AD 85-22-13
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Lockheed Martin Corporation | L-1011-385-1 | LOCKHEED-CALIFORNIA COMPANY Model L-1011 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-14 | LOCKHEED-CALIFORNIA COMPANY Model L-1011 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-1-15 | LOCKHEED-CALIFORNIA COMPANY Model L-1011 Series Airplanes |
| aircraft | Lockheed Martin Corporation | L-1011-385-3 | LOCKHEED-CALIFORNIA COMPANY Model L-1011 Series Airplanes |
Unsafe Condition
Loss of pitch control as a result of loss of both pitch-system series trim-input bellcranks due to stress corrosion.
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Required Actions
Within 30 days after the effective date, visually inspect both pitch-system series trim-input bellcranks per Lockheed Service Bulletin 093-27-290. If no cracks, reinspect every 8 months. If one bellcrank is cracked, ensure no damage outside inspection area (per Figure 1, Sheet 2 of SB), reinspect every 10 days, and replace torque-tube assembly within 90 days. If both are cracked or conditions not met, replace torque-tube assembly before further flight.
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Compliance Time
Within 30 days after the effective date of this AD
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Affected Aircraft
Lockheed Model L-1011 series airplanes, certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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