Textron Aviation 208 Maintenance Manual

1. General
A. The following data contains instructions for the removal and installation of the detector, thermostat, horn, and the horn
disconnect switch. This section also includes the stall warning operational check, detector adjustment and the stall warning
heat check.
2. Stall Warning Detector Removal/Installation
A. Remove the Stall Warning Detector (Refer to Figure 201).
CAUTION: Do a careful check of the detector before you remove it from airplane. It is possible for the detector
to be too hot to handle without hand protection.
NOTE: (Airplanes 20800316 and On and 208B0800 and On and Airplanes 20800001 thru 20800315 and
208B0001 thru 208B0799 incorporating CAB00-1) To preclude or disable nuisance stall warnings
during ground operation, push the control yoke forward to the stop position. This will engage the
disconnect switch for the ground stall warning horn.
(1) Make sure the airplane master switches are set in the OFF position.
(2) Remove the attaching screws and the lower wing panel 503BB. Refer to Chapter 6, Access Plates and Panels
Identification - Description and Operation.
(3) Remove screws attaching detector to airplane.
(4) Mark exact fore and aft location of vane on wing to ensure correct installation.
(5) Identify and disconnect electrical wires from detector.
(6) Remove the detector from wing.
B. Install Stall Warning Detector (Refer to Figure 201).
(1) Position detector up to wing.
(2) Connect electrical wires to detector.
(3) Insert detector into leading edge.
(4) Secure detector to airplane using screws.
(5) Do an operational check of the stall warning system. Refer to Stall Warning System - Inspection/Check, Stall Warning
System Operational Check.
(6) Install the lower wing panel 503BB with the attaching screws. Refer to Chapter 6, Access Plates and Panels
Identification - Description and Operation.
(7) Perform a Stall Warning Flight Operational Check. Refer to Stall Warning Flight Operational Check.
(8) If the stall warning signal did not sound within the specified airspeed range, do the Stall Warning Detector
Adjustment. Refer to Stall Warning Detector Adjustment (Airplanes 20800001 thru 20800056).
3. Stall Warning Lift Transducer Removal/Installation For TKS Equipped Airplane
A. Remove the Stall Warning Lift Transducer (Refer to Figure 202).
CAUTION: Do a careful check of the lift transducer before you remove it from airplane. It is possible for the lift
transducer to be too hot to handle without hand protection.
(1) Make sure that the airplane master switches are set in the OFF position.
(2) Remove the attaching screws and the lower wing panel 503BB. Refer to Chapter 6, Access Plates and Panels
Identification - Description and Operation.
(3) Mark the exact fore and aft location of vane on the wing for correct installation.
(4) Remove the sealant between the perimeter of the lift transducer and the wing porous panel.
(5) Remove and keep the screws and washers that attach the lift transducer to the wing. Discard the nuts.
(a) Make a note of the location of the shim washers that are between the lift transducer and the wing leading edge.
(6) Identify and disconnect the electrical wires from lift transducer.
(7) Remove the lift transducer from wing.
B. Install the Stall Warning Lift Transducer (Refer to Figure 202).
(1) Discard the gasket that comes with a new lift transducer.
Copyright © Textron Aviation Inc.
Retain printed data for historical reference only. For future maintenance, use only current data.
STALL WARNING SYSTEM - MAINTENANCE PRACTICES
Model 208/208B Maintenance Manual (Rev 33)
27-31-00-2 (Rev 28)
Print Date: Mon May 08 12:14:36 CDT 2023
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