SERVICE BULLETIN
SERVICE BULLETIN M20-335B
Date: January 2, 2019
THIS BULLETIN DOES NOT CHANGE AIRCRAFT TYPE DESIGN
MOONEY INTERNATIONAL
165 Al Mooney Road North
Kerrville, Texas 78028
CORPORATION
SBM20-335B Page 1
MOONEY INTERNATIONAL CORPORATION 165 Al Mooney Road North, Kerrville, Texas 78028 tel: 830- 896-6000 www.mooney.com
SUBJECT: Mooney Aircraft Flight Control Balancing After Painting
MODELS/ SN M20R - S/N 29-0520 thru 29-0525
AFFECTED: M20TN - S/N 31-0128 thru 31-0143
M20U - S/N 32-0003
M20V - S/N 33-0004, 33-0006, 33-0007
TIME OF Before Next Flight
COMPLIANCE:
INTRODUCTION: Mooney International Corporation has determined a flight control balance issue may exist after
final paint by outside vendors. Mooney Engineering has determined that the aircraft listed will
need to have the specified control surfaces removed and balanced per Mooney specifications
found in the applicable Service and Maintenance Manual and Mooney Spec 20 Section 35. If
Rudder and/or Elevator Control Surface is found to be out of specification, you will need to use
STEPS 3.0 in this Service Bulletin. A Limitation Placard must be installed prior to flight for Aircraft
requiring flights to a maintenance facility. Compliance with this Service Bulletin will be considered
a one-time inspection and repair, requiring no additional inspections, unless flight control(s) are
repaired, replaced or repainted, which will then need to be rebalanced as required.
INSTRUCTIONS: Read entire procedures before beginning work.
NOTE:
All work to be done in accordance with F AA AC43.13.
NOTE:
Record ALL Surface Rigging Values before removing components. Run trim wheel up, all the way to the
stop before removing components.
- CAUTION -
DO NOT move control surfaces to extreme angles. Be gentle with tabs and do not bend them.
STEP 1 - LIMITATION Placard (for Aircraft requiring flights to a maintenance facility)
1.0 PLACARD INSTALLATION - Refer to Figure SBM20-335-1
1.1. Install placard P/N M20-335-901 or M20-335-902 on instrument panel, refer to Figure
SBM20-335-1 for effectivity, clean surface area with isopropyl alcohol before applying
placard, this will remove any oils or debris from surface.
1.2. Fly Aircraft to approved Mooney Repair Station for compliance with this Service Bulletin.
- CAUTION -
DO NOT EXCEED SPEEDS INDICATED ON INSTALLED PLACARD SBM20- 335- 901 OR SBM20-335-902.
STEP 2 - Checking Flight Control Balance - Rudder and Elevator Only
RUDDER REMOVAL/INSTALLATION - Refer to Figure SIM20- 335-2
2.1. Disconnect rudder push- pull tube from rudder horn by removing Bolt AN3-10, Washers
NAS1149F0332P, Nut MS17825-3 and Cotter Pin MS24665-151, refer to Figure SIM20-335-2.
2.2. Disconnect (un-pin) Strobe Light harness from lower tailcone/rudder area.
2.3. Remove attaching hardware at rudder hinges, note each hinge hardware on zone chart(s) Figure
SIM20-335- 8.
To Next Page
Need help?
General
