AD 88-20-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | A36 | Airworthiness Directives; Beech Model F33A, A36 and B36TC Airplanes |
| aircraft | Textron Aviation Inc. | B36TC | Airworthiness Directives; Beech Model F33A, A36 and B36TC Airplanes |
| aircraft | Textron Aviation Inc. | F33A | Airworthiness Directives; Beech Model F33A, A36 and B36TC Airplanes |
Unsafe Condition
The Mortell 931 sound deadener material on the aft side of the firewall could cause a potential fire in the cabin.
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Required Actions
Remove the Mortell 931 sound deadener material from the aft side of the firewall per Beech Service Bulletin 2249. Flights may be conducted under FAR 21.197 to a location where this AD can be accomplished. Equivalent compliance may be approved by the FAA Wichita Aircraft Certification Office.
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Compliance Time
within the next 100 hours time-in-service after the effective date of this AD
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Affected Aircraft
Beech Model F33A (serial numbers CE-1162 through CE-1223), A36 (serial numbers E-2383 through E-2405, E-2407 through E-2409), and B36TC (serial numbers EA-468 through EA-470, EA-472 through EA-474)
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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