Airworthiness Directive · Amendment 39-15878 · Liberty Aerospace Incorporated Model XL-2 Airplanes
Liberty Aerospace Incorporated Model XL-2 Airplanes
Superseded. A later AD replaced this one: AD 2009-08-05 R1. Comply with the one in force.
This AD applies to Model XL-2 airplanes, serial numbers 0007, 0009, and subsequent, that are certificated in any category.
We are adopting a new airworthiness directive (AD) for certain Liberty Aerospace Incorporated Model XL-2 airplanes. This AD requires you to repetitively inspect the exhaust muffler for cracks and to replace the exhaust muffler when cracks are found. This AD is the result of reports that cracks have been found in the exhaust muffler during maintenance and service inspections. We are issuing this AD to detect and correct cracks in the exhaust muffler, which could result in carbon monoxide entering the cabin through the heating system. Carbon monoxide entering into the airplane cabin could lead to incapacitation of the pilot.
To address this problem, you must do the following, unless already done:
| Actions | Compliance | Procedures |
|---|---|---|
| (1) Inspect the following: (i) The exhaust muffler for cracks. There are two different exhaust systems available for the affected airplanes. They are: (A) Standard exhaust system, part number (P/N) DEL200201-002 that incorporates muffler P/N DEL200201-101; and (B) Reduced sound exhaust system, P/N DEL200201-003 that incorporates muffler P/N 200201-104. | Initially inspect within the next 10 hours time-in-service (TIS) after April 20, 2009 (the effective date of this AD) or at the next annual inspection, whichever occurs first. Repetitively inspect the exhaust muffler thereafter as specified in paragraph (e)(5) of this AD. | Follow Liberty Aerospace, Inc. Service Document Critical Service Bulletin (CSB) CSB-09-001, Revision Level B, Revised on March 18, 2009. |
| (ii) The tail pipe and the tail pipe opening in the lower cowl for a 0.5-inch minimum clearance. | ||
| (iii) Inspect the propeller for proper propeller clocking position. | ||
| (2) As a result of the inspections required in paragraphs (e)(1)(ii) and (e)(1)(iii) of this AD: (i) If the clearance between the tail pipe and the tail pipe opening is less than the required 0.5-inch minimum, trim the lower cowl as needed to achieve the minimum clearance. | Before further flight after the inspection required in paragraph (e)(1) of this AD. | As specified in Liberty Aerospace, Inc. Service Document Critical Service Bulletin (CSB) CSB-09-001, Revision Level B, Revised on March 18, 2009. |
| (ii) If there is a discrepancy in the propeller clocking position, remove and reinstall the propeller at the correct position. | ||
| (3) As a result of the initial inspection required in paragraph (e)(1)(i) of this AD or any repetitive inspection required in paragraph (e)(5) of this AD, if a crack is found, replace the exhaust muffler. (i) The manufacturer will provide the replacement exhaust system. | Before further flight after the initial inspection required in paragraph (e)(1) of this AD and before further flight after any repetitive inspection required in paragraph (e)(5) of this AD. | Follow Liberty Aerospace, Inc. Service Document Critical Service Bulletin (CSB) CSB-09-001, Revision Level B, Revised on March 18, 2009. |
| (ii) A reduced sound exhaust system may be replaced with a standard exhaust system. | ||
| (iii) Installing a reduced sound exhaust system as a replacement part also requires installing a bypass SCAT tube and a “Do Not Use” placard on or near the heater knob. | ||
| (4) If the airplane is equipped with a reduced sound exhaust system and no cracks are found during the initial inspection required in paragraph (e)(1) of this AD, install a bypass SCAT tube and a “Do Not Use” placard on or near the heater knob. | Within the next 10 hours TIS after April 20, 2009 (the effective date of this AD. | Follow Liberty Aerospace, Inc. Service Document Critical Service Bulletin (CSB) CSB-09-001, Revision Level B, Revised on March 18, 2009. |
| (5) If no cracks are found in the exhaust muffler during the initial inspection required in paragraph (e)(1) of this AD or if the exhaust muffler was replaced as required in paragraph (e)(3) of this AD, repetitively inspect thereafter at the intervals specified in paragraphs (e)(5)(i), (e)(5)(ii), and (e)(5)(iii) of this AD. | (i) For airplanes equipped with a standard exhaust system and the optional bypass SCAT tube has not been installed, repetitively inspect thereafter every 25 hours TIS or every 12 months, whichever occurs first. (ii) For airplanes equipped with a standard exhaust system and the optional bypass SCAT tube has been installed, repetitively inspect thereafter every 50 hours TIS or every 12 months, whichever occurs first. | Follow Liberty Aerospace, Inc. Service Document Critical Service Bulletin (CSB) CSB-09-001, Revision Level B, Revised on March 18, 2009. |
| (iii) For airplanes equipped with a reduced sound exhaust system and the required bypass SCAT tube has been installed, repetitively inspect thereafter every 50 hours TIS or every 12 months, whichever occurs first. | ||
| (6) Report the results of the following inspections required in this AD to the FAA. (i) Initial inspection required in paragraph (e)(1) of this AD. (ii) Repetitive inspections required in paragraph (e)(5) of this AD only if cracks are found. | Within 10 days after each inspection required by this AD. | Use the form (Figure 1 of this AD) and submit it to FAA, Atlanta Aircraft Certification Office, One Crown Center, 1895 Phoenix Blvd., Suite 450, Atlanta, Georgia 30349. |
| (iii) The Office of Management and Budget (OMB) approved the information collection requirements contained in this regulation under the provisions of the Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq.) and assigned OMB Control Number 2120-0056. |
| AD 2009-08-05 Inspection Report | ||
| Airplane Serial Number | ||
| Airplane Tach Hours at time of inspection | ||
| Propeller type (circle one) | MT | Sensenich |
| Propeller Tach Hours at time of inspection | ||
| Exhaust Type (circle one) | Standard | Reduced Sound |
| Is Exhaust Cracked? (circle one) | Yes | No |
| Did lower cowl require trimming at the tail pipe opening? (circle one) Not applicable after initial inspection. | Yes | No |
| Did the propeller clocking position need to be corrected? (circle one) Not applicable after initial inspection. | Yes | No |
| Were any other discrepencies noticed during the inspection? | ||
| Name: | ||
| Telephone and/or e-mail address: | ||
| Date: | ||
| Send report to: Corey Spiegel, Aerospace Engineer, Atlanta ACO, | ||
| One Crown Center, 1895 Phoenix Blvd., Suite 450, Atlanta Georgia 30349; | ||
| facsimile: (770) 703-6097; email: corey.spiegel@faa.gov. | ||
| Figure 1 |
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
