SERVICE BULLETIN M20-312
Mooney M20TN Acclaim Type S · Normal Procedures
Overview
This Service Bulletin M20-312, dated June 27, 2011, addresses the inspection and cleaning of the crankcase breather tube for the Mooney M20TN Acclaim Type S aircraft equipped with the TSIO550G engine. It highlights the potential issue of oil coking and deposit buildup at the crankcase breather outlet tube, which can lead to increased crankcase pressures and oil consumption. The bulletin provides detailed instructions for pilots and maintenance personnel on how to inspect, clean, and replace the breather tube and hoses as necessary. Compliance with this bulletin is crucial for maintaining engine performance and reliability, and it should be completed within the next 15 flight hours or at intervals not exceeding 100 hours of service.
- Inspect crankcase breather tube within the next 15 flight hours or at intervals not exceeding 100 hours.
- The outlet opening of the breather tube should be approximately 5/8 in. (0.625 in.) when clear.
- Use a hard wire brush and solvent for cleaning the breather tube; avoid damaging the tube.
- Replace any damaged breather hoses with part number 628555-45, trimmed to fit.
- Document compliance with the bulletin and return to Mooney Airplane Company.
Document
Source
Originally published by mooney.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type
- Normal Procedures
- Year
- 2011
- Pages
- 5
- File size
- 1.4 MB
- Publisher
- mooney.com
Specifications & performance
Extracted from this document.
Specifications
- Engine model
- TSIO550G
Most owners only have the POH. Here's the essential set for the Mooney M20TN Acclaim Type S.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins
- Type Certificate (TCDS)
More Mooney M20TN Acclaim Type Smanuals & documents
- Airworthiness Directives for the Mooney M20TN Acclaim Type SAirworthiness Directives
- SERVICE BULLETIN M20-299AV Speeds Reference
- SERVICE BULLETIN M20-311Maintenance Manual
- 2009 GAMA Statistical Databook & Industry OutlookTraining Manual
- SERVICE BULLETIN M20-309Flight Manual
- Mooney Acclaim Type SOther Documents
- Mooney Acclaim Type SPilot's Operating Handbook
- 2008 Mooney M20TN Acclaim Type SSystems Description
- Mooney Retrofit KitsAvionics Manual
- Type Certificate Data Sheet for Mooney M20TN Acclaim Type SType Certificate
- Weight & Balance for Mooney M20TN Acclaim Type SWeight And Balance
In this document
Introduction
The introduction outlines the purpose of the bulletin, which is to address issues related to oil coking and deposit buildup in the crankcase breather outlet tube. It emphasizes the importance of inspecting and cleaning the breather tube to prevent increased crankcase pressure and oil consumption.
Breather Tube and Hose Inspection
This section details the steps for inspecting the crankcase breather tube and hoses. It instructs the technician to turn off the master switch, remove the cowling, and inspect the tailpipe fitting for deposits. The outlet opening should be approximately 5/8 in. (0.625 in.) when clear. If any damage or buildup is found, further cleaning procedures are required.
Breather Tube Cleaning
Instructions for cleaning the breather tube are provided, including the use of a hard wire brush and solvent to remove deposits. Caution is advised to avoid damaging the tube. The section also specifies that any damaged hoses should be replaced with part number 628555-45.
Compliance and Warranty
The bulletin specifies that compliance should be documented and returned to Mooney Airplane Company. It also mentions that labor for corrective actions performed in accordance with the bulletin will be warranted for one hour if the aircraft is under warranty.
Safety notes
- Care must be taken to prevent damage to the interior of the tube during cleaning.
- Do not use graphite impregnated tools on exhaust components.
Full document text
MOONEY AIRPLANE COMPANY, INC. SERVICE BULLETIN 165 Al Mooney Road Kerrville, Texas 78028 MOONEY AIRPLANE COMPANY, INC. 165 Al Mooney Road, Kerrville, Texas 78028 tel: 830-896-6000 www.mooney.com Page 1 of 5 THIS BULLETIN IS FAA APPROVED FOR ENGINEERING DESIGN SERVICE BULLETIN M20-312 Date: June 27, 2011 SUBJECT: Mooney M20TN - Crankcase Breather Tube Inspection and Cleaning MODELS/ SN Mooney M20TN Acclaim and Type-S Aircraft w/TSIO550G( ) installed. AFFECTED: TIME OF WITHIN NEXT 15 FLIGHT HOURS - Re-inspect at intervals not to exceed 100 hours time in service. COMPLIANCE: INTRODUCTION: Continental Motors Inc. has found instances of oil coking and deposit build up at the crank- case breather outlet tube inside of the left hand exhaust tailpipe, which could result in the en- gine exhibiting higher than normal crankcase pressures and or increased oil consumption. This Service Bulletin is to provide instructions for inspecting and cleaning of the crankcase breather tube outlet and/or replacement of the crankcase breather rubber hoses. The at- tached compliance card needs to be filled out and returned to Mooney Airplane Com- pany upon completion of this Service Bulletin M20--312. INSTRUCTIONS: Read entire procedures before beginning work. BREATHER TUBE AND HOSE INSPECTION: 1.1. Turn master switch - OFF. 1.2. Remove top and bottom cowling per instructions provided in Chapter 71-10-00 of applicable MAC aircraft Service & Maintenance Manual. 