Service Bulletin - Aeroforce | Turbocharging Systems
PIPER PA31-350 Navajo Chieftain · Service Bulletins
Overview
This document is a service bulletin issued by Kelly Aerospace Power Systems regarding a potential interference issue with the turbocharger turbine exhaust outlet flange on the Piper PA31-350 Navajo Chieftain. It mandates inspection and/or replacement of affected turbocharger turbine housings to prevent exhaust leaks and potential engine damage.
- Inspection and/or replacement of turbocharger turbine housing is mandatory.
- Affected turbocharger part number is P/N 409170-0001.
- Turbocharger turbine housings manufactured between August 25, 2006, and October 12, 2007, are suspect.
- Compliance is required within 10 hours of service or at the next scheduled maintenance.
- The document includes a list of suspect serial numbers for affected turbochargers.
- Inspection must be performed by qualified personnel familiar with turbocharged aircraft.
- Warranty consideration is provided for affected turbine housings.
- Contact Kelly Aerospace for technical support regarding the bulletin.
Document
Source
Originally published by aeroforce.aero. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type ·
- Service Bulletins
- Year ·
- 2008
- File size ·
- 219 KB
- Publisher ·
- aeroforce.aero
- Language ·
- en
Specifications & performance
Extracted from this document.
Specifications
- Turbocharger part number ·
- P/N 409170-0001
- Turbine housing part number ·
- P/N 441977-25
What is the Service Bulletin - Aeroforce | Turbocharging Systems?
The Service Bulletin - Aeroforce | Turbocharging Systems is a service bulletins for the PIPER PA31-350 Navajo Chieftain, dated 2008.
Where does the Service Bulletin - Aeroforce | Turbocharging Systems come from?
This copy of the Service Bulletin - Aeroforce | Turbocharging Systems was originally published by aeroforce.aero and is hosted on Sprinkle as a free, searchable reference copy.
What year was the Service Bulletin - Aeroforce | Turbocharging Systems published?
The Service Bulletin - Aeroforce | Turbocharging Systems — the PIPER PA31-350 Navajo Chieftain service bulletins on file — is dated 2008.
Most owners only have the POH. Here's the essential set for the PIPER PA31-350 Navajo Chieftain.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins on file
- Type Certificate (TCDS)
More PIPER PA31-350 Navajo Chieftainmanuals & documents
- Navajo Chieftain Service ManualService Bulletins
- 761-487 - CHIEFTAIN PARTS CATALOGParts Catalog
- Piper Aircraft Corporation Chieftain PA31-350 Specifications/PerformancePilot's Operating Handbook
- MAINTENANCE MANUAL - PA-31-350 T1020Maintenance Manual
- Control Surface Balancing RecommendationService Bulletins
In this document
Introduction
The introduction outlines a potential interference condition between the turbocharger turbine exhaust outlet flange and the airframe exhaust tube, emphasizing the need for inspection and possible replacement of affected parts.
Compliance
Compliance with the service bulletin is mandatory and must be completed within 10 hours of service or at the next scheduled maintenance event.
Effectivity
The bulletin applies to any Piper PA31-350 Navajo Chieftain, Piper T1020, or Colemill Panther conversion using a specific turbocharger model.
Procedure
The procedure section details the steps for inspecting and potentially replacing the turbocharger turbine housing, including specific measurements and actions to take if gaps exceed tolerances.
Return to Service
Instructions for returning the aircraft to service after compliance with the bulletin are provided, including operational tests and logbook entries.
Warranty Statement
The warranty statement outlines the warranty considerations for the affected turbine housing and labor for inspection and repair.
Safety notes
- This procedure must be performed by competent and qualified personnel.
- Do not depend on this Service Bulletin for gaining access to the aircraft or engine.
- Inspect the 'V' band clamp for damage before re-use.
- Care must be taken not to damage the mating surfaces during stamping.
- Ensure no air, exhaust, or oil leaks are present after repairs.
