AD 93-06-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 6/5500/F-1 | HAMILTON STANDARD Models 14RF-9, 14RF-19, and 14RF-21, and Models 14SF-5, 14SF-7, 14SF-11, 14SF-15, 14SF-17, 14SF-19, and 14SF-23 Propellers, and Hamilton Standard-British Aerospace Model 6/5500/F-1 propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14RF-19 | HAMILTON STANDARD Models 14RF-9, 14RF-19, and 14RF-21, and Models 14SF-5, 14SF-7, 14SF-11, 14SF-15, 14SF-17, 14SF-19, and 14SF-23 Propellers, and Hamilton Standard-British Aerospace Model 6/5500/F-1 propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14RF-21 | HAMILTON STANDARD Models 14RF-9, 14RF-19, and 14RF-21, and Models 14SF-5, 14SF-7, 14SF-11, 14SF-15, 14SF-17, 14SF-19, and 14SF-23 Propellers, and Hamilton Standard-British Aerospace Model 6/5500/F-1 propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14RF-9 | HAMILTON STANDARD Models 14RF-9, 14RF-19, and 14RF-21, and Models 14SF-5, 14SF-7, 14SF-11, 14SF-15, 14SF-17, 14SF-19, and 14SF-23 Propellers, and Hamilton Standard-British Aerospace Model 6/5500/F-1 propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14SF- 5 | HAMILTON STANDARD Models 14RF-9, 14RF-19, and 14RF-21, and Models 14SF-5, 14SF-7, 14SF-11, 14SF-15, 14SF-17, 14SF-19, and 14SF-23 Propellers, and Hamilton Standard-British Aerospace Model 6/5500/F-1 propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14SF- 7 | HAMILTON STANDARD Models 14RF-9, 14RF-19, and 14RF-21, and Models 14SF-5, 14SF-7, 14SF-11, 14SF-15, 14SF-17, 14SF-19, and 14SF-23 Propellers, and Hamilton Standard-British Aerospace Model 6/5500/F-1 propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14SF-11 | HAMILTON STANDARD Models 14RF-9, 14RF-19, and 14RF-21, and Models 14SF-5, 14SF-7, 14SF-11, 14SF-15, 14SF-17, 14SF-19, and 14SF-23 Propellers, and Hamilton Standard-British Aerospace Model 6/5500/F-1 propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14SF-15 | HAMILTON STANDARD Models 14RF-9, 14RF-19, and 14RF-21, and Models 14SF-5, 14SF-7, 14SF-11, 14SF-15, 14SF-17, 14SF-19, and 14SF-23 Propellers, and Hamilton Standard-British Aerospace Model 6/5500/F-1 propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14SF-17 | HAMILTON STANDARD Models 14RF-9, 14RF-19, and 14RF-21, and Models 14SF-5, 14SF-7, 14SF-11, 14SF-15, 14SF-17, 14SF-19, and 14SF-23 Propellers, and Hamilton Standard-British Aerospace Model 6/5500/F-1 propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14SF-19 | HAMILTON STANDARD Models 14RF-9, 14RF-19, and 14RF-21, and Models 14SF-5, 14SF-7, 14SF-11, 14SF-15, 14SF-17, 14SF-19, and 14SF-23 Propellers, and Hamilton Standard-British Aerospace Model 6/5500/F-1 propellers |
Unsafe Condition
Loss of control of the propeller blade pitch due to propeller control unit (PCU) ballscrew quill wear.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove titanium nitrided transfer tubes within 10 hours time in service, replace PCU ballscrew quill with a new or unmatched quill, install A-1 nitrided transfer tubes marked per applicable SB. For propellers with A-1 transfer tubes and suspect quills, replace the quill within 30 hours TIS. Mark all A-1 transfer tubes with new part numbers per specified ASBs within 60 days.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 10 hours time in service (TIS) after the effective date; within 30 hours TIS; within 60 days after the effective date.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Hamilton Standard Models 14RF-9, 14RF-19, 14RF-21, 14SF-5, 14SF-7, 14SF-11, 14SF-15, 14SF-17, 14SF-19, 14SF-23, and Hamilton Standard-British Aerospace Model 6/5500/F-1 propellers installed on specified aircraft models.
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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