AD 70-15-19
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 747-100 Series | BOEING Model 747-100 Series Airplanes |
Unsafe Condition
Malfunction of the ground steering system and its causes, specifically related to the 60B00210-1 nose gear steering metering valve assembly.
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Required Actions
Within 10 hours' time in service after the effective date, establish pilot surveillance via an FAA-approved training program, follow equivalent approved procedures, or install a specific placard. Test the nose gear steering metering valve and tiller system within 25 hours. Replace non-compliant valves with P/N 60B00210-2 or approved equivalents before further flight. Inspect and correct tiller systems if needed. Replace all P/N 60B00210-1 valves with P/N 60B00210-2 within 600 hours.
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Compliance Time
Within the specified time frames: 10 hours, 25 hours, 600 hours' time in service after July 30, 1970, as per each requirement.
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Affected Aircraft
Boeing Model 747-100 Series airplanes with 60B00210-1 nose gear steering metering valve assembly.
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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