Full document text
T TU UR RB BO OC CH HA AR RG GE ER R E EX XH HA AU US ST T F FL LA AN NG GE E IIN NS SP PE EC CT TIIO ON N A AN ND D//O OR R T TU UR RB BIIN NE E H HO OU US SIIN NG G R RE EP PL LA AC CE EM ME EN NT T INTRODUCTION: It has come to the attention of Kelly Aerospace Power Systems (KAPS) that a possible interference condition may exist between the turbocharger turbine exhaust outlet flange area and the mating flange of the airframe exhaust tube. The piloted type exhaust tube flange may contact the filet radius of the turbine housing relief cut not allowing the two flange faces to meet properly. (see Figure 3 on page 3) Turbine housings manufactured between August 25, 2006 and October 12, 2007 are suspect. If this condition exists, exhaust pipe security may be compromised. While the exhaust outlet side of the turbocharger turbine has relatively low pressures, the potential of an exhaust leak, a loosening of the “V” band clamp, and a rise of temperature within the engine cowling exist. Left uncorrected, failure of the “V” band clamp may occur with possible loss of the tail pipe connection with resultant uncontained hot exhaust gas within the engine cowl. This Service Bulletin is being issued to mandate the inspection and/or replacement of affected turbocharger turbine housing(s) P/N 441977-25 as found on KAPS turbocharger P/N 409170-0001 (Lyc LW-12463) per the serial numbers listed in the table below. COMPLIANCE: Within the next ten (10) hours time in service or at the next regularly scheduled maintenance event or annual inspection which ever occurs first. EFFECTIVITY: Any Piper PA31-350 Navajo Chieftain, Piper T1020, or Colemill Panther conversion using a 350 hp engine which utilizes a Kelly Aerospace Power Systems turbocharger P/N 409170-0001 with the serial numbers listed below. Suspect Serial Numbers Rev. New Kelly Aerospace Power Systems Service Bulletin 029 Page 1 of 4 Service Bulletin Compliance is Considered Mandatory The technical content of this letter is FAA Approved Bulletin No. 029 Issue Date: February 1, 2008 JFL00413 JFL00414 JHL00351 JHL00352 JIL00741 JIL00742 JIL00743 JIL00744 JIL00745 JIL00746 JIL00747 JIL00748 JIL00749 JIL00750 JIL00751 JIL00752 JIL00753 JIL00754 JIL00755 JIL00756 JIL00757 JIL00758 JIL00759 JIL00760 JIL00761 JIL00762 JIL00763 JIL00764 JIL00765 JIL00766 JIL00767 JIL00768 JIL00769 JIL00770 JIL00771 JIL00772 JIL00773 JJL00098 JJL00100 JJL00101 JJL00102 JJL00103 JJL00104 JJL00105 JJL00106 JJL00107 JJL00108 JJL00109 JJL00110 JJL00111 JJL00112 JJL00113 JJL00114 JJL00115 JJL00116 JJL00117 JJL00118 JJL00119 JJL00510 JHL00341 JHL00342 JHL00343 JHL00344 JHL00345 JHL00346 JHL00347 JHL00348 JHL00349 JHL00350 KBL00771 KBL00772 KBL00773 KBL00774 KBL00775 KBL00776 KBL00777 KBL00778 KBL00779 KBL00780 KCL00180 KCL00181 KCL00182 KCL00183 KCL00184 KCL00185 KCL00186 KCL00187 KCL00188 KCL00189 KCL00190 KCL00191 KCL00192 KGL00028 KIL00089 KIL00659 KIL00843 KIL00844 KIL00845 KIL00846 KIL00847 KIL00848 KIL00850 KIL00851 KIL00852 Page 2 of 4 Kelly Aerospace Power Systems Service Bulletin 029 Rev. New PROCEDURE: CAUTION:: This procedure must be performed by competent and qualified personnel familiar with engine and airframe maintenance activities that are specific to turbocharged aircraft. CAUTION:: Do not depend on this Service Bulletin for gaining access to the aircraft or engine. This will require that you use the applicable manufacturers maintenance manuals or service instructions. In addition, any preflight or inflight operational checks require use of the appropriate AFM or POH. INSPECTION: NOTE:: If the turbochargers installed on both left and right engines can be positively iden- tified as not being affected by this service bulletin using the aircraft log books or other certified aircraft paperwork, no further action is necessary. If it cannot be established positively, then inspection of the data tag will be required. 1. Access the aircraft turbocharger by removing the engine cowling as required in accordance with instructions contained in the Piper Aircraft maintenance manual. Refer to Figure 1. 2. Identify the affected turbocharger P/N 409170-0001 (LW-12463) by checking the data tag for part number and serial number to identify whether it is one that is affected. If the turbocharger is affected continue with these instructions, if not, proceed to the “Return to Service” section step 3 and 4. 3. Carefully remove the “V” band clamp from around the turbocharger turbine housing at the turbocharger exhaust outlet taking care not to move the exhaust tube and tail pipe assembly. Figure 2 shows a “V” band clamp improperly installed, notice gap and clamp riding up on flange. 4. Inspect the turbocharger turbine housing at the flange area captured by the “V” band clamp. Use a feeler gauge at the split line between the turbine housing flange and the exhaust tube flange all around the circumference. The maximum gap should not exceed .005 inch at any point. If you suspect or know that the exhaust tube and tail pipe assembly was moved at any point prior to checking for the gap, apply pressure towards the turbine housing flange before taking a measurement. Refer to Figure 3 on page 3. 