CAL-61-02
Page 2
June 18, 2014
Caravan
SERVICE LETTER
CAL-61-02
ACCOMPLISHMENT INSTRUCTIONS
1.
Prepare the airplane for maintenance.
A.
Make sure that the airplane is electrically grounded.
B.
Make sure that all switches are in the OFF/NORM position.
C.
Disconnect electrical power from the airplane.
(1)
Disconnect external electrical power.
(2)
Disconnect the airplane battery.
D.
Attach maintenance warning tags to the battery and external power receptacle that have
"DO NOT
CONNECT ELECTRICAL POWER - MAINTENANCE IN PROGRESS"
written on them.
2.
Get access to remove the eight B-3339 Propeller Mounting Bolts and the A-2048-2 Washers as follows:
(Refer to the Model 208 Maintenance Manual, Chapter 61, Propeller (Hartzell) – Maintenance Practices.)
A.
Open the upper right cowling door and remove the right nose cap. (Refer to the Model 208
Maintenance Manual, Chapter 71, Nose Cap and Cowl Bulkhead Installation.)
B.
Remove the propeller reversing lever and the carbon block from the propeller beta feed back ring.
For the removal procedures for the propeller reversing lever refer to the applicable Pratt & Whitney
Engine Maintenance Manual.
C.
Remove the screws and the fiber washers that attach the spinner to the spinner bulkhead.
D.
Make an indexing mark on the spinner and a corresponding indexing mark on the spinner bulkhead
to make sure that you install it correctly.
NOTE:
The propeller installation has been dynamically balanced; therefore the original orientation
of the spinner dome to the bulkhead must remain unchanged to maintain dynamic balance.
E.
Remove the spinner.
CAUTION:
Make sure that the beta system compressor tool is not cocked. Do not forcibly
pull the feedback ring against the guide which limits forward travel.
F.
Put the beta system compressor tool in position at the forward section of the propeller. Attach the
tool flanges to the rod end ring of the propeller servo piston. Tighten the tool until the propeller
feedback ring is pulled forward to allow access to remove the eight B-3339 Propeller Mounting Bolts
and the A-2048-2 Washers.
G.
Cut the safety-wire from the eight B-3339 Propeller Mounting Bolts.
H.
Remove the torque from the eight B-3339 Propeller Mounting Bolts.
CAUTION:
Make sure that only one propeller mounting bolt is removed from the mounting
flange at one time. To make sure that the propeller is held in place correctly during
the accomplishment of this service letter, seven of the eight mounting bolts must
be installed at all times.
3.
Remove the first of the eight B-3339 Propeller Mounting Bolts and the A-2048-2 Washers as follows:
A.
As you remove the A-2048-2 Washer, see if the chamfered side of the washer faces the B-3339
Propeller Mounting Bolt or if the chamfered side of the washer faces the mounting flange of
the propeller. (Refer to the Model 208 Maintenance Manual, Chapter 61, Propeller (Hartzell) –
Maintenance Practices and the Hartzell Propeller Owner's Manual and Logbook.)
(1)
If the chamfered side of the A-2048-2 Washer faces the B-3339 Propeller Mounting Bolt,
do as follows:
(a)
Lubricate the threads and the underside of the removed bolt head with lubricant
conforming to AMS 2518 or MIL-T-83483.
