Quote: Piloto
EMERGENCY AIRWORTHINESS DIRECTIVE
Aircraft Certification Service
Washington, DC
U.S. Department
of Transportation
Federal Aviation
Administration
We post Emergency ADs on the internet at www.faa.gov/aircraft/safety/alerts.
DATE: March 12, 2008
AD #: 2008-06-51
This emergency airworthiness directive (AD) 2008-06-51 is sent to all owners and operators
of 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.
Background
This emergency AD results from eighteen reports of fuel injection servo plugs, part number
(P/N) 383493, that had loosened or completely backed out of the threaded plug hole on the regulator
cover of the fuel injection servo. These servo plugs were installed with servo plug gasket, P/N
365533, under the plug hex-head. Precision Airmotive LLC investigated and determined that servo
plug gasket, P/N 365533, can shrink from engine heat, causing the plug to lose torque against the
servo regulator cover, allowing the plug to vibrate out. The threads on the plugs were also found
damaged. Servo plug gaskets, P/N 365533, installed on RSA-5 and RSA-10 series fuel injection
servos since August 22, 2006, are made of a different material than the previous gasket part number
used. This condition, if not corrected, could result in a substantial loss of engine power and
subsequent loss of control of the airplane.