AD 87-16-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron Aviation Inc. | 58 | Airworthiness Directives; Beech Model 58 Airplanes |
Unsafe Condition
Loss of stall warning capability in icing conditions.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Install a placard stating 'FLIGHT INTO KNOWN ICING CONDITIONS IS PROHIBITED' on the instrument panel within 25 hours time-in-service. Place a copy of this AD in the POH/AFM Limitation Section. Cover the existing 'approved for flight in icing conditions' placard with opaque tape. Inspect and modify the stall warning heater circuit per SB 2180 within 100 hours time-in-service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 25 hours time-in-service (unless the inspection and relay installation requirements of paragraph (c) have been accomplished) and within the next 100 hours time-in-service after the effective date of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Beech Model 58 airplanes with serial numbers TH-1389, TH-1396, TH-1397, TH-1403, TH-1407 through TH-1410, TH-1412, TH-1414, TH-1416, TH-1420 through TH-1423, TH-1425, TH-1427, TH-1430, TH-1434, TH-1438, TH-1440, TH-1442, TH-1443, TH-1445, TH-1447, TH-1451, TH-1452, TH-1456, TH-1457, TH-1459, TH-1462, TH-1463, TH-1466, TH-1468, TH-1472 through TH-1474, TH-1477, TH-1478, TH-1481, TH-1483, TH-1485, TH-1490, TH-1492, TH-1495 through TH-1497, TH-1499, TH-1500, TH-1502, and TH-1506.
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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