SAIB NE-05-40 —

NE-05-40 March 18, 2005 www.faa.gov/certification/aircraft This is information only. Recommendations aren’t mandatory.

Introduction

This Special Airworthiness Information Bulletin alerts you, owners and operators of the Textron Lycoming Corp. engine models listed in Table 1, with fuel pump part number (P/N) LW-15473 and manufacturer's code 154733201, of the need to replace the pump within the next 25 hours of operation.

Table 1 AEIO-320 AIO-360 IO-540 AEIO-360 HIO-360 O-540-L3C5D AEIO-540 IO-320 TO-360-C1A6D AIO-320 IO-360 TO-360-F1A6D

Background

Lycoming has issued Mandatory Service Bulletin (MSB) No. 565 (attached) advising that, "... a number of diaphragm-type fuel pumps, Lycoming P/N LW-15473, may not have been manufactured in conformance with manufacturer's specifications. This can result in a restricted and/or loss of fuel flow." Additionally, the MSB states that, "If your Lycoming engine has a diaphragm-type fuel pump with P/N LW-15473 installed, and has a date code of 3201 (manufacturer's code 154733201), the pump must be replaced prior to next flight." The manufacturer's code consists of the Lycoming P/N followed by the date code. Figure 1 of MSB 565 shows where the manufacturer's code can be found on the pump. The fuel pump may have to be removed in order to read the manufacturer's code on some aircraft.

Recommendation

Perform the inspection specified in Lycoming MSB No. 565 within 25 hours and replace the fuel pump prior to next flight if the date code is 3201.

For Service Bulletin Copies, Contact

Lycoming, 652 Oliver St, Williamsport, PA 17701, phone: (570) 323-6181; fax: (570) 327-7101; or go to their website: http://www.lycoming.textron.com/main.jsp? bodyPage=/support/publications/ maintenancePublications/serviceBulletins.html and click on SB 565.

For Further Information, Contact

Norm Perenson, Aerospace Engineer, FAA NYACO, ANE-171, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; phone: (516) 228-7337; fax: (516) 794-5531; email: [email protected]