5. If a gap exceeding tolerance is found, the turbocharger and tail pipe assembly should be removed. To accomplish this, follow the instructions contained in the Piper Aircraft or STC holder’s maintenance manual or as applicable the appropriate Lycoming service information. Inspect and clean flange areas using methods recommended by Piper or Lycoming. Do not attempt repair of the turbine housing. Connect the cleaned exhaust tube to the turbocharger and re-inspect per step 4 above. If the gap still exceeds tolerance, the turbocharger turbine housing (P/N 441977-25) must be replaced. If gap tolerance is not exceeded, metal stamp a 1/8” upper case “I” in the area shown in Fig 4 (per step 7) to indicate the
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instruction was performed then proceed to step 10. Figure 1 - Turbocharger Installation 6. Upon removal, the turbocharger must be sent to a properly certificated part 145 repair station (or foreign equivalent) experienced in turbocharger repair. 7. Once the turbocharger has been repaired and returned, visually inspect for condition and orientation of the turbine housing then, using a 1/8” metal stamp of an upper case “I”, stamp the turbine housing in the area shown in Figure 4. Care must be taken not to extend stamp within 1/8” of the mating edge as it may bulge and distort the mating surface. When stamped, proceed with the installation. 8. Utilizing the applicable aircraft, engine, and/or STC holders maintenance manuals or service instructions, re-install the turbocharger assembly. Rev. New Kelly Aerospace Power Systems Service Bulletin 029 Page 3 of 4 Figure 4 - Turbine Housing Trouble Area Figure 2 - “V” band Clamp Showing Gap Figure 3 - Gap Inspection Area NOTE:: If the existing “V” band clamp is to be used, it should be inspected for damage on the inside of the “V” prior to re-use. If the inside radius of the “V” is flattened or cut it should not be used. Obtain the clamp part number from the appropriate aircraft or engine parts catalog. 9. When connecting the exhaust tube and tail pipe assembly to the repaired turbocharger, it is advisable to re-check the flange fit per step 4 prior to installing the clamp. Carefully, position and install the “V” band clamp to manufacturer specifications and proceed to “Return to Service” below. 10. If gap tolerance was not exceeded and the metal stamp “I” has been applied per step 5, carefully, position and install the “V” band clamp to manufacturer specifications and proceed to “Return to Service” below. RETURN TO SERVICE: 1. When the turbocharger has been replaced, the aircraft may now be prepared for return to service. 2. Refer to Kelly Aerospace Power Systems Service Bulletin 23 and perform the recommended turbocharger operational tests. This consists of turbocharger pre-lubrication, ground running tests, and and operational flight test. Make sure no air, exhaust, or oil leaks are present. Service Bulletin may be viewed or downloaded online via www.kellyaerospace.com. 3. Utilizing the applicable aircraft and engine manufacturers maintenance manuals, install the upper and lower engine cowls removed to gain access. 4. Upon successful completion of this service bulletin per the applicable compliance time listed on page 1, make an appropriate log book entry that includes the affected turbocharger model and serial number, along with an appropriate statement of the inspection and/or repair. MATERIAL REQUIRED: One (1) each, turbocharger turbine housing, part number P/N 441977-25 as required. All KAPS parts must be obtained through an AVIALL, Inc.. supplier. AVIALL is the sole distributor for KAPS turbocharger parts NOTE: Other incidental parts may be required during the removal and installation of the turbocharger. These parts must be obtained per the STC holders or aircraft manufacturers parts list from the applicable manufacturer. WARRANTY STATEMENT: Kelly Aerospace Power Systems will supply warranty consideration for each affected KAPS Turbine Housing (up to two per aircraft) P/N 441977-25. Additionally, up to one (1) hour labor per engine or two (2) hours labor per aircraft (at 75.00 USD) will be allowed for the inspection and repair required in this service bulletin. Warranty must be filed through AVIALL Inc. with the affected turbine housing returned. All normal KAPS warranty procedures apply. No other warranty consideration related to this service publication applies. This publication does not imply or state any responsibility for the workmanship of any person or entity performing work or maintenance on the turbocharger, engine, or aircraft. CONTACT INFORMATION: If you have any questions concerning the instructions in this service bulletin, please contact Kelly Aerospace Power Systems Technical Support at 888-461-6077. Questions concerning aircraft service or operation must be forwarded to the applicable manufacturer of that product. Page 4 of 4 Kelly Aerospace Power Systems Service Bulletin 029 Rev. New