AERO 551-101-002 Panel Mount Digital CO Detector

• Power usage less than 2 watts
• Temperature range 0 °C to 50 °C
• Humidity 5% to 95% (non-condensating)
• Circuit breaker 2 amps
• Interface: RS-232
• Size: fits standard 2/14 inch round panel cut-out and is 2 1/2 inch deep
• Weight 7.5 oz.
• Sensor tested to 25,000 feet
• 15 pin connector

Approved PFD, MFD, and Engine Monitor Products that will display the Aero 551 data:

• Garmin: Garmin G3X, Garmin G3X Touch, Garmin GNS 480, Garmin G900
• J.P. Instruments (JPI): EDM 730, EDM 830, EDM 900 Primary, EDM 900 Experimental, EDM 930 Primary, EDM 930 Experimental, EDM 960 Twin
• Electronics Instruments (EI): MVP50P, MVP-50T, CGR-30P
• Advanced Flight System: AF2500/3500/4500/5000/5400/5500/5600/5800
• Grand Rapids Technologies (GRT): Sports SX, Horizon HX, and HXr EFIS Systems
• Ultra Electronics: AuRACLE CRM 2120
• MGL Avionics: XTreme EFIS

View all of our videos on our YouTube video channel.

• AERO 551 Panel Mount User Manual (PDF)
• AERO 551 Panel Mount Installation Drawings (PDF)
• AERO 551 Instructions for Continued Airworthiness (PDF)
• 337 Approval Sample Letter 
• AERO 551/553 Panel Mount Installation Drawings (PDF)
• 551 TSO Letter

Guardian Avionics products are covered by a 60-day money-back guarantee and a one-year limited warranty.

Coverage

Guardian Avionics (CO Guardian LLC) warrants to the original purchaser that this detector will be free from defects in material and workmanship for one (1) year from the date of purchase. Coverage is registered automatically; retain your invoice as proof of purchase date.

Should a defect arise within the warranty period, Guardian Avionics will, at its sole discretion, repair the unit, replace it, or furnish a repaired unit. This is the purchaser's sole and exclusive remedy under this warranty. Any repaired or replacement unit is warranted for the remainder of the original warranty period or for six (6) months, whichever is longer. No charge applies other than return postage.

This warranty extends to the original purchaser only and is not transferable.

Exclusions

This warranty does not apply where the unit has been:

• opened, modified, or otherwise tampered with;
• damaged by accident, unreasonable use, or neglect; or
• affected by installation or soldering errors, for which Guardian Avionics accepts no responsibility.

Nor does it extend to any failure arising from a cause other than a defect in material or workmanship.

Disclaimers and Limitation of Liability

All implied warranties, including the implied warranties of description, merchantability, and fitness for a particular purpose, are limited in duration to the warranty period stated above.

Guardian Avionics shall not be liable for loss of use, or for any indirect, special, incidental, or consequential damages, costs, or expenses incurred by any user of this product, whether such claim arises in contract, negligence, strict liability, or otherwise — including any personal injury or property damage resulting from gas leakage, fire, or explosion.

This detector is not a substitute for property, disability, life, or other insurance. Securing appropriate coverage remains the responsibility of the owner.

Certain states do not permit limitations on the duration of an implied warranty, or the exclusion of incidental or consequential damages; accordingly, portions of the foregoing may not apply. This warranty confers specific legal rights, and the purchaser may hold additional rights that vary by jurisdiction.

Claim Procedure

1. Verify that the serial number on the unit matches the number shown on your invoice.
2. Request a Return Materials Authorization (RMA) number using the online form at guardianavionics.com/pages/rma-request, or by telephone on 520-889-1177 or email to support@guardianavionics.com. An RMA number must be issued before any unit is returned. Units purchased through a dealer should be submitted to Guardian Avionics directly.
3. Return the unit postage prepaid to the address below, marked with the RMA number and accompanied by proof of purchase date and a description of the fault.

Warranty Service

Guardian Avionics / CO Guardian LLC
Attn: RMA #______
1840 E Valencia Rd, Suite 216
Tucson, AZ 85706

520-889-1177 · Fax 520-889-8249 · support@guardianavionics.com

Monday–Friday, 8:00 a.m. – 5:00 p.m. MST

AERO 454, AERO 455, AERO 551, AERO 553 TSO Approval Letter
CLICK HERE TO VIEW

FAA Certification

When
installed in accordance with this installation manual and the
limitations, the installation of our TSO Approved models 452/454/455/551 and 553 is unlikely to have an appreciable effect on the weight, balance, structural strength, reliability, operational characteristics, or other characteristics affecting the airworthiness of the aircraft, and should therefore be eligible for installation as a minor
alteration. 

