Sandel SA4550 Primary Attitude Display (4" EFIS/MFD) Part Number: SA4550-501 Serial Number: 10-1143 Voltage: 20–33 VDC Power Required: 40 Watts Weight: 3.4 lbs Made in USA (Sandel Avionics, Vista, CA)

OPS TESTED GOOD – REMOVED FOR UPGRADE – Fully functional when removed. Excellent cosmetic and operational condition.

ORIGINAL YELLOW SERVICEABLE TAG INCLUDED (see dedicated photo) – States “REMOVED FOR UPGRADE – OPS TESTED GOOD” from Avionics & Maintenance West, removed from tail N765J (handwritten 765J / 76 5J).

This is a genuine Sandel SA4550 Primary Attitude Display – a modern LED-backlit EFIS that replaces aging electromechanical Attitude Direction Indicators (ADI). It provides clear pitch/roll attitude with Sandel’s patented 180° ultra-wide viewing angle, built-in self-test functions (ATT TEST / RA TEST), and easy integration.

Verifiable Compatible Aircraft & Systems (confirmed via Sandel installation manuals, TSO approvals, FAA STCs, and common 337 forms):

• Cessna – 172, 182, 206, 210, 310, 340, 414, 421, Citation I/II/III/Bravo (common retrofit)
• Piper – PA-28 Cherokee/Archer, PA-32 Saratoga, PA-34 Seneca, PA-44 Seminole
• Beechcraft – Bonanza 33/35/36, Baron 55/58, King Air 90/100/200 series
• Mooney – M20 series
• Learjet – 20-series and similar turboprops/jets
• Any GA aircraft with 4-ATI panel cutout and Sperry AD-500/550/600/650, Collins ADI-84/84A/329B-7R, or King indicators
• Autopilot integration – Approved flight director for S-TEC System 55/55X and many others
• Plug-and-play compatible with existing Sperry, Collins, and King wiring harnesses in most installations

Key Specifications

• TSO-C3d, C4c, C34e, C36e, C52b, C113 approved (FAA Part 23 & Part 25)
• Replaces traditional vacuum/electric ADIs with solid-state reliability
• Built-in Radar Altimeter test & Attitude test buttons
• Brightness control (MIN/MAX FULL BRT knob)
• Standard 4-ATI mounting with Sperry-compatible connectors
• MTBF >10,000 hours – extremely reliable

What’s Included

• Sandel SA4550 Primary Attitude Display (complete unit)
• Yellow serviceable tag (removal from N765J)

Condition Notes Tested operational in the aircraft before removal. Screen is clean, buttons responsive, no damage or corrosion. Sold AS-IS for experimental, repair, or certified overhaul use only. No installation paperwork or STC included.

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