Incorporate a de-icing system (as manufactured by applicant) externally on Rotol propeller spinner as an alternate to Dowty Rotol internal elements. If applied to original spinner, Montgomery Systems Tech., Inc. P/N 72196-2 will apply. If applied to a new aluminum nose spinner P/N 72196-1 will apply. Dowty Rotol Service Bulletin Section 61-170 pages 1 and 2 outlines a revised spinner de-icing system. This is a Napier external system. Approval of the A.R.B. is indicated. (Continued on page 3)

Please contact modification supplier for further details.

STC Status: Reissued
STC Date: 20/12/11
Responsible Office: Los Angeles Aircraft Certification Office (ANM-100L), Tel: (562) 627-5200

BAE Systems (Operations) Limited

• HS 748 Series 2A
• HS 748 Series 2B

• F27 Mark 050
• F27 Mark 100
• F27 Mark 200
• F27 Mark 300
• F27 Mark 400
• F27 Mark 500
• F27 Mark 600
• F27 Mark 700

• G-159

• F-27
• F-27A
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• Viscount 745D
• Viscount 810