1. Planning Information

A. Effectivity

(1) Hartzell Engine Technologies LLC (HET) P/N 410188-0019 turbine wheels with serial

numbers H120716 through H121988 are affected by this Alert Service Bulletin

(ASB).

(2) HET model TAO411 turbochargers with part number and serial number listed in Table 1

and Table 2 are affected by this ASB.

(3) HET model TAO411 turbochargers overhauled or repaired since August 29,

2012using P/N 410188-0019 T-wheel with serial numbers H120716 through H121988

are affected by this ASB.

TABLE 1 - Turbocharger Part Numbers Affected * (Field Repairs)

* For aid in identifying engine or aircraft model, see Table 3 Reference Guide.

TABLE 2 - Turbocharger Serial Numbers Affected (Factory Shipped)

2900 Selma Highway

Montgomery, AL 36108 USA

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

Alert Service Bulletin

Bulletin No. 048

Turbocharger TAO411

P/N 410188-0019 Turbine Wheel Replacement

Rev. New November 16/12 ASB 048

© 2012 - Hartzell Engine Technologies. - All rights reserved Page 1 of 8

466642-0001 466642-9001

466642-0002 466642-9002

466642-0006 466642-9006

Turbocharger P/N 466642-0001

H-PGL00031 H-PGL00090 

Turbocharger P/N 466642-0002

H-PFL00404 H-PFL00405 H-PFL00406 H-PFL00407 H-PFL00408 H-PFL00409 H-PFL00410 

H-PFL00411 H-PFL00412 H-PFL00413 H-PGL00178 H-PGL00179 H-PHL00003 H-PHL00004 

H-PHL00058 H-PHL00059 H-PHL00061 H-PHL00063 H-PHL00064 

Turbocharger P/N 466642-9002

H-PFR00525 H-PFR00526 H-PFR00527 H-PGR00175 H-PGR00176 H-PGR00177 H-PIR00109 

H-PIR00110 H-PIR00111 H-PIR00112 H-PIR00113 H-PIR00114 

Turbocharger P/N 466642-0006

H-PFL00330 H-PFL00331 H-PFL00332 H-PFL00414 H-PFL00415 H-PFL00416 H-PFL00417 

H-PFL00418 H-PFL00523 H-PFL00524 H-PGL00149 H-PGL00150 H-PGL00151 H-PGL00152 

H-PGL00153 H-PGL00154 H-PGL00155 H-PHL00005 H-PHL00006 H-PIL00132 H-PIL00133 

H-PIL00134 

Turbocharger P/N 466642-9006

H-PFR00533
CAUTION: DO NOT USE OBSOLETE OR OUTDATED INFORMATION. PERFORM ALL

INSPECTIONS OR WORK IN ACCORDANCE WITH THE MOST RECENT

REVISION OF THIS ALERT SERVICE BULLETIN (ASB). INFORMATION

CONTAINED IN THIS ASB MAY BE SIGNIFICANTLY CHANGED FROM EARLIER

REVISIONS. FAILURE TO COMPLY WITH THIS ASB OR THE USE OF OBSOLETE

INFORMATION MAY CREATE AN UNSAFE CONDITION THAT MAY RESULT IN

DEATH, SERIOUS BODILY INJURY, AND/OR SUBSTANTIAL PROPERTY DAMAGE.

REFER TO THE HET WEBSITE FOR THE MOST RECENT REVISION LEVEL OF

THIS ASB.

B. Concurrent Requirements

(1) None

C. Reason

(1) Hartzell Engine Technologies has discovered the potential for a compromised shaft to

wheel head weld for HET P/N 410188-0019 T-wheel.

(2) This condition may allow the turbocharger turbine head to separate from the shaft. This

may result in rapid reduction in or complete loss of engine power. Additionally there is

the possibility of the loss of engine oil and fire.

(3) The affected turbocharger T-wheel must be removed from service and replaced with

T-wheels outside of the affected serial number range.

(4) Regulatory action is expected.

D. Description

(1) This Alert Service Bulletin requires the removal from service of all affected HET P/N

410188-0019 turbocharger turbine wheel assemblies.

E. Compliance

(1) For turbochargers in service with affected T-wheels, compliance is required before further

flight.

(2) This Alert Service Bulletin requires the replacement of all existing inventory of affected

T-wheels. Compliance is required before installation and no later than Dec. 31, 2012.

(3) Compliance with the Accomplishment Instructions is the terminating action for this Alert

Service Bulletin.

F. Approval

(1) FAA approval has been obtained on technical data in this publication that affects type

design.

