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1. Planning Information

A. Effectivity

(1) Sky-Tec Master Contactor P/N STS-M12 manufactured by Hartzell Engine Technologies (HET) and Sky-Tec, LP.

(a) Allserialnumberswithprefix“S2M”areaffectedbythisAlertServiceBulletin.

(b) Serialnumberswithprefix“H-”priortoH-R100001areaffectedbythisAlertServiceBulletin.

(2) Sky-Tec Master Contactor P/N STS-M24 manufactured by HET and Sky-Tec, LP.

(a) Allserialnumberswithprefix“S2M”areaffectedbythisAlertServiceBulletin.


(3) WheninstalledastheMasterContactor,Sky-TecAuxiliaryContactorP/NSTS-A12manufactured by HET and Sky-Tec, LP.

(a) Allserialnumberswithprefix“S2A”areaffectedbythisAlertServiceBulletin.


(4) WheninstalledastheMasterContactor,Sky-TecAuxiliaryContactorP/NSTS-A24manufactured by HET and Sky-Tec, LP.

(a) Allserialnumberswithprefix“S2A”areaffectedbythisAlertServiceBulletin.


(5) AllaircraftlistedunderMasterContactorSTS-M12&M24andAuxiliaryContactorSTS-A12&A24PMASupplement29areaffectedbythisAlertServiceBulletin.PMAinformation can be found on the HET website, http://hartzell.aero/pmaunder“Starters”

(6) All contactors listed under 1.A.(1) through 1.A.(4) used on aircraft notidentifiedbyPMASupplement29areaffectedbythisAlertServiceBulletin.

NOTE: “PartNumber”and“ModelNumber”areusedaslike-termsinthisAlertServiceBulletin.

2900 Selma HighwayMontgomery, AL 36108 USA

Tel: 334-386-5400 Fax: 334-386-5450

Rev.New:October11/17 ASB 072©2017-HartzellEngineTechnologies-Allrightsreserved of 6

ALERT SERVICE BULLETIN

Alert Service Bulletin No. 072

Master Contactor Replacement

http://hartzell.aero/pma/?selection=starters

WARNING: DONOTUSEOBSOLETEOROUTDATEDINFORMATION.PERFORMALLINSPECTIONSORWORKINACCORDANCEWITHTHEMOSTRECENTREVISIONOFTHISALERTSERVICEBULLETIN.INFORMATIONCONTAINEDHEREINMAYBESIGNIFICANTLYCHANGEDFROMEARLIERREVISIONS.FAILURETOCOMPLYWITHTHISALERTSERVICEBULLETINORTHEUSEOFOBSOLETEINFORMATIONMAYCREATEANUNSAFECONDITIONTHATMAYRESULTINDEATH,SERIOUSBODILYINJURY,AND/ORSUBSTANTIALPROPERTYDAMAGE.REFERTOTHEHETWEBSITE,WWW.HARTZELL.AERO,FORTHEMOSTRECENTREVISIONLEVELOFTHISALERTSERVICEBULLETIN.

B. ConcurrentRequirements

(1) None

C. Reason

(1) AdesigndeficiencyintheMasterContactormaycausealossofcontactorfunctionwhencycled, resulting in loss of aircraft electrical power.

D. Description

(1) ThisAlertServiceBulletinprovidesInstructionsforContinuedAirworthiness(ICA).

(2) ThisAlertServiceBulletinprovidesinstructionsforreplacementofaffectedHETMasterContactorpartnumbersSTS-M12orSTS-M24andaffectedHETAuxiliaryContactorpartnumbers STS-A12 or STS-A24 when installed as the Master Contactor.

E. Compliance

(1) IMMEDIATE-DonotcyclemasterpowerswitchduringflightunlessrequiredbyPOH.Ifmaster power switch is cycled and loss of electrical power occurs, cycle master power switch repeatedly until power is recovered.

(2) Atthenextscheduledmaintenanceintervalorwithinthenexttwelve(12)months,whicheveroccursfirst,replaceaffectedMasterorAuxiliaryContactorwithonenotaffectedbythisAlertServiceBulletin.

F.Approval

(1) FAAacceptancehasbeenobtainedonthetechnicaldatainthispublicationthataffectstype design.


ALERT SERVICE BULLETINAlert Service Bulletin No. 072



G.Manpower

(1) Uptoone(1.0)hourlaborisrequiredforreplacementandReturntoServicewhenperformed in conjunction with regularly scheduled maintenance inspection.

H. References

(1) ApplicableaircraftPOHorAFM

(2) Aircraft maintenance manual (as applicable).

I. WeightandBalance

(1) No Change

2.MaterialRequired

A. FAAapprovedMasterContactorwithpartnumbernotaffectedbythisAlertServiceBulletin.

3. Accomplishment Instructions

WARNING 1: THISPROCEDUREMUSTBEPERFORMEDBYCOMPETENTANDQUALIFIEDPERSONNELWHOAREFAMILIARWITHTHEAIRFRAMEELECTRICALSYSTEMMAINTENANCE.FAILURETODOSOMAYRESULTINPHYSICALINJURY,EQUIPMENTDAMAGEAND/ORECONOMICLOSS.

