Washington State Patrol Aviation

Document ID: FAA-2008-0420-0004
Document Type: Public Submission
Agency: Federal Aviation Administration
Received Date: April 14 2008, at 07:37 PM Eastern Daylight Time
Date Posted: April 15 2008, at 12:00 AM Eastern Standard Time
Comment Start Date: April 14 2008, at 12:00 AM Eastern Standard Time
Comment Due Date: June 13 2008, at 11:59 PM Eastern Standard Time
Tracking Number: 804f975a
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This is comment on Rule

Airworthiness Directives; Lycoming Engines IO, (L)IO, TIO, (L)TIO, AEIO, AIO, IGO, IVO, and HIO Series Reciprocating Engines, Teledyne Continental Motors (TCM) TSIO-360-RB Reciprocating Engines, and Superior Air Parts, Inc. IO-360 Series Reciprocating Engines With Certain Precision Airmotive LLC RSA-5 and RSA-10 Series Fuel Injection Servos

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In reguards to AD# 2008-08-14: (1) We previously complied with Precision Airmotive LLC PRS-107 Revision 1and . AD# 2008-06-51. AD# 2008-08-14 appears to have no change so why the change? (2) The AD requires that you check for looseness of the plug (f) with out damaging the safety wire or seal. If it is loose remove the safety wire, seal, gasket (P/N 365533)and plug ( P/N 383493). Inspect the plug, and the regulator cover. If all is well install the gasket, plug, and torque to a higher torque (90-100 in lbs). (3) If the plug is tight to begin with (paragraph g) the threads should not be damaged. Why not remove the safety wire with seal, torque the plug to the higher torque and preform the correct safety wire installation per Precision Airmotive PRS- 107 rev 1. A higher torque on the plug will make the likelyhood of an originally installed and safetied plug less prone to loosen. This doesn't alieve the repetitive inspection spelled out in paragraph (i) however further inspection will probably find the plug with the new torque stays tight. We have approx 150 hrs on our aircraft since the original service letter and haven't had a loose plug yet.