AD 88-01-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | 727-100 Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-100C Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-200 Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727-200F Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727 Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
| aircraft | The Boeing Company | 727C Series | Airworthiness Directives; BOEING Model 727 Series Airplanes |
Unsafe Condition
Main landing gear failure to extend properly due to structural failure in the lock system.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect main landing gear manual extension support yoke attach bolts for size and condition, replace with larger bolts if necessary prior to further flight. Replace aluminum MLG downlock cranks with new steel cranks prior to 25,000 landings or one year after AD effective date, whichever is later.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 3,000 landings after the effective date of this AD for bolt inspection and replacement. Prior to the accumulation of 25,000 landings or within one year after the effective date of this AD, whichever occurs later, for crank replacement.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Model 727 series airplanes through Line Number 1607, certificated in any category.
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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