SERVICE BULLETIN M20--294
Mooney M20S Eagle · Flight Manual
Overview
This Service Bulletin (M20-294) issued by Mooney Airplane Company addresses the inspection and replacement of the retaining nut fastener on the engine throttle arm specifically for the M20S Eagle and other models. It highlights a potential issue with the throttle body control arm becoming loose, which necessitates a one-time inspection and possible replacement of the retaining nut. The bulletin provides detailed instructions for compliance, including necessary tools and parts, and emphasizes the importance of following the outlined procedures to ensure safety and proper aircraft operation. It is essential for maintenance personnel and technicians to read the entire bulletin before proceeding with the inspection and replacement process.
- Inspect and replace the throttle body retaining nut fastener as per Service Bulletin M20-294.
- Torque the new retaining nut (P/N MS21042-5) to 100-120 IN-LB.
- Complete the inspection within the next 10 hours of flight time.
- Document the inspection results on the provided Inspection Card (Form 07-0001).
- Mooney will warranty labor for this procedure if performed under their factory warranty program.
Document
Source
Originally published by www.mooney.com. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type
- Flight Manual
- Year
- 2007
- Pages
- 2
- File size
- 1.1 MB
- Publisher
- www.mooney.com
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- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins
- Type Certificate (TCDS)
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In this document
Introduction
The bulletin introduces the issue of a loose throttle body control arm, which has been reported in the field. It emphasizes the need for a one-time inspection and replacement of the throttle body retaining nut fastener.
Instructions
The instructions detail the steps for conducting the inspection and replacement. Key steps include turning off the master switch, removing the top cowling, inspecting the throttle body arm, and replacing the retaining nut with part number MS21042-5, torqued to 100-120 IN-LB.
Compliance Time
The bulletin specifies that the inspection and any necessary replacement should be completed within the next 10 hours of flight time to ensure aircraft safety.
Warranty Information
Mooney Airplane Company offers a warranty for labor (approximately 1 hour) when the procedures outlined in this Service Bulletin are followed for aircraft under the factory warranty program.
Parts List
A parts list is provided, including the locknut (P/N MS21042-5) and the Inspection Card (Form 07-0001), which are included in the Service Bulletin kit.
Safety notes
- Ensure the master switch is OFF before beginning work.
- Verify throttle linkage adjustment after replacing the retaining nut.
Full document text
MOONEY AIRPLANE COMPANY, INC. SERVICE BULLETIN Louis Schreiner Field Kerrville, Texas 78028 MOONEY AIRPLANE COMPANY, INC. Louis Schreiner Field, Kerrville, Texas 78028 tel: 830-896-6000 www.mooney.com THIS BULLETIN IS FAA APPROVED FOR ENGINEERING DESIGN SERVICE BULLETIN M20--294 Date: January 18, 2007 SUBJECT: Inspection and replacement of retaining nut fastener on the engine throttle arm for TCM engines. MODELS/ SN AFFECTED: M20R -- All aircraft M20S -- All aircraft M20TN -- All Aircraft TIME OF COMPLIANCE: Next 10 hour of Flight Time INTRODUCTION: There has been one reported instance, discovered in the field, of the throttle body control arm being loose. This will require a (1) time inspection and replacement of the throttle body retaining nut fastener. INSTRUCTIONS: Read entire procedure before beginning work. 1. Turn master switch -- OFF. 2. Remove top cowling per instructions provided in Chapter 71-10-00 of applicable MAC aircraft Ser vice & Maintenance Manual. 3. Remove and clean any torque seal from threads and retaining nut fastener on the engine throttle arm. NOTE: If the throttle body arm is removed, adjustments will be required per instructions provided in Chap- ters 71-00-52 and 76--00--01 of applicable MAC aircraft Service & Maintenance Manual. 4. Remove retaining nut from throttle body arm and Inspect mating surface for any unusual wear. Install new retaining nut p/n MS21042-5 included in your SB Kit [P/N SB M20-294-001] and torque to 100-120 IN-LB (see Figure M20-294-1). 5. Verify throttle linkage adjustment per instructions provided in Chapters 71--00--52 and 76-10-00 of applicable MAC aircraft Service & Maintenance Manual. 6. Apply a bead of torque seal to threads and fastener. 7. Re-install top cowling (and bottom cowling if removed) per instructions provided in Chapter 71-10-00 of applicable MAC aircraft Service & Maintenance Manual. 8. Complete the Inspection Card (positive or negative) p/n Form 07-0001 included in your SB Kit [P/N SB M20-294-001] and return it to Mooney Airplane Company. 9. Complete log book entry. 10. Return aircraft to service. 11. Procedure complete. WARRANTY: Mooney Airplane Company, Inc. will warrant labor (approximately 1 hour), when done in accor- dance with the procedures of this Service Bulletin for aircraft currently covered under the Mooney Airplane Company, Inc. factory warranty program. REFERENCE DATA: MAC Service & Maintenance Manuals (applicable A/C) PARTS LIST: Mooney Airplane Company, Inc., Parts Kit: M20--294--001 Item P/N Description Qty 1. MS21042-5 Locknut 1 2. Form 07-0001 Inspection Card 1 MOONEY AIRPLANE COMPANY, INC. Louis Schreiner Field, Kerrville, Texas 78028 tel: 830-896-6000 www.mooney.com OVATION (M20R) & EAGLE (M20S) -- THROTTLE ASSEMBLY ACCLAIM (M20TN) -- THROTTLE ASSEMBLY Remove and Install Torque to 100-120 IN-LB New Nut P/N MS21042--5 Remove and Install Torque to 100-120 IN-LB New Nut P/N MS21042--5 Figure SB M20-294-1