Alert Service Bulletin

Bulletin No. 048

Turbocharger TAO411 - P/N 410188-0019 Turbine Wheel Replacement

ASB 048 Rev. New November 16/12

Page 2 of 8 © 2012 - Hartzell Engine Technologies. - All rights reserved
G. Manpower

(1) Refer to aircraft or engine labor time or service manuals for estimates regarding labor

requirements. Refer to Appendix I.

(2) Negligible for return of parts in inventory.

(3) Four (4.0) man hours of labor are required for removal and replacement of an affected

T-wheel from a turbocharger.

H. References

CAUTION: DO NOT USE OBSOLETE OR OUTDATED INFORMATION. PERFORM ALL INSPECTIONS

OR WORK IN ACCORDANCE WITH THE MOST RECENT REVISION OF A DOCUMENT.

(1) HET 400600-0000 Turbocharger Overhaul & Maintenance Manual

(2) Applicable Continental Motors or Lycoming engine maintenance manuals

(3) Applicable aircraft maintenance manuals

I. Other Publications Affected

(1) None

J. Weight and Balance

(1) Not affected

2. Material Information

(1) One each, repaired or replacement turbocharger shown in Table 1 as applicable to your

turbocharger.

(2) One each, replacement Turbocharger T-wheel, HET P/N 410188-0019.

Alert Service Bulletin

Bulletin No. 048

Turbocharger TAO411 - P/N 410188-0019 Turbine Wheel Replacement

Rev. New November 16/12 ASB 048

© 2012 - Hartzell Engine Technologies. - All rights reserved Page 3 of 8
3. Accomplishment Instructions

WARNING: THIS PROCEDURE MUST BE PERFORMED BY COMPETENT AND QUALIFIED PERSONNEL

WHO ARE FAMILIAR WITH ENGINE AND AIRFRAME MAINTENANCE THAT IS SPECIFIC TO

THE TURBOCHARGING SYSTEM. FAILURE TO DO SO MAY RESULT IN ECONOMIC LOSS,

EQUIPMENT DAMAGE, AND/OR PHYSICAL INJURY.

CAUTION: DO NOT USE OBSOLETE OR OUTDATED INFORMATION. PERFORM ALL INSPECTIONS OR

WORK IN ACCORDANCE WITH THE MOST RECENT REVISION OF THIS ALERT SERVICE

BULLETIN (ASB) AND THE APPLICABLE AIRCRAFT, ENGINE AND/OR HET 400600-0000

MAINTENANCE MANUAL. INFORMATION CONTAINED IN THESE MANUALS OR THIS

ASB MAY BE SIGNIFICANTLY CHANGED FROM EARLIER REVISIONS. FAILURE TO

COMPLY WITH THIS ASB OR THE USE OF OBSOLETE INFORMATION MAY CREATE AN

UNSAFE CONDITION THAT MAY RESULT IN DEATH, SERIOUS BODILY INJURY, AND

SUBSTANTIAL PROPERTY DAMAGE. REFER TO THE APPLICABLE AIRCRAFT, ENGINE,

AND/OR THE HET 400600-0000 MAINTENANCE MANUAL INDEX FOR THE MOST

RECENT REVISION LEVEL OF THE PUBLICATION.

A. Inspection

CAUTION: DO NOT RELY ON THE AIRCRAFT OR THE ENGINE PAPERWORK ALONE WHEN

IDENTIFYING THE TURBOCHARGER SERIAL NUMBER.

(1) If needed, access the aircraft turbocharger in accordance with the instructions contained

in the aircraft maintenance manual.

(2) Locate the turbocharger part number and serial number found on the data plate and

determine if it is an affected part number and/or serial number. Refer to Table 1 & 2.

(a) If the turbocharger serial number is not listed in Table 2 and an overhaul or

repair has not been performed since August 29, 2012, proceed to “Return to

Service” 3.C.(3).

(b) If the serial number is listed in Table 2, continue with Corrective Action 3.B(1).

(c) If the turbocharger was overhauled or repaired between August 29, 2012 and

November 16, 2012 and the HET P/N 410188-0019 T-wheel was replaced, then

determine if the serial number etched on the T-wheel shaft is affected. This may be

done by removing the oil drain fitting and with adequate lighting, observing the

shaft. (see Fig. 1).

(i) If an affected serial number is found, continue with Corrective Action 3.B(1).

(ii) If an affected serial number is not found, reconnect the oil drain fitting per

applicable aircraft and/or engine manufacturer’s maintenance manuals or

service instructions. Proceed to “Return to Service” 3.C.(3).

(3) Identify affected T-wheel Piece Part

(a) Examine the turbocharger T-wheel by observing serial number etched on the T-wheel

shaft. If a serial number is found in the range of H120716 through H121988, the

T-wheel is affected. If found in inventory as piece part or as part of a complete

turbocharger assembly, continue with Corrective Action 3.B(3).

