AD 98-24-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Cessna Aircraft Company | 340A | Airworthiness Directives; Cessna Models 340A and 414A Airplanes |
| aircraft | Cessna Aircraft Company | 414A | Airworthiness Directives; Cessna Models 340A and 414A Airplanes |
Unsafe Condition
The engine exhaust system WYE tube, part numbers 9910299-25 or 9910299-26, may be manufactured without welds on critical parts adjacent to the firewall, leading to exhaust leaks that could cause aluminum fuel lines to burst with consequent fuel spillage, airplane fire, and/or explosion.
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Required Actions
Remove from service any WYE tube with part numbers 9910299-25 or 9910299-26. Replace them with P/N 9910299-8 (for P/N 9910299-25) or P/N 9910299-9 (for P/N 9910299-26), or any other FAA-approved WYE tube not listed. Compliance must be completed before further flight after December 21, 1998.
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Compliance Time
Prior to further flight after the effective date of this AD (December 21, 1998).
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Affected Aircraft
Cessna Models 340A (serial numbers 215 through 1817) and 414A (serial numbers 1 through 1212) equipped with any WYE tube part numbers 9910299-25 or 9910299-26 in the engine exhaust system.
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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