AD 90-05-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Saab AB, Saab Aerosystems | SAAB 340B | Airworthiness Directives; SAAB-SCANIA Model SF-340A and SAAB 340B Series Airplanes |
| aircraft | Saab AB, Saab Aerosystems | 340A (SAAB SF340A) | Airworthiness Directives; SAAB-SCANIA Model SF-340A and SAAB 340B Series Airplanes |
Unsafe Condition
Loss of structural integrity of the powerplant installation due to improper installation of nuts/collars on the drag strut bolts, lower fittings, and attaching bolts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Within 50 hours time-in-service after the effective date, inspect the drag strut bolts, lower fittings, and attaching bolts to verify the type of nuts/collars installed. If MS21042L3 nuts are not installed, remove seven collars, inspect for defects, repair if necessary, and install MS21042L3 nuts with AN960KD10 or AN960KD10L washers. Compliance must be prior to further flight if non-compliant nuts are found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 hours time-in-service after the effective date of this AD, unless previously accomplished. Prior to further flight if non-compliant nuts are found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
SAAB-SCANIA Model SF-340A series airplanes, Serial Numbers 004 through 159; and SAAB 340B series airplanes, Serial Numbers 160 through 166.
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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