Alert Service Bulletin

Bulletin No. 048

Turbocharger TAO411 - P/N 410188-0019 Turbine Wheel Replacement

ASB 048 Rev. New November 16/12

Page 4 of 8 © 2012 - Hartzell Engine Technologies. - All rights reserved
B. Corrective Action:

(1) If it has been determined that an affected T-wheel is installed:

(a) The turbocharger must be removed and suitable arrangements made to replace the

T-wheel or turbocharger. Remove in accordance with the applicable aircraft and/or

engine manufacturer’s maintenance manuals or service instructions. If returning

the turbocharger to HET, do not send with fittings, oil reservoir, or other engine

or airframe parts as they cannot be returned.

(2) Return any affected turbocharger T-wheel HET P/N 410188-0019 within thirty (30) days

from the date of this Alert Service Bulletin. Refer to 1.A.(1).

(3) Prior to installation of a repaired turbocharger, please check that the unit is received in

undamaged condition with proper paperwork.

(4) Utilizing the applicable aircraft and/or engine manufacturer’s maintenance manuals

or service instructions, re-install the turbocharger assembly and proceed to

“Return to Service”.

C. Return to Service

(1) After the turbocharger has been properly installed, the aircraft will be ready for “return to

service”.

(2) Perform the recommended turbocharger operational tests in accordance with Hartzell

Engine Technologies Service Bulletin 023.

(a) The operational tests consist of turbocharger pre-lubrication, ground running tests,

and operational flight test.

(b) Make sure air, exhaust, or oil leaks are not present.

(3) Using the applicable aircraft and engine manufacturer's maintenance manuals of the

latest revision, install any portion of the aircraft that was removed to gain access.

D. Upon successful completion of this Alert Service Bulletin per the applicable compliance listed, make an appropriate log book entry noting compliance with this Alert Service Bulletin as

terminating action.

Rev. New November 16/12 ASB 048

© 2012 - Hartzell Engine Technologies. - All rights reserved Page 5 of 8

Alert Service Bulletin

Bulletin No. 048

Turbocharger TAO411 - P/N 410188-0019 Turbine Wheel Replacement
Alert Service Bulletin

Bulletin No. 048

Turbocharger TAO411 - P/N 410188-0019 Turbine Wheel Replacement

ASB 048 Rev. New November 16/12

Page 6 of 8 © 2012 - Hartzell Engine Technologies. - All rights reserved

4. Contact Information:

A. All communications regarding this ASB, must be placed either through Hartzell Engine

Technologies Technical Support at (334-386-5441 or (888) 461-6077, for international calling

+1 (334-386-5441. If by Fax use (334) 386-5450.

B. Written communications must be placed through Hartzell Engine Technologies Technical

Support, 2900 Selma Highway, Montgomery, AL 36108, USA.

C. If E-mail communication is desired, go to our website:http://www.hartzellenginetech.com and

select "contact" and follow the instructions.

D. If returning the T-wheel or turbocharger for repair or replacement, refer to Appendix 1.
Alert Service Bulletin

Bulletin No. 048

Turbocharger TAO411 - P/N 410188-0019 Turbine Wheel Replacement

ASB 048 Rev. New November 16/12

Page 7 of 8 © 2012 - Hartzell Engine Technologies. - All rights reserved

Turbocharger P/N Engine Model Engine P/N Aircraft Models

466642-0001 TSIO-360-MB, -SB 649151-1 (CMI) Mooney Encore

466642-9001 TSIO-360-MB, -SB 649151-1 (CMI) Mooney Encore

466642-0002 TSIO-360-RB 649151-2 (CMI) Piper Seneca V - PA34-220T

466642-9002 TSIO-360-RB 649151-2 (CMI) Piper Seneca V - PA34-220T

466642-0006 TIO-540-AK1A (LYC) 46C22924 (LYC) Cessna T182T 

466642-9006 TIO-540-AK1A (LYC) 46C22924 (LYC) Cessna T182T 

Table 3 - Aircraft / Engine Reference Guide*

Figure 1 - Typical View of T-wheel S/N

Through Turbocharger Oil Drain Port

* Use for reference purposes only. Aircraft/engines listed are inclusive of but not limited to these models.

Oil Drain

Port

Shown with

Turbine Housing

Removed 

View the T-wheel S/N on the

shaft thru Oil Drain Port

410188-0019

T-wheel 

Note:

Affected HET P/N T-wheels have S/N on the shaft.
Alert Service Bulletin

Bulletin No. 048

Turbocharger TAO411 - P/N 410188-0019 Turbine Wheel Replacement

Rev. New November 16/12 ASB 048

© 2012 - Hartzell Engine Technologies. - All rights reserved Page 8 of 8 

Intentionally Left Blank