AD 87-02-05 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 727-100 Series | Boeing Models 727, 737-100, and 737-200 Series Airplanes |
| aircraft | The Boeing Company | 727-100C Series | Boeing Models 727, 737-100, and 737-200 Series Airplanes |
| aircraft | The Boeing Company | 727-200 Series | Boeing Models 727, 737-100, and 737-200 Series Airplanes |
| aircraft | The Boeing Company | 727-200F Series | Boeing Models 727, 737-100, and 737-200 Series Airplanes |
| aircraft | The Boeing Company | 727 Series | Boeing Models 727, 737-100, and 737-200 Series Airplanes |
| aircraft | The Boeing Company | 727C Series | Boeing Models 727, 737-100, and 737-200 Series Airplanes |
| aircraft | The Boeing Company | 737-100 Series | Boeing Models 727, 737-100, and 737-200 Series Airplanes |
| aircraft | The Boeing Company | 737-200 Series | Boeing Models 727, 737-100, and 737-200 Series Airplanes |
Unsafe Condition
Hydraulic system 'B' Abex P/N 57186 pump motor internal wiring fault could burn a hole in the case and ignite escaping hydraulic fluid, which could ignite fuel leakage.
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Required Actions
Within 300 hours time in service after the effective date, perform visual inspections for fuel leakage in left wing-body fairing area (Model 727) or main wheel wells (Model 737) per applicable service bulletins. Correct any leakage or conditions leading to leakage before further flight. Install ground fault protection systems or upgraded hydraulic 'B' system pumps within 1,000 hours time in service prior to February 2, 1988.
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Compliance Time
Within the next 300 hours time in service after the effective date of this AD, unless already accomplished within the last 700 hours time in service, and thereafter at intervals not to exceed 1,000 hours time in service
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Affected Aircraft
Boeing Models 727, 737-100, and 737-200 series airplanes equipped with hydraulic system 'B' Abex P/N 57186 pump motor, 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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