AD 89-09-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Saab AB, Saab Aerosystems | 340A (SAAB SF340A) | Airworthiness Directives; SAAB-SCANIA Model SF-340A Series Airplanes |
Unsafe Condition
Reduced structural capability of the fuselage due to potential leakage of hot air and delamination of the stringer to skin bonding in the Environmental Control System (ECS) compartment.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the insulation in the ECS compartment and secure the Gamah Couplings with a locking wire per SF340-21-022. If hot air leakage is found, inspect for delamination of the stringer to skin bonding and repair as needed per SF340-53-025. Submit alternate compliance requests through an FAA PMI to the Manager, Standardization Branch, ANM-113.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 30 days after the effective date of this AD (May 16, 1989) for the initial inspection. If leakage is found, prior to further flight for the subsequent inspection and repair.
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Affected Aircraft
Saab AB, Saab Aerosystems Model SF-340A series airplanes, serial numbers -003 through -138, 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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