John Martin

Ref: Airworthiness Directive (AD) 2012-03-06 1. Insufficient data/references in AD 2. Insufficient data in S/B AFS-SB6 3. Execissive man hours required to research Starting with the begining of AD 2012-03-06: Superior Air Parts, Lycoming Engines (formerly Textron Lycoming), and Continental Motors, Inc. (formerly Teledyne Continental Motors, Continental) Fuel-Injected Reciprocating Engines: Amendment 39-16947; Docket No. FAA-2011-0547; Directorate Identifier 2011-NE-13-AD. (a) Effective Date This AD is effective February 24, 2012. (b) Affected ADs This AD supersedes AD 2011-15-10, Amendment 39-16757 (76 FR 45655, August 1, 2011). (c) Applicability This AD applies to all Superior Air Parts, Lycoming Engines, and Continental Motors, Inc., fuel injected reciprocating engine models with an AVStar Fuel Systems, Inc. (AFS) fuel servo diaphragm, part number (P/N) AV2541801 or P/N AV2541803, installed. My comments to the above: By TCDS there are only 2 Continental engines with the Bendix/PSA Fuel Injector, the TSIO-520-WB and the TSIO-360-RB. All oters have CMI (Continental Injectors) My Question is Why does the AD say All Continental Engines?? Next: (f) Remove Fuel Servo (1) Within 5 flight hours after the effective date of this AD, determine if an AFS fuel servo diaphragm P/N AV2541801 or P/N AV2541803, from an affected production lot was installed in your fuel servo at any time after May 20, 2010. Use AFS Mandatory Service Bulletin (MSB) No. AFS-SB6, Revision 2, dated April 6, 2011 to determine if your fuel servo has an affected diaphragm. If you determine that your fuel servo has an affected diaphragm, remove the fuel servo from service before further flight. The AD References S/B AFS-SB6 which references RSA-5 and 10 tyoe fuel servos, but I understand -7 could also be affected. This AD needs to be rewritten to show which Models of engines are affected. The way it is written is a waste of end user time and resources. I can add no more 5 ch