complete, CFM's recommendation s to use Biobor Fuel Biocide
for treatment of fuel tanks until further notice ~ if Kathon is the
‘only option available, CFM recommends contacting the aircraft
‘manufacturer to ensure proper application practices are
followed. CFM supports the use of alternative certified biocidal
fuol additives or alternative AMM procedures to remove
‘microbial growth as methods to control fuel system
microorganisms.
CCFMis aware of seven similar avents inthe past five years with
Kathon misapplication.
+ Pleasereportallsinilar events x history of similar events.
+ Experience indicates problems were associated with misapplication
of Kathon. Nokrownissues with property applied Kethon or BioBor.
‘+ Experience on multiple engine and airframe programs includes:
© Inability to start the engines
© Engine tallpipe fires
© Fuelflow and engine speed osclations
© lnabilty to contol thrust
= CFM is working with ircrafe manufacturers te identify AMM
procedure updates
+ CFMis working with IATA andother industry teams to share
experience
‘This recommendation for using only Biobor Fuel Biocide for
‘treatment of fuel tanks is expected tobe temporary. Future
recommendation of Kathon Fuel Biocide depends on favoreble
+ Completion of ab andrg testing of Fel system components and
fuel/Kathon mixtures tobetter understand mixing variation and
process sensitivity.
+ Development oF improved AMM procedures to incresserobustness
of process.
Summery
‘An agency investigation{s in progress concerning temporary thrust
anomalies on bth engines ofa two-ongine aircraft during descent
shortly after biocide treatment.
(CFM recommends that airlines and operators:
Folio the engine program specific recommendations provided by
AllOperatars Wires.
Confirm the maintenance work instructions for any Blocide
treatments consistent with themast recent areraFt manufacturer
aM,
3. Ensuremaintenance teams completely understand the procedure
and are propery trainee
LEAP Fleet Highites -May2019 5 Line
CFMS56-All - Kathon biocide treatment (19-05-7300-01)
On March 28, 2019, a non-CFM-powered twin-engine airplane
experienced temporary thrust anomalies on both engines during
descent.
Reports indicate that this was the second flight follwing Kathon FP
1 Sbiocide treatment for microbiological contamination,
An agency investigations in progress including the Japan Transport
Sefety Board (JTSB) and US National Transportation Safety Board
(NTSB), The sireraft manufacturer and engine manufacturer are
supporting the agency investigation.
During the March event, both engines experienced speed
oscillations. Multiple vaives inthe fuel contro urits showed
Increased fiction and/or stuck valves during disassembly. & gel-like
translucent residue was found on multiple components inthe fuel
control units. Preliminary analysis results are consistent with
Kathon constituents
In response, the following CFM All Operators Wires have been
issued:
[Nl Operator Wires 19-CFMS6-812 5/7/29), 19-LEAP-B13
(5/73)
= AllOperator Wires 19-CFMS6-€14 (5/26/19), 19-LEAP-815
(5/283)
In goneral, these All Operators Wires communicated the following:
Unt sfulvaluston ofthe improper application of Kathon
(incising but nt inited to procedure S equipment) is
complete, CFM recommendations fuse Sior Fuel acide
for raster of foe aks nt Further netic ifKethon isthe
cnly option avelbl, CFM recommends contacting the aircraft
rmanufecturer to ensure proper aplication practices are
foliones. CFM supports theuse of alternative certified biocidal
fuel additives or alternative AMM procedures to remove
cicrobial growth at methods to contral fuel system
microorgeisms.
CCFMis aware of seven similar events in the past five years with
Kathon misapplication.
Pleasereportall similar events or history of smile events.
Experience indicates problems were associated wth misapplication
‘oF Kathon. No knawnissues with properly applied Ksthon or BioBor,
Experience on multiple engin and airframe programs includes:
1 Inability to start the engines
© Enginetailpipe fies
© Fuelflow and engine speed oscilations
© tnablty to control thrust
(CFM is wocking wit aireraft menufacturers to identify AMM
procedure updates.
~ _CEMis working with IATA and other industry team to share
experience,
This recommendation for using only aber Fuel Biocide for
‘treatment of fuel tanks is expacted tobe temporary. Future
recommendation of Kathon Fuel Biocide depends on favorable:
Completion of ab and rig testing of Fuel system components end
fuel/Kathon mixtures to better understandmixing variation and
process sensitivity
Development of improved AMM procedures to increase robustness
of process.
[An agency ievestigation is in progress concerning temporary thrust
snomalies on both engines of stwo-engine aircraft during descent
shortly after biocide treatment,
-M recommends tht islines and operators:
Fellow the engine program specificrecammendstions provided by
‘Operators Wires
Confirm the maintenance war instructions fer any Biacide
‘reatmentis consistent with the most recent oireraft manufacturer
aM,
3. Ensure maintenance teams completely understand the procedure
and are properly trained.
CFMSSFleetHighites May2019 6 Line
CFM56-All - Fuel biocide treatment process (19-05-7300-02)
Reference: CFMSS All Operators Wire
‘The purpose ofthis article, ond of the referenced All Operators Wire
(AOW), is tohighight recent industry experience and the potential
impact to CFMBE and LEAP angines resulting from improper biocide
‘treatments,
Recent industry experience indicates improper application ofthe
fuel system biocide treatment procedure could result in loss of
thrust control and/or FSD, with potential to concurrently impact
multiple engines on the same aircraft. Improper application includes
factors suchas over-concentration, application method and timing,
between fuel sampling and biocide treatment.
Itis extremely important hat maintenance teams apply the
published procedures correctly. CFM recommends that artines and
‘operators should 1) confirm the maintenance work instructions are
consistent withthe sicframer AMM, and 2) ensure maintenance
teams understand the procedure and are properly trained, This
help protect engine operation and avoid potential issues.
CCFMisinterested in gathering operetor experience with fuel
biocides. CFM Customer Teams willbe contacting customers to
collect ths information. If not contacted, please forward your fleet
‘experience with biocides, including frequency of use, name of biocide
product used and any negative experience te:
ition flestsunport@ge.com (INC customers)
+ Garilcollos@safrangrove.com (SA customers)
Ifan operator requires any clarifications while implementing the
biocide procedures describedinthe Airframer AMM, please contact
the airframer. For further questions regarding tis ertcle/AOW,
please contact Fleet Support or the CFM Customer Support Center
(csc).
CFMS6-All - Fuel biocide treatment process with Kathon FP1.5 (19-05-7300-03)
Reference: CFMS6 All Operators Wire (19-CEMSE-81.), Mey 28,2019
‘The purpose ofthis article, and ofthe referenced All Operators Wire
(AOW).is te Foliow-up on AOW 19-CFMS6-812 end AOW 19-LEAP-
813, CFMis aware thatthe recent industry experience of adverse
‘operational events has only been associated with Fuel biocide,
Kathon FPLS (*Kathon") when inedvertently misap
Until 2 full evaluation of the improper application of Kathon ie
complete, CFM recommends operators touse alternative certified
biocidal fuel additives or alternative AMM procedures to remove
‘microbial growth as methods to control fuel system micro-
organisms.
I Kathon s the only product availabe to an operator to remove
confirmed microbiological contamination, CFM recommends the
operator to contact the airframer to assure their process is
consistent with the latest airframer recommendations in terms of
Kathon concentration, delivery methad and quality contral of the
process,
If an operator suspects to have recently inadvertently misapplied
Kathon biocide, CFM's recommendations t contact thea
directly for guidance on steps to return the aircraft to service. CFM
will continue to support the airframersin this evaluation.
For questions regarding impact on engine operation, please contact
Fleet Support or the CFM Customer Support Center (CSC). For
‘questions on airplane-level fuel system or AMM tasks, please
contact the sirframer directly.
CFMS6FleetHighites May2019 7
