AD 91-08-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviatech Inc. | Bombardier Inc. | Pilot and Co-Pilot seats | Airworthiness Directives; AVIATECH INC.: Applicability: Aviatech Inc., TSO-C39a Pilot and Co-Pilot Seats Model 394 |
| aircraft | Aviatech Inc. | Bombardier Inc. | DHC-8-101 | Airworthiness Directives; AVIATECH INC.: Applicability: Aviatech Inc., TSO-C39a Pilot and Co-Pilot Seats Model 394 |
| aircraft | Aviatech Inc. | Bombardier Inc. | DHC-8-102 | Airworthiness Directives; AVIATECH INC.: Applicability: Aviatech Inc., TSO-C39a Pilot and Co-Pilot Seats Model 394 |
| aircraft | Aviatech Inc. | Bombardier Inc. | DHC-8-103 | Airworthiness Directives; AVIATECH INC.: Applicability: Aviatech Inc., TSO-C39a Pilot and Co-Pilot Seats Model 394 |
| aircraft | Aviatech Inc. | Bombardier Inc. | DHC-8-106 | Airworthiness Directives; AVIATECH INC.: Applicability: Aviatech Inc., TSO-C39a Pilot and Co-Pilot Seats Model 394 |
| aircraft | Aviatech Inc. | Bombardier Inc. | DHC-8-201 | Airworthiness Directives; AVIATECH INC.: Applicability: Aviatech Inc., TSO-C39a Pilot and Co-Pilot Seats Model 394 |
| aircraft | Aviatech Inc. | Bombardier Inc. | DHC-8-202 | Airworthiness Directives; AVIATECH INC.: Applicability: Aviatech Inc., TSO-C39a Pilot and Co-Pilot Seats Model 394 |
| aircraft | Aviatech Inc. | Bombardier Inc. | DHC-8-301 | Airworthiness Directives; AVIATECH INC.: Applicability: Aviatech Inc., TSO-C39a Pilot and Co-Pilot Seats Model 394 |
| aircraft | Aviatech Inc. | Bombardier Inc. | DHC-8-311 | Airworthiness Directives; AVIATECH INC.: Applicability: Aviatech Inc., TSO-C39a Pilot and Co-Pilot Seats Model 394 |
| aircraft | Aviatech Inc. | Bombardier Inc. | DHC-8-315 | Airworthiness Directives; AVIATECH INC.: Applicability: Aviatech Inc., TSO-C39a Pilot and Co-Pilot Seats Model 394 |
Unsafe Condition
The pilot and co-pilot shoulder harness may become excessively worn and frayed, resulting in failure of the shoulder harness.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the pilot and co-pilot seats to determine if affected part numbers are inscribed on the FAA-TSO-C39a tag. Modify all affected seats by installing new backrest cushion-covers and a roller-guide for the shoulder harness using Aviatech Kit No. 394-25-002 per Service Bulletin No. 2, Model 394, Revision A. Special flight permits may be issued under FAR 21.197 and 21.199.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within the next 90 days after the effective date of this AD, unless already accomplished
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Aviatech Inc. Pilot and Co-Pilot seats Model 394 series with Part Numbers 394 (000) 01-06 and 394-(001) -01-06, installed on Boeing of Canada, Ltd., deHavilland Division Model DHC-8
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.