AD 96-25-20
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 6/5500/F-1 | Hamilton Standard 14RF and 14SF Series, and Hamilton Standard/British Aerospace Model 6/5500/F Propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 6/5500/F-2 | Hamilton Standard 14RF and 14SF Series, and Hamilton Standard/British Aerospace Model 6/5500/F Propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14RF-19 | Hamilton Standard 14RF and 14SF Series, and Hamilton Standard/British Aerospace Model 6/5500/F Propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14RF-21 | Hamilton Standard 14RF and 14SF Series, and Hamilton Standard/British Aerospace Model 6/5500/F Propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14RF-9 | Hamilton Standard 14RF and 14SF Series, and Hamilton Standard/British Aerospace Model 6/5500/F Propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14SF- 5 | Hamilton Standard 14RF and 14SF Series, and Hamilton Standard/British Aerospace Model 6/5500/F Propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14SF- 7 | Hamilton Standard 14RF and 14SF Series, and Hamilton Standard/British Aerospace Model 6/5500/F Propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14SF-11 | Hamilton Standard 14RF and 14SF Series, and Hamilton Standard/British Aerospace Model 6/5500/F Propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14SF-15 | Hamilton Standard 14RF and 14SF Series, and Hamilton Standard/British Aerospace Model 6/5500/F Propellers |
| aircraft | Hamilton Standard Division | Hamilton Sundstrand | 14SF-17 | Hamilton Standard 14RF and 14SF Series, and Hamilton Standard/British Aerospace Model 6/5500/F Propellers |
Unsafe Condition
Failure of critical control components, including transfer tube assemblies, actuator assemblies, and propeller control units (PCUs), could result in loss of propeller control and subsequent loss of aircraft control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Initial and repetitive inspections of critical control components for wear must be performed. Components not meeting return to service criteria must be removed and replaced with serviceable parts.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 6,000 hours time in service (TIS), or 3 years, whichever occurs first, after the effective date of this AD. Repetitive inspections are required at 10,500 hours TIS intervals thereafter.
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-11L, 14SF-15, 14SF-17, 14SF-19, 14SF-23; and Hamilton Standard/British Aerospace 6/5500/F propellers.
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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