Please see the Instructions of continued Airworthiness for each model for limitations (available on downloads page). Most customers have been able to install these as Minor
installation per AC 23.1309-IE and FAR 23.109. You must seek proper guidance prior to installation from you local FAA FISDO for clarification. 

FAA Advisory Circular on CO

The above FAA circular provides information on the potential dangers of Carbon Monoxide contamination from faulty engine exhaust systems or cabin heaters of the exhaust gas heat exchange type. It also discusses
means of detection and procedures to follow when contamination is suspected. 

FAA Requirements for CO in Aircraft during Certification

FAR. 23.831 Ventilation in Aircraft

(a) Each passenger and crew compartment must be suitably ventilated. Carbon monoxide concentration may not exceed one part in 20,000 parts of air (50 PPM). 

All Panel mounted units are designed to alarm within 5 minutes if CO is between 50 PPM and 75 PPM to meet the requirements of TSO C48. 

AERO-152WD Warning Levels shown below. Note: (252,352's, 353's,452's and 552 all alarm with 5 minutes if CO is above 50PPM). 

Caution - This product is intended to be used in aircraft enclosed cabins. Because of its super-sensitivity, it's not designed to be in compliance with UL2034, OSHA, and other industry standards. 

National Transportation Safety Board Recommends CO Detectors to be installed in all General Aviation Aircraft. 

FAA CERTIFICATION / STC

When installed in accordance with this installation manual and the limitations that follow, the installation of the model 452 is unlikely to have an appreciable effect on the weight, balance, structural strength, reliability, operational characteristics, or other characteristics affecting the airworthiness of the aircraft, and should therefore be eligible for installation as a minor alteration. Model
AERO 452 has TSO certification and is STC approved for installation on certified aircraft. Customers have three options depending on their relationship with their local FAA FISDO office (you must seek proper guidance prior to installation). 1) Install it as minor log book entry
since the unit is TSO approved as non essential equipment. 2) Install it using FAA Form 337 as minor alternation. 3) Install it per supplied STC on a Cessna 172. Data shown in our Downloads section. 

However, no approval exists for the other panel-mount models of CO Guardian (models AERO 252, 352's, 353's, 551 and 553). Acceptance for the installation and use of as a non-essential equipment (per AC 23-15, paragraph V, pg. 28), must be sought through your local FBO and the appropriate offices of the Federal Aviation Administration or other certifying agency. 

452 Sample 337 FAA Form - please visit Downloads page
Sample 337 Model 552 - please visit Downloads page

Guardian Avionics Installation Examples

Because of their sensitive nature, all carbon monoxide
(CO) detector sensors require replacement after a period of time to remain accurate. All Guardian Avionics / CO Guardian aviation CO detectors feature a self-test at power on for each flight. If the unit shows a failure of the CO sensor upon power up, you must send the unit to Guardian Avionics for replacement or overhaul. Depending on level of
use, storage environment, and flight environment, most CO sensors have a usable life of 5-7 years. Though our units have a required Time Before Overhaul (TBO) of Seven (7) years from point of installation regardless of self-test results, we recommend sending in your unit for replacement / recalibration every 5 years during your annual maintenance inspection to assure safety and accuracy of your unit. 

The procedure for recalibration is as follows:

• Remove component and note full model number and unit serial number.
• Apply for an RMA Number at: https://www.guardianavionics.com/rma-request or call 520-889-1177 (M-F, 8am to 5pm MST) - the RMA number will be emailed back to you.
• Order a recalibration or new replacement at https://www.guardianavionics.com/recalibration.
• Send unit in under RMA number to: Guardian Avionics, Attn: RMA #___, 1840 East Valencia Rd, Suite 216, Tucson, AZ 85756
• Once unit is received by Guardian Avionics, the recalibrated or replaced unit will be shipped within 3-5 business days unless specified. Core charge will be refunded.
• Upon receipt of the recalibrated/replaced unit, a fresh 1 year limited warranty applies and the unit has a fresh 7 year TBO.