1.3. Using a bright light source, inspect crankcase breather tube tailpipe fitting on the left side engine exhaust tailpipe. Viewing from tailpipe outlet look into the tailpipe and inspect for oil coking and build up of deposits at crankcase breather tube tailpipe fitting on inner wall of tailpipe (see Figure SB M20-312-1) . 1.4. The outlet opening is approximately 5/8 in. (.625) when clear. Inspect all rubber crankcase breather tubes for damage or cracking (see Figures SB M20-312-2 & 3) a.) If outlet is clear and rubber hoses are in good condition, proceed to step 1.9. - Re-inspect at intervals not to exceed 100 hours time in service. b.) If outlet has build up of deposits and/or rubber hoses are found damaged, proceed to Breather Tube Cleaning. BREATHER TUBE CLEANING: 1.5. Loosen clamp and slide hose from crankcase breather tube tailpipe fitting on left hand exhaust tailpipe (see Figure SB M20-312-2). 1.6. Using a hard wire brush and/or a scraping tool sized to fit inside the tailpipe fitting, insert tool into tailpipe fitting and break away any deposit build up from interior of tube. CAUTION: Care must be taken to prevent damage to the interior of tube and tube to tailpipe weld connec- tion. Remove only deposits from oil coking. DO NOT use any graphite impregnated tool on exhaust pieces. MOONEY AIRPLANE COMPANY, INC. 165 Al Mooney Road, Kerrville, Texas 78028 tel: 830-896-6000 www.mooney.com Page 2 of 5 1.7. After removing build up, use wire bristle brush to clean any fine particles that remain and flush with Stoddard solvent. 1.8. Reinstall hose(s) onto breather tube outlet tube(s) and tighten clamp(s) (see Figures SB M20-312-3) NOTE: Replace any rubber breather hose if it is damaged or cracked using P/N 628555--45 (trim to fit). Per the engine maintenance manual, inspect the entire length of the breather system for block- age (FOD) and remove as required. 1.9. Re-install top and bottom cowling per instructions provided in Chapter 71-10-00 of applicable MAC aircraft Service & Maintenance Manual. 1.10. Complete log book entry. NOTE: Fill out compliance card and send by MAIL or FAX to Mooney Airplane Company as indicated on the attached Compliance Card (see to Figure M20-312-4) 1.11. Return aircraft to service. 1.12. Procedure complete WARRANTY: Mooney Airplane Company, Inc. will warrant labor 1 hour when corrective action is done in accordance with procedures of this Service Bulletin for aircraft currently covered under the Mooney Airplane Company, Inc. factory warranty program. REFERENCE 1. MAC Maintenance Manual (applicable A/C) DATA: 2. Continental Motors M-18 Maintenance and Overhaul Manual PARTS LIST: Refer to Continental Motors - Customer Service at 800.326.0089 for part procurement. Parts Kit P/N: Item P/N Description Qty 1. 628555--45 HOSE (.75 I.D. X 30”) Trim to Fit 1 MOONEY AIRPLANE COMPANY, INC. 165 Al Mooney Road, Kerrville, Texas 78028 tel: 830-896-6000 www.mooney.com Page 3 of 5 HOSE ASSY HAS BEEN REMOVED NOTE: INSPECT FOR OIL COKING AND BUILD UP OF DEPOSITS 5/8 in. (.625") WHEN CLEAR Figure SB M20-312-1 - CRANKCASE BREATHER TUBE INSPECTION HOSE CLAMP(S) Figure SB M20-312-2 - CRANKCASE BREATHER TUBE, HOSE AND CLAMPS MOONEY AIRPLANE COMPANY, INC. 165 Al Mooney Road, Kerrville, Texas 78028 tel: 830-896-6000 www.mooney.com Page 4 of 5 REPLACE ALL DAMAGED OR CRACKED HOSES IF REQUIRED ANY BLOCKAGE REMOVE AND/OR COKING LH SIDE VIEW 628555-45 HOSE P/N TRIM TO FIT (2) PLACES Figure SB M20-312-3 - CRANKCASE BREATHER HOSE INSPECTION MOONEY AIRPLANE COMPANY, INC. 165 Al Mooney Road, Kerrville, Texas 78028 tel: 830-896-6000 www.mooney.com Page 5 of 5 MOONEY AIRPLANE COMPANY KERRVILLE, TEXAS 78028 -- 1-800-331-3880 SERVICE (BULLETIN) (INSTRUCTION) NO.________________HAS BEEN COMPLIED WITH ON AIRCRAFT MODEL _______________ SERIAL NUMBER ________________ Tach. Time: Owner: N-Number (Reg. No.) Date of Compliance: Complied By: Form 07-0001 Inspection Report: MOONEY AIRPLANE COMPANY ATT’N: TECHNICAL SUPPORT 165 Al Mooney Road, North Kerrville, Texas 78028 PLACE STAMP HERE SEND TO: Mooney Airplane Company 165 Al Mooney Road North Kerrville, TX 78028 OR FAX: (830) 257-4635 Figure SB M20-312-4 -- Compliance Card