WARNING 2: DONOTUSEOBSOLETEOROUTDATEDINFORMATION.PERFORMALLINSPECTIONSORWORKINACCORDANCEWITHTHEMOSTRECENTREVISIONOFTHISALERTSERVICEBULLETIN.INFORMATIONCONTAINEDHEREINMAYBESIGNIFICANTLYCHANGEDFROMEARLIERREVISIONS.FAILURETOCOMPLYWITHTHISALERTSERVICEBULLETINORTHEUSEOFOBSOLETEINFORMATIONMAYCREATEANUNSAFECONDITIONTHATMAYRESULTINDEATH,SERIOUSBODILYINJURY,AND/ORSUBSTANTIALPROPERTYDAMAGE.REFERTOTHESKY-TECWEBSITEFORTHEMOSTRECENTREVISIONLEVELOFTHISALERTSERVICEBULLETIN,WWW.SKYTEC.AERO.

CAUTION: REFERTOTHEAPPLICABLEMANUFACTURER’SMAINTENANCEMANUALSORSERVICEINSTRUCTIONSTOGAINACCESSTOTHEAIRFRAMEORCONTACTOR.INADDITION,ANYPREFLIGHTORIN-FLIGHTOPERATIONALCHECKSREQUIREUSEOFTHEAPPROPRIATEAFMORPOH.




A. MasterContactorIdentification

(1) IfpositiveidentificationoftheMasterContactormodel/partnumbercanbemadethroughthe aircraft documentation, and the Master Contactor is affected per 1.A, continue to “AccomplishmentInstructions,Replacement”3.B.(1).

(2) Ifpositiveidentificationcannotbemadethroughaircraftdocumentation,gainaccessandlocatethedatatagontheMasterContactortoverifyeffectivity.RefertoFigure-1 for data tagillustration.IfMasterContactorisaffectedper1.A.,continueto“AccomplishmentInstructions,Replacement”3.B.(1).

B. Replacement

(1) Atthenextplannedmaintenanceintervalorwithinthenexttwelve(12)months,whicheveroccursfirst,replaceaffectedMasterContactorwithonenotaffectedbythisAlertServiceBulletininaccordancewiththeapplicableaircraftmaintenancemanualand/orserviceinstructionsandcontinueto“ReturntoService”3.C.(1).

(a) RefertoFigure-2 for replacement contactor illustration. Sky-Tec Contactor P/N STS-M12andSTS-M24withserialnumberH-R10001andlaterwillcomewitharedjumperwireinstalledfromtheBatteryTerminaltotheCoilPowerTerminal.Thejumper converts a 4-terminal contactor to a 3-terminal contactor.

(b) Thisconfigurationrequiresnoalterationpriortoinstallation.UsethevacantCoilGroundTerminalforcontrolwireconnection.

C. ReturntoService

(1) Perform the recommended Master Contactor functional tests in accordance with the applicable aircraft maintenance manual, service instructions, and operational tests in the AFMorPOH.

D. MaintenanceRecord

(1) Forterminatingaction,makeanaircraftlogbookentrytoindicatecompliancewiththisAlertServiceBulletinbyreplacementoftheMasterContactor.



4. Contact Information

A. Contact HET Product Support for all communications regarding the technical content of this AlertServiceBulletin.

(1)Phone+1.334.386.5400(Option2)

(2)Fax+1.334.386.5450

(3) E-mail at [email protected]

(4) Address

Hartzell Engine Technologies LLC 2900SelmaHighway Montgomery,AL36108 USA







Affected Master Contactor. Model Number STS-M12 Shown.Figure-1

Replacement Master Contactor Figure-2

Serial Number Prior to H-R100001

Model/Part Number

1. Eligibility:

A. ALL Sky-Tec contactors affected by ASB 072.

2. Commercial Assistance Program:

A. Complete and return the attached claim form including a photo of the affected contactor data tag to HET Product Support via mail, e-mail, or fax.

B. Upon receipt of a completed ASB 072 Claim Form and photo of the affected contactor data tag, HET will ship a new design contactor not affected by ASB 072 to the address on the claim form.

C. The Commercial assistance outlined above shall expire twelve (12) calendar months from the original published date of Alert Service Bulletin 072.

3. Warranty Statement:

A. The sole warranty for the actions of ASB 072 are contained in the HET Limited Warranty Policy issued with the purchase of each new contactor (see terms and conditions therein).

B. Commercial assistance may apply as stated in this Appendix.

C. Issuance of ASB 072 in no way constitutes an implied or expressed warranty of any kind.

D. This publication does not imply or state any responsibility for the workmanship of any person or entity performing work or maintenance on the aircraft electrical system.

4. Contact Information:

A. Contact HET Product Support for all communications regarding the technical content of this Alert Service Bulletin.

(1) Phone +1.334.386.5400 (Option 2)

(2) Fax +1.334.386.5450.

(3) E-mail at [email protected].

(4) Address

Hartzell Engine Technologies LLC2900 Selma Highway, Montgomery, AL 36108USA

Rev. New: October 11/17 ASB 072© 2016 - Hartzell Engine Technologies. - All rights reserved Appendix page 1 of 2

Alert Service Bulletin AppendixAlert Service Bulletin No. 072


ASB 072 CLAIM FORM

Owner information

Name: Date: Tel: Fax:

Company Name: E-mail:

Address:

City: State: Postal Code:

Country:

Component Information Nomenclature: Part Number:

Serial Number: (Contactor) Date Removed:

Part Time in Service: (Contactor) Original Date Installed:

Send this ASB 072 Claim Form to:

Hartzell Engine Technologies Product SupportFax: +1.334.386.5450E-mail: [email protected]

Hartzell Use Only - do not write below this line.

Warranty No: Authorized by:

© 2017 - Hartzell Engine Technologies. - All rights reserved Appendix page 2 of 2

Alert Service Bulletin AppendixAlert Service Bulletin No. 072


(Include Photo of Affected Contactor Data Tag)

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