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DataBases updated: Feb 21st, 2025
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STC Holder: Columbia Helicopters

The Aviation DataBase -- STC Selection System
Aviation DataSource, Inc.

No. of STCs: 2

STC Holder: Columbia Helicopters
Address: 5407 North Lagoon Avenue, Portland, OR 97217, United States
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STC No.: SH205NWStatus: CurrentApp Date: Rev Date: 08/15/1975
TC Nos.: 1H16,
Models:
Boeing Defense & Space Group:
107-II
ACO: AIR-770: West Certification Branch SEA
Installation improved aft transmission lower case, modification of aft transmission upper case.
STC Holder: Columbia Helicopters
Address: 4747 North Channel Avenue, Portland, OR 97217, United States
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STC No.: SH422NWStatus: CurrentApp Date: Rev Date: 03/14/1977
TC Nos.: 1H16,
Models:
Boeing Defense & Space Group:
107-II
ACO: AIR-770: West Certification Branch SEA
Installation of electrical sensors on each main rotor blade to monitor blade integrity in flight.