Cessna Aircraft Company P.O. Box 7706, Wichita, Kansas 67277, USA (316) 517-5800 Facsimile (316) 942-9006
COPYRIGHT © 2008
________________________________________________________________________________________________
Cessna Aircraft Company cannot be responsible for the quality of work performed by others while fulfilling the
requirements of this Service Letter. Procedures specified in this Service Letter must be accomplished using industry
standard maintenance practices and applicable government regulations.
Page 2 of 6
3.
Remove the glare shield per the Cessna 350/400 AMM.
4.
Remove the multi-function display per the Cessna 350/400 AMM and store securely.
5.
Locate part number of existing aural warning box to insure that it has the CO capability. The last
four digits of the part number required must be 0102 or higher, if this is not the part number return
the unit to PS Engineering for revision to accommodate CO.
6.
Mount CO detector (P/N 452-201-003) to bracket (P/N LB53311431) using hardware found in the
detector installation kit and two (2) lock washers (P/N MS35338-42). Reference
Figure 1
.
NOTE: Observe instructions in all Figure flag notes.
7.
Install mounted CO detector assembly on the center gusset attached aft of the firewall using the
existing hardware that attaches the K-16 relay. Reference
Figure 1
.
8.
Attach wiring harness (P/N LB53344905-1) to the CO detector, securely route and terminate
connections per
Figure 2
. If there is an existing wire in pin 10 of the J132 connector at the aural
warning unit, cap and stow the wire and run the wire labeled “J132 Pin 10” to the appropriate
location on the J132 connector.
9.
Remove the annunciator panel and replace the overlay with new (P/N LB53311411D1-19 for the
350 and LC53311411A-1 for the 400).
10.
Install circuit breaker (P/N 7277-2-2) in vacant hole on circuit breaker panel and install placard
(P/N LB53314117-1) below circuit breaker on circuit breaker panel. Reference
Figure 3
.
11.
Run new 22 AWG wire (P/N M22759/16-22-9) from J63 pin 23 crimping pin P/N 66105-4 and
run to the circuit breaker crimping terminal P/N 36152 and attach to circuit breaker using circuit
breaker hardware. Reference
Figure 3
.
12.
Remove instruments from left hand instrument plate and drill .25” hole in plate to receive
test/reset switch (P/N LA53344203-3) and install switch
13.
Reinstall instruments to instrument plate and reinstall plate. Reference
Figure 1
.
14.
Install CO detector placard (P/N LB53114117-1) above switch and test/reset placard (P/N
LB53114117-2) below switch.
15.
Attach the aircraft battery leads to apply power to the electrical system per the Cessna 350/400
AMM.
16.
Operationally test per
Figure 4
, and insert
Figure 4
into
the Section 9 of the AFM.
17.
Ensure both the master and avionics switches are in the off position.
18.
Reinstall the multi-function display, glare shield, and interior in reverse order of removal per the
Cessna 350/400 AMM.
19.
Update weight and balance and equipment list.
20.
Make log entry stating compliance with this Service Letter, SL-05-002B.
