"2011 DIRECT"... - Cessna

500, 550, S550, 560 and 560XL, ATA: 78-30
New Thrust Reverser Disable and
Lock-Out Recommendations
Cessna and Nordam recommend that operators first operate the related EMER STOW switch before disabling
and lock-out of one or both thrust reversers for servicing, maintenance or flight. This action ensures the inboard
and outboard actuators have traveled past the over-center point for installation of the mechanical lock-out tool,
followed by disconnecting the electrical connectors on the thrust reverser control valves.
Note: The EMER STOW switches can be operated by referring to the approved Airplane Flight Manual (AFM) during
an engine run, or referring to the applicable maintenance manual for procedures utilizing external hydraulic and
electrical power sources.
Operators have reported issues with verifying that both inboard and outboard thrust reverser actuators are in the
over-center position when installing the lock-out tool.
Change requests have been submitted to Technical Publications to revise the maintenance manuals for thrust reverser
disabling and lock-out procedures.
Questions, please contact:
Team Legacy
1-800-835-4090
hotline@cessna.textron.com
Team Excel
316-517-1400 (Direct)
1-877-560-3960 (WATS)
teamxl@cessna.textron.com
525, 525A and 525B, ATA: 72-00
Avoid Rapid Throttle Lever Movements
Operators of CJ1+, CJ2+ and CJ3 aircraft should be aware that rapid throttle lever movements forward and aft
should be avoided. Moving a throttle lever forward and aft at least 75 degrees of travel in less than one second can
cause a loss-of-thrust control (LOTC) event, indicated by an amber ENG CTRL SYS FAULT L R annunciator light.
Citation Customer Support has been made aware of FADEC download data provided by Williams, which has indicated
a trend of some “operator-induced” LOTC events.
Cessna recommends that operators utilize smoother transitions of throttle lever inputs to avoid an LOTC event.
If an ENG CTRL SYS FAULT L R annunciator light does appear, the applicable L ENG or R ENG FADEC RESET button
can be pressed to clear the fault.
Note: The use of the FADEC RESET button(s) in this manner anly applies to those airplanes with the newest
FADEC software installations:
- CJ1+ (FADEC software P/N CP208.02 found on the FADEC data plate)
- CJ2+ (FADEC software P/N CP294.03.01 found on the FADEC data plate)
- CJ3 (FADEC software P/N CP219.11.06 found on the FADEC data plate)
Questions, please contact:
Customer Service Hot Line
1-800-835-4090
316-517-6261 (International)
hotline@cessna.textron.com
Or:
Williams International Hotline
(USA) 1-800-859-3544
(International) 1-248-960-2929
WIProductSupport@williams-int.com
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