AD 98-25-09
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier Inc. | Viking Air Limited | DHC-8-101 | Bombardier Models DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, DHC-7-103, DHC-8-100, DHC-8-200, and DHC-8-300 Series Airplanes |
| aircraft | Bombardier Inc. | Viking Air Limited | DHC-8-102 | Bombardier Models DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, DHC-7-103, DHC-8-100, DHC-8-200, and DHC-8-300 Series Airplanes |
| aircraft | Bombardier Inc. | Viking Air Limited | DHC-8-103 | Bombardier Models DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, DHC-7-103, DHC-8-100, DHC-8-200, and DHC-8-300 Series Airplanes |
| aircraft | Bombardier Inc. | Viking Air Limited | DHC-8-106 | Bombardier Models DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, DHC-7-103, DHC-8-100, DHC-8-200, and DHC-8-300 Series Airplanes |
| aircraft | Bombardier Inc. | Viking Air Limited | DHC-8-201 | Bombardier Models DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, DHC-7-103, DHC-8-100, DHC-8-200, and DHC-8-300 Series Airplanes |
| aircraft | Bombardier Inc. | Viking Air Limited | DHC-8-202 | Bombardier Models DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, DHC-7-103, DHC-8-100, DHC-8-200, and DHC-8-300 Series Airplanes |
| aircraft | Bombardier Inc. | Viking Air Limited | DHC-8-301 | Bombardier Models DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, DHC-7-103, DHC-8-100, DHC-8-200, and DHC-8-300 Series Airplanes |
| aircraft | Bombardier Inc. | Viking Air Limited | DHC-8-311 | Bombardier Models DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, DHC-7-103, DHC-8-100, DHC-8-200, and DHC-8-300 Series Airplanes |
| aircraft | Bombardier Inc. | Viking Air Limited | DHC-8-315 | Bombardier Models DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, DHC-7-103, DHC-8-100, DHC-8-200, and DHC-8-300 Series Airplanes |
| aircraft | Bombardier Inc. | Viking Air Limited | DHC-7-1 | Bombardier Models DHC-7-1, DHC-7-100, DHC-7-101, DHC-7-102, DHC-7-103, DHC-8-100, DHC-8-200, and DHC-8-300 Series Airplanes |
Unsafe Condition
Failure of the brake shuttle valves, and consequent loss of the brake effectiveness, due to installation of improper filter fittings, which could reduce controllability of the airplane during taxi, takeoff, and landing roll.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 3 months after the effective date, perform a one-time visual inspection to determine the serial numbers of the brake shuttle valves. If any brake shuttle valve with S/N 2162A through 2244A is installed, replace the filter fittings with new ones before further flight. Also, prohibit installation of brake shuttle valves with part number 5084-1 unless inspected and defective fittings replaced.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 3 months after the effective date of this AD, and prior to further flight if applicable.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Bombardier Inc. | Viking Air Limited models DHC-7-1, -100, -101, -102, -103 with serial numbers 003 through 113; and DHC-8-100, -200, -300 series with serial numbers 003 through 498 